add

backend/pom.xml

@@ -0,0 +1,76 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.car</groupId>
+    <artifactId>car-rental</artifactId>
+    <version>1.0.0</version>
+    <name>car-rental</name>
+    <description>Car rental platform</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.2.5</version>
+        <relativePath/>
+    </parent>
+
+    <properties>
+        <java.version>17</java.version>
+        <mybatis.version>3.0.3</mybatis.version>
+        <sa.token.version>1.38.0</sa.token.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>${mybatis.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>cn.dev33</groupId>
+            <artifactId>sa-token-spring-boot3-starter</artifactId>
+            <version>${sa.token.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>cn.dev33</groupId>
+            <artifactId>sa-token-jwt</artifactId>
+            <version>${sa.token.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-crypto</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

backend/sql/init.sql

@@ -0,0 +1,85 @@
+create database if not exists car_rental default character set utf8mb4 collate utf8mb4_general_ci;
+use car_rental;
+
+create table if not exists users (
+    id bigint primary key auto_increment,
+    username varchar(50) not null unique,
+    password varchar(255) not null,
+    phone varchar(50),
+    email varchar(100),
+    role varchar(20) not null,
+    status varchar(20) not null,
+    balance decimal(10,2) default 0,
+    real_name_status varchar(20) default 'NONE',
+    real_name varchar(50),
+    id_number varchar(30),
+    id_front varchar(255),
+    id_back varchar(255),
+    created_at datetime,
+    updated_at datetime
+);
+
+create table if not exists cars (
+    id bigint primary key auto_increment,
+    brand varchar(50),
+    model varchar(50),
+    plate_no varchar(50),
+    price_per_day decimal(10,2),
+    deposit decimal(10,2),
+    status varchar(20),
+    is_special tinyint(1) default 0,
+    images text,
+    description text,
+    seats int,
+    transmission varchar(20),
+    fuel_type varchar(20),
+    mileage int,
+    created_at datetime,
+    updated_at datetime
+);
+
+create table if not exists favorites (
+    id bigint primary key auto_increment,
+    user_id bigint not null,
+    car_id bigint not null,
+    created_at datetime,
+    unique key uk_user_car(user_id, car_id)
+);
+
+create table if not exists orders (
+    id bigint primary key auto_increment,
+    order_no varchar(64) not null unique,
+    user_id bigint not null,
+    car_id bigint not null,
+    start_date date,
+    end_date date,
+    days int,
+    price_per_day decimal(10,2),
+    deposit decimal(10,2),
+    total_amount decimal(10,2),
+    status varchar(20),
+    pay_type varchar(20),
+    paid_at datetime,
+    created_at datetime,
+    updated_at datetime
+);
+
+create table if not exists payments (
+    id bigint primary key auto_increment,
+    order_id bigint not null,
+    user_id bigint not null,
+    amount decimal(10,2),
+    type varchar(20),
+    created_at datetime
+);
+
+insert into users(username, password, phone, email, role, status, balance, real_name_status, created_at, updated_at)
+values ('admin', '$2a$10$7hErhcmS8xj6QcGbe0yE0eDBn5OQWw4tGxqVylxYxe3CxbJc88x76', '13800000000', 'admin@example.com', 'ADMIN', 'ACTIVE', 0, 'NONE', now(), now())
+on duplicate key update username = username;
+
+insert into cars(brand, model, plate_no, price_per_day, deposit, status, is_special, seats, transmission, fuel_type, mileage, description, created_at, updated_at)
+values
+('丰田', '卡罗拉', '粤A12345', 200, 1000, 'AVAILABLE', 0, 5, 'AT', '汽油', 32000, '经济实用，适合通勤', now(), now()),
+('特斯拉', 'Model 3', '粤B54321', 500, 2000, 'AVAILABLE', 1, 5, 'AT', '电动', 18000, '电动轿跑，舒适安静', now(), now()),
+('本田', 'CR-V', '粤C67890', 350, 1500, 'AVAILABLE', 0, 5, 'AT', '汽油', 40000, '空间大，适合家庭出行', now(), now())
+on duplicate key update plate_no = plate_no;

backend/src/main/java/com/car/CarRentalApplication.java

@@ -0,0 +1,11 @@
+package com.car;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CarRentalApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(CarRentalApplication.class, args);
+    }
+}

backend/src/main/java/com/car/common/ApiException.java

@@ -0,0 +1,13 @@
+package com.car.common;
+
+import lombok.Getter;
+
+@Getter
+public class ApiException extends RuntimeException {
+    private final int code;
+
+    public ApiException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+}

backend/src/main/java/com/car/common/ApiResponse.java

@@ -0,0 +1,26 @@
+package com.car.common;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class ApiResponse<T> {
+    private int code;
+    private String message;
+    private T data;
+
+    public static <T> ApiResponse<T> ok(T data) {
+        return new ApiResponse<>(0, "OK", data);
+    }
+
+    public static ApiResponse<Void> ok() {
+        return new ApiResponse<>(0, "OK", null);
+    }
+
+    public static ApiResponse<Void> error(int code, String message) {
+        return new ApiResponse<>(code, message, null);
+    }
+}

backend/src/main/java/com/car/common/ErrorCode.java

@@ -0,0 +1,10 @@
+package com.car.common;
+
+public class ErrorCode {
+    public static final int BAD_REQUEST = 400;
+    public static final int UNAUTHORIZED = 401;
+    public static final int FORBIDDEN = 403;
+    public static final int NOT_FOUND = 404;
+    public static final int CONFLICT = 409;
+    public static final int SERVER_ERROR = 500;
+}

backend/src/main/java/com/car/common/GlobalExceptionHandler.java

@@ -0,0 +1,39 @@
+package com.car.common;
+
+import cn.dev33.satoken.exception.NotLoginException;
+import jakarta.validation.ConstraintViolationException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(ApiException.class)
+    public ApiResponse<Void> handleApiException(ApiException ex) {
+        return ApiResponse.error(ex.getCode(), ex.getMessage());
+    }
+
+    @ExceptionHandler(NotLoginException.class)
+    public ApiResponse<Void> handleNotLogin(NotLoginException ex) {
+        return ApiResponse.error(ErrorCode.UNAUTHORIZED, "请先登录");
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ApiResponse<Void> handleValid(MethodArgumentNotValidException ex) {
+        String msg = ex.getBindingResult().getAllErrors().isEmpty()
+                ? "参数错误"
+                : ex.getBindingResult().getAllErrors().get(0).getDefaultMessage();
+        return ApiResponse.error(ErrorCode.BAD_REQUEST, msg);
+    }
+
+    @ExceptionHandler(ConstraintViolationException.class)
+    public ApiResponse<Void> handleConstraint(ConstraintViolationException ex) {
+        return ApiResponse.error(ErrorCode.BAD_REQUEST, ex.getMessage());
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ApiResponse<Void> handleGeneric(Exception ex) {
+        return ApiResponse.error(ErrorCode.SERVER_ERROR, ex.getMessage());
+    }
+}

backend/src/main/java/com/car/config/SecurityConfig.java

@@ -0,0 +1,13 @@
+package com.car.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+
+@Configuration
+public class SecurityConfig {
+    @Bean
+    public BCryptPasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}

backend/src/main/java/com/car/config/StpInterfaceImpl.java

@@ -0,0 +1,32 @@
+package com.car.config;
+
+import cn.dev33.satoken.stp.StpInterface;
+import com.car.entity.User;
+import com.car.mapper.UserMapper;
+import org.springframework.stereotype.Component;
+
+import java.util.Collections;
+import java.util.List;
+
+@Component
+public class StpInterfaceImpl implements StpInterface {
+    private final UserMapper userMapper;
+
+    public StpInterfaceImpl(UserMapper userMapper) {
+        this.userMapper = userMapper;
+    }
+
+    @Override
+    public List<String> getPermissionList(Object loginId, String loginType) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public List<String> getRoleList(Object loginId, String loginType) {
+        User user = userMapper.findById(Long.valueOf(loginId.toString()));
+        if (user == null || user.getRole() == null) {
+            return Collections.emptyList();
+        }
+        return Collections.singletonList(user.getRole());
+    }
+}

backend/src/main/java/com/car/config/WebConfig.java

@@ -0,0 +1,17 @@
+package com.car.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOriginPatterns("*")
+                .allowedMethods("*")
+                .allowedHeaders("*")
+                .allowCredentials(true);
+    }
+}

backend/src/main/java/com/car/controller/AdminController.java

@@ -0,0 +1,107 @@
+package com.car.controller;
+
+import cn.dev33.satoken.stp.StpUtil;
+import com.car.common.ApiResponse;
+import com.car.common.ApiException;
+import com.car.common.ErrorCode;
+import com.car.entity.Car;
+import com.car.entity.Order;
+import com.car.entity.User;
+import com.car.service.CarService;
+import com.car.service.OrderService;
+import com.car.service.StatsService;
+import com.car.service.UserService;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/admin")
+public class AdminController {
+    private final UserService userService;
+    private final CarService carService;
+    private final OrderService orderService;
+    private final StatsService statsService;
+
+    public AdminController(UserService userService, CarService carService, OrderService orderService, StatsService statsService) {
+        this.userService = userService;
+        this.carService = carService;
+        this.orderService = orderService;
+        this.statsService = statsService;
+    }
+
+    private void checkAdmin() {
+        if (!StpUtil.hasRole("ADMIN")) {
+            throw new ApiException(ErrorCode.FORBIDDEN, "需要管理员权限");
+        }
+    }
+
+    @GetMapping("/users")
+    public ApiResponse<List<User>> listUsers(@RequestParam(required = false) String keyword) {
+        checkAdmin();
+        return ApiResponse.ok(userService.listUsers(keyword));
+    }
+
+    @PostMapping("/users/{userId}/status")
+    public ApiResponse<User> changeStatus(@PathVariable Long userId, @RequestParam String status) {
+        checkAdmin();
+        return ApiResponse.ok(userService.changeStatus(userId, status));
+    }
+
+    @PostMapping("/real-name/{userId}/approve")
+    public ApiResponse<User> approve(@PathVariable Long userId) {
+        checkAdmin();
+        return ApiResponse.ok(userService.reviewRealName(userId, true));
+    }
+
+    @PostMapping("/real-name/{userId}/reject")
+    public ApiResponse<User> reject(@PathVariable Long userId) {
+        checkAdmin();
+        return ApiResponse.ok(userService.reviewRealName(userId, false));
+    }
+
+    @GetMapping("/cars")
+    public ApiResponse<List<Car>> listCars(@RequestParam(required = false) String keyword,
+                                           @RequestParam(required = false) Boolean isSpecial) {
+        checkAdmin();
+        return ApiResponse.ok(carService.list(keyword, isSpecial));
+    }
+
+    @PostMapping("/cars")
+    public ApiResponse<Car> createCar(@RequestBody Car car) {
+        checkAdmin();
+        return ApiResponse.ok(carService.create(car));
+    }
+
+    @PutMapping("/cars")
+    public ApiResponse<Car> updateCar(@RequestBody Car car) {
+        checkAdmin();
+        return ApiResponse.ok(carService.update(car));
+    }
+
+    @DeleteMapping("/cars/{id}")
+    public ApiResponse<Void> deleteCar(@PathVariable Long id) {
+        checkAdmin();
+        carService.delete(id);
+        return ApiResponse.ok();
+    }
+
+    @GetMapping("/orders")
+    public ApiResponse<List<Order>> listOrders(@RequestParam(required = false) String status) {
+        checkAdmin();
+        return ApiResponse.ok(orderService.listAll(status));
+    }
+
+    @GetMapping("/stats/orders")
+    public ApiResponse<Map<String, Object>> orderStats() {
+        checkAdmin();
+        return ApiResponse.ok(statsService.orderStats());
+    }
+
+    @GetMapping("/stats/finance")
+    public ApiResponse<Map<String, Object>> financeStats() {
+        checkAdmin();
+        return ApiResponse.ok(statsService.financeStats());
+    }
+}

backend/src/main/java/com/car/controller/AuthController.java

@@ -0,0 +1,44 @@
+package com.car.controller;
+
+import cn.dev33.satoken.stp.StpUtil;
+import com.car.common.ApiResponse;
+import com.car.dto.LoginRequest;
+import com.car.dto.RegisterRequest;
+import com.car.entity.User;
+import com.car.service.UserService;
+import jakarta.validation.Valid;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/auth")
+public class AuthController {
+    private final UserService userService;
+
+    public AuthController(UserService userService) {
+        this.userService = userService;
+    }
+
+    @PostMapping("/register")
+    public ApiResponse<User> register(@Valid @RequestBody RegisterRequest request) {
+        return ApiResponse.ok(userService.register(request));
+    }
+
+    @PostMapping("/login")
+    public ApiResponse<Map<String, Object>> login(@Valid @RequestBody LoginRequest request) {
+        User user = userService.login(request);
+        StpUtil.login(user.getId());
+        Map<String, Object> data = new HashMap<>();
+        data.put("token", StpUtil.getTokenValue());
+        data.put("role", user.getRole());
+        return ApiResponse.ok(data);
+    }
+
+    @PostMapping("/logout")
+    public ApiResponse<Void> logout() {
+        StpUtil.logout();
+        return ApiResponse.ok();
+    }
+}

backend/src/main/java/com/car/controller/CarController.java

@@ -0,0 +1,29 @@
+package com.car.controller;
+
+import com.car.common.ApiResponse;
+import com.car.entity.Car;
+import com.car.service.CarService;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/cars")
+public class CarController {
+    private final CarService carService;
+
+    public CarController(CarService carService) {
+        this.carService = carService;
+    }
+
+    @GetMapping
+    public ApiResponse<List<Car>> list(@RequestParam(required = false) String keyword,
+                                       @RequestParam(required = false) Boolean isSpecial) {
+        return ApiResponse.ok(carService.list(keyword, isSpecial));
+    }
+
+    @GetMapping("/{id}")
+    public ApiResponse<Car> detail(@PathVariable Long id) {
+        return ApiResponse.ok(carService.get(id));
+    }
+}

backend/src/main/java/com/car/controller/UserController.java

@@ -0,0 +1,109 @@
+package com.car.controller;
+
+import cn.dev33.satoken.stp.StpUtil;
+import com.car.common.ApiResponse;
+import com.car.dto.BalanceRequest;
+import com.car.dto.OrderCreateRequest;
+import com.car.dto.PayRequest;
+import com.car.dto.RealNameRequest;
+import com.car.entity.Favorite;
+import com.car.entity.Order;
+import com.car.entity.User;
+import com.car.service.FavoriteService;
+import com.car.service.OrderService;
+import com.car.service.UserService;
+import com.car.util.AuthUtil;
+import jakarta.validation.Valid;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/user")
+public class UserController {
+    private final UserService userService;
+    private final FavoriteService favoriteService;
+    private final OrderService orderService;
+
+    public UserController(UserService userService, FavoriteService favoriteService, OrderService orderService) {
+        this.userService = userService;
+        this.favoriteService = favoriteService;
+        this.orderService = orderService;
+    }
+
+    @GetMapping("/me")
+    public ApiResponse<User> me() {
+        Long userId = AuthUtil.getUserId();
+        User user = userService.getById(userId);
+        if (user != null) {
+            user.setPassword(null);
+        }
+        return ApiResponse.ok(user);
+    }
+
+    @PutMapping("/profile")
+    public ApiResponse<User> updateProfile(@RequestBody User user) {
+        Long userId = AuthUtil.getUserId();
+        user.setId(userId);
+        return ApiResponse.ok(userService.updateProfile(user));
+    }
+
+    @PostMapping("/real-name")
+    public ApiResponse<User> realName(@Valid @RequestBody RealNameRequest request) {
+        Long userId = AuthUtil.getUserId();
+        return ApiResponse.ok(userService.submitRealName(userId, request));
+    }
+
+    @PostMapping("/balance")
+    public ApiResponse<User> addBalance(@Valid @RequestBody BalanceRequest request) {
+        Long userId = AuthUtil.getUserId();
+        return ApiResponse.ok(userService.addBalance(userId, request));
+    }
+
+    @PostMapping("/favorite/{carId}")
+    public ApiResponse<Void> addFavorite(@PathVariable Long carId) {
+        favoriteService.add(AuthUtil.getUserId(), carId);
+        return ApiResponse.ok();
+    }
+
+    @DeleteMapping("/favorite/{carId}")
+    public ApiResponse<Void> removeFavorite(@PathVariable Long carId) {
+        favoriteService.remove(AuthUtil.getUserId(), carId);
+        return ApiResponse.ok();
+    }
+
+    @GetMapping("/favorite")
+    public ApiResponse<List<Favorite>> listFavorites() {
+        return ApiResponse.ok(favoriteService.list(AuthUtil.getUserId()));
+    }
+
+    @PostMapping("/order")
+    public ApiResponse<Order> createOrder(@Valid @RequestBody OrderCreateRequest request) {
+        return ApiResponse.ok(orderService.create(AuthUtil.getUserId(), request));
+    }
+
+    @PostMapping("/order/pay")
+    public ApiResponse<Order> pay(@Valid @RequestBody PayRequest request) {
+        return ApiResponse.ok(orderService.pay(AuthUtil.getUserId(), request));
+    }
+
+    @PostMapping("/order/{orderId}/cancel")
+    public ApiResponse<Order> cancel(@PathVariable Long orderId) {
+        return ApiResponse.ok(orderService.cancel(AuthUtil.getUserId(), orderId));
+    }
+
+    @PostMapping("/order/{orderId}/return")
+    public ApiResponse<Order> returnCar(@PathVariable Long orderId) {
+        return ApiResponse.ok(orderService.returnCar(AuthUtil.getUserId(), orderId));
+    }
+
+    @GetMapping("/order")
+    public ApiResponse<List<Order>> myOrders(@RequestParam(required = false) String status) {
+        return ApiResponse.ok(orderService.listByUser(AuthUtil.getUserId(), status));
+    }
+
+    @GetMapping("/check-login")
+    public ApiResponse<Boolean> checkLogin() {
+        return ApiResponse.ok(StpUtil.isLogin());
+    }
+}

backend/src/main/java/com/car/dto/BalanceRequest.java

@@ -0,0 +1,10 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+@Data
+public class BalanceRequest {
+    @NotNull(message = "金额不能为空")
+    private Double amount;
+}

backend/src/main/java/com/car/dto/LoginRequest.java

@@ -0,0 +1,12 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Data;
+
+@Data
+public class LoginRequest {
+    @NotBlank(message = "用户名不能为空")
+    private String username;
+    @NotBlank(message = "密码不能为空")
+    private String password;
+}

backend/src/main/java/com/car/dto/OrderCreateRequest.java

@@ -0,0 +1,16 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+import java.time.LocalDate;
+
+@Data
+public class OrderCreateRequest {
+    @NotNull(message = "车辆不能为空")
+    private Long carId;
+    @NotNull(message = "开始日期不能为空")
+    private LocalDate startDate;
+    @NotNull(message = "结束日期不能为空")
+    private LocalDate endDate;
+}

backend/src/main/java/com/car/dto/PayRequest.java

@@ -0,0 +1,13 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+@Data
+public class PayRequest {
+    @NotNull(message = "订单不能为空")
+    private Long orderId;
+    @NotBlank(message = "支付方式不能为空")
+    private String payType;
+}

backend/src/main/java/com/car/dto/RealNameRequest.java

@@ -0,0 +1,14 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Data;
+
+@Data
+public class RealNameRequest {
+    @NotBlank(message = "真实姓名不能为空")
+    private String realName;
+    @NotBlank(message = "身份证号不能为空")
+    private String idNumber;
+    private String idFront;
+    private String idBack;
+}

backend/src/main/java/com/car/dto/RegisterRequest.java

@@ -0,0 +1,14 @@
+package com.car.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Data;
+
+@Data
+public class RegisterRequest {
+    @NotBlank(message = "用户名不能为空")
+    private String username;
+    @NotBlank(message = "密码不能为空")
+    private String password;
+    private String phone;
+    private String email;
+}

backend/src/main/java/com/car/entity/Car.java

@@ -0,0 +1,25 @@
+package com.car.entity;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class Car {
+    private Long id;
+    private String brand;
+    private String model;
+    private String plateNo;
+    private Double pricePerDay;
+    private Double deposit;
+    private String status;
+    private Boolean isSpecial;
+    private String images;
+    private String description;
+    private Integer seats;
+    private String transmission;
+    private String fuelType;
+    private Integer mileage;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}

backend/src/main/java/com/car/entity/Favorite.java

@@ -0,0 +1,13 @@
+package com.car.entity;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class Favorite {
+    private Long id;
+    private Long userId;
+    private Long carId;
+    private LocalDateTime createdAt;
+}

backend/src/main/java/com/car/entity/Order.java

@@ -0,0 +1,25 @@
+package com.car.entity;
+
+import lombok.Data;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+@Data
+public class Order {
+    private Long id;
+    private String orderNo;
+    private Long userId;
+    private Long carId;
+    private LocalDate startDate;
+    private LocalDate endDate;
+    private Integer days;
+    private Double pricePerDay;
+    private Double deposit;
+    private Double totalAmount;
+    private String status;
+    private String payType;
+    private LocalDateTime paidAt;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}

backend/src/main/java/com/car/entity/Payment.java

@@ -0,0 +1,15 @@
+package com.car.entity;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class Payment {
+    private Long id;
+    private Long orderId;
+    private Long userId;
+    private Double amount;
+    private String type;
+    private LocalDateTime createdAt;
+}

backend/src/main/java/com/car/entity/User.java

@@ -0,0 +1,24 @@
+package com.car.entity;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class User {
+    private Long id;
+    private String username;
+    private String password;
+    private String phone;
+    private String email;
+    private String role;
+    private String status;
+    private Double balance;
+    private String realNameStatus;
+    private String realName;
+    private String idNumber;
+    private String idFront;
+    private String idBack;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}

backend/src/main/java/com/car/mapper/CarMapper.java

@@ -0,0 +1,20 @@
+package com.car.mapper;
+
+import com.car.entity.Car;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+
+@Mapper
+public interface CarMapper {
+    Car findById(@Param("id") Long id);
+
+    List<Car> findAll(@Param("keyword") String keyword, @Param("isSpecial") Boolean isSpecial);
+
+    int insert(Car car);
+
+    int update(Car car);
+
+    int delete(@Param("id") Long id);
+}

backend/src/main/java/com/car/mapper/FavoriteMapper.java

@@ -0,0 +1,18 @@
+package com.car.mapper;
+
+import com.car.entity.Favorite;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+
+@Mapper
+public interface FavoriteMapper {
+    Favorite findByUserAndCar(@Param("userId") Long userId, @Param("carId") Long carId);
+
+    int insert(Favorite favorite);
+
+    int delete(@Param("id") Long id);
+
+    List<Favorite> findByUserId(@Param("userId") Long userId);
+}

backend/src/main/java/com/car/mapper/OrderMapper.java

@@ -0,0 +1,27 @@
+package com.car.mapper;
+
+import com.car.entity.Order;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Mapper
+public interface OrderMapper {
+    Order findById(@Param("id") Long id);
+
+    Order findByOrderNo(@Param("orderNo") String orderNo);
+
+    int insert(Order order);
+
+    int update(Order order);
+
+    List<Order> findByUserId(@Param("userId") Long userId, @Param("status") String status);
+
+    List<Order> findAll(@Param("status") String status);
+
+    int countOverlap(@Param("carId") Long carId,
+                     @Param("startDate") LocalDate startDate,
+                     @Param("endDate") LocalDate endDate);
+}

backend/src/main/java/com/car/mapper/PaymentMapper.java

@@ -0,0 +1,14 @@
+package com.car.mapper;
+
+import com.car.entity.Payment;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+
+@Mapper
+public interface PaymentMapper {
+    int insert(Payment payment);
+
+    List<Payment> findByUserId(@Param("userId") Long userId);
+}

backend/src/main/java/com/car/mapper/StatsMapper.java

@@ -0,0 +1,13 @@
+package com.car.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.Map;
+
+@Mapper
+public interface StatsMapper {
+    Map<String, Object> orderStats(@Param("status") String status);
+
+    Map<String, Object> financeStats();
+}

backend/src/main/java/com/car/mapper/UserMapper.java

@@ -0,0 +1,20 @@
+package com.car.mapper;
+
+import com.car.entity.User;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+
+@Mapper
+public interface UserMapper {
+    User findByUsername(@Param("username") String username);
+
+    User findById(@Param("id") Long id);
+
+    int insert(User user);
+
+    int update(User user);
+
+    List<User> findAll(@Param("keyword") String keyword);
+}

backend/src/main/java/com/car/service/CarService.java

@@ -0,0 +1,54 @@
+package com.car.service;
+
+import com.car.common.ApiException;
+import com.car.common.ErrorCode;
+import com.car.entity.Car;
+import com.car.mapper.CarMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class CarService {
+    private final CarMapper carMapper;
+
+    public CarService(CarMapper carMapper) {
+        this.carMapper = carMapper;
+    }
+
+    public List<Car> list(String keyword, Boolean isSpecial) {
+        return carMapper.findAll(keyword, isSpecial);
+    }
+
+    public Car get(Long id) {
+        Car car = carMapper.findById(id);
+        if (car == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "车辆不存在");
+        }
+        return car;
+    }
+
+    public Car create(Car car) {
+        if (car.getStatus() == null) {
+            car.setStatus("AVAILABLE");
+        }
+        if (car.getIsSpecial() == null) {
+            car.setIsSpecial(false);
+        }
+        carMapper.insert(car);
+        return car;
+    }
+
+    public Car update(Car car) {
+        Car db = carMapper.findById(car.getId());
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "车辆不存在");
+        }
+        carMapper.update(car);
+        return carMapper.findById(car.getId());
+    }
+
+    public void delete(Long id) {
+        carMapper.delete(id);
+    }
+}

backend/src/main/java/com/car/service/FavoriteService.java

@@ -0,0 +1,41 @@
+package com.car.service;
+
+import com.car.common.ApiException;
+import com.car.common.ErrorCode;
+import com.car.entity.Favorite;
+import com.car.mapper.FavoriteMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class FavoriteService {
+    private final FavoriteMapper favoriteMapper;
+
+    public FavoriteService(FavoriteMapper favoriteMapper) {
+        this.favoriteMapper = favoriteMapper;
+    }
+
+    public void add(Long userId, Long carId) {
+        Favorite existing = favoriteMapper.findByUserAndCar(userId, carId);
+        if (existing != null) {
+            throw new ApiException(ErrorCode.CONFLICT, "已收藏");
+        }
+        Favorite favorite = new Favorite();
+        favorite.setUserId(userId);
+        favorite.setCarId(carId);
+        favoriteMapper.insert(favorite);
+    }
+
+    public void remove(Long userId, Long carId) {
+        Favorite existing = favoriteMapper.findByUserAndCar(userId, carId);
+        if (existing == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "收藏不存在");
+        }
+        favoriteMapper.delete(existing.getId());
+    }
+
+    public List<Favorite> list(Long userId) {
+        return favoriteMapper.findByUserId(userId);
+    }
+}

backend/src/main/java/com/car/service/OrderService.java

@@ -0,0 +1,151 @@
+package com.car.service;
+
+import com.car.common.ApiException;
+import com.car.common.ErrorCode;
+import com.car.dto.OrderCreateRequest;
+import com.car.dto.PayRequest;
+import com.car.entity.Car;
+import com.car.entity.Order;
+import com.car.entity.Payment;
+import com.car.entity.User;
+import com.car.mapper.CarMapper;
+import com.car.mapper.OrderMapper;
+import com.car.mapper.PaymentMapper;
+import com.car.mapper.UserMapper;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+import java.util.List;
+import java.util.UUID;
+
+@Service
+public class OrderService {
+    private final OrderMapper orderMapper;
+    private final CarMapper carMapper;
+    private final UserMapper userMapper;
+    private final PaymentMapper paymentMapper;
+
+    public OrderService(OrderMapper orderMapper, CarMapper carMapper, UserMapper userMapper, PaymentMapper paymentMapper) {
+        this.orderMapper = orderMapper;
+        this.carMapper = carMapper;
+        this.userMapper = userMapper;
+        this.paymentMapper = paymentMapper;
+    }
+
+    public Order create(Long userId, OrderCreateRequest request) {
+        Car car = carMapper.findById(request.getCarId());
+        if (car == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "车辆不存在");
+        }
+        if (!"AVAILABLE".equals(car.getStatus())) {
+            throw new ApiException(ErrorCode.CONFLICT, "车辆不可租");
+        }
+        User user = userMapper.findById(userId);
+        if (user == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        if (!"APPROVED".equals(user.getRealNameStatus())) {
+            throw new ApiException(ErrorCode.FORBIDDEN, "请先完成实名认证审核");
+        }
+        LocalDate start = request.getStartDate();
+        LocalDate end = request.getEndDate();
+        if (end.isBefore(start)) {
+            throw new ApiException(ErrorCode.BAD_REQUEST, "结束日期不能早于开始日期");
+        }
+        int overlap = orderMapper.countOverlap(request.getCarId(), start, end);
+        if (overlap > 0) {
+            throw new ApiException(ErrorCode.CONFLICT, "该日期已被预订");
+        }
+        long days = ChronoUnit.DAYS.between(start, end) + 1;
+        Order order = new Order();
+        order.setOrderNo("ORD" + UUID.randomUUID().toString().replace("-", ""));
+        order.setUserId(userId);
+        order.setCarId(request.getCarId());
+        order.setStartDate(start);
+        order.setEndDate(end);
+        order.setDays((int) days);
+        order.setPricePerDay(car.getPricePerDay());
+        order.setDeposit(car.getDeposit());
+        order.setTotalAmount(car.getPricePerDay() * days + car.getDeposit());
+        order.setStatus("PENDING_PAY");
+        orderMapper.insert(order);
+        return orderMapper.findById(order.getId());
+    }
+
+    public Order pay(Long userId, PayRequest request) {
+        Order order = orderMapper.findById(request.getOrderId());
+        if (order == null || !order.getUserId().equals(userId)) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "订单不存在");
+        }
+        if (!"PENDING_PAY".equals(order.getStatus())) {
+            throw new ApiException(ErrorCode.CONFLICT, "订单无法支付");
+        }
+        if (!"BALANCE".equalsIgnoreCase(request.getPayType())) {
+            throw new ApiException(ErrorCode.BAD_REQUEST, "仅支持余额支付");
+        }
+        User user = userMapper.findById(userId);
+        if (user.getBalance() < order.getTotalAmount()) {
+            throw new ApiException(ErrorCode.CONFLICT, "余额不足");
+        }
+        user.setBalance(user.getBalance() - order.getTotalAmount());
+        userMapper.update(user);
+
+        Car car = carMapper.findById(order.getCarId());
+        car.setStatus("RENTED");
+        carMapper.update(car);
+
+        order.setStatus("RENTING");
+        order.setPayType("BALANCE");
+        order.setPaidAt(java.time.LocalDateTime.now());
+        orderMapper.update(order);
+
+        Payment payment = new Payment();
+        payment.setOrderId(order.getId());
+        payment.setUserId(userId);
+        payment.setAmount(order.getTotalAmount());
+        payment.setType("BALANCE");
+        paymentMapper.insert(payment);
+
+        return orderMapper.findById(order.getId());
+    }
+
+    public Order cancel(Long userId, Long orderId) {
+        Order order = orderMapper.findById(orderId);
+        if (order == null || !order.getUserId().equals(userId)) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "订单不存在");
+        }
+        if (!"PENDING_PAY".equals(order.getStatus())) {
+            throw new ApiException(ErrorCode.CONFLICT, "订单无法取消");
+        }
+        order.setStatus("CANCELLED");
+        orderMapper.update(order);
+        return orderMapper.findById(orderId);
+    }
+
+    public Order returnCar(Long userId, Long orderId) {
+        Order order = orderMapper.findById(orderId);
+        if (order == null || !order.getUserId().equals(userId)) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "订单不存在");
+        }
+        if (!"RENTING".equals(order.getStatus())) {
+            throw new ApiException(ErrorCode.CONFLICT, "订单无法归还");
+        }
+        order.setStatus("RETURNED");
+        orderMapper.update(order);
+
+        Car car = carMapper.findById(order.getCarId());
+        car.setStatus("AVAILABLE");
+        carMapper.update(car);
+
+        return orderMapper.findById(orderId);
+    }
+
+    public List<Order> listByUser(Long userId, String status) {
+        return orderMapper.findByUserId(userId, status);
+    }
+
+    public List<Order> listAll(String status) {
+        return orderMapper.findAll(status);
+    }
+}

backend/src/main/java/com/car/service/StatsService.java

@@ -0,0 +1,23 @@
+package com.car.service;
+
+import com.car.mapper.StatsMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.Map;
+
+@Service
+public class StatsService {
+    private final StatsMapper statsMapper;
+
+    public StatsService(StatsMapper statsMapper) {
+        this.statsMapper = statsMapper;
+    }
+
+    public Map<String, Object> orderStats() {
+        return statsMapper.orderStats(null);
+    }
+
+    public Map<String, Object> financeStats() {
+        return statsMapper.financeStats();
+    }
+}

backend/src/main/java/com/car/service/UserService.java

@@ -0,0 +1,126 @@
+package com.car.service;
+
+import com.car.common.ApiException;
+import com.car.common.ErrorCode;
+import com.car.dto.BalanceRequest;
+import com.car.dto.LoginRequest;
+import com.car.dto.RealNameRequest;
+import com.car.dto.RegisterRequest;
+import com.car.entity.User;
+import com.car.mapper.UserMapper;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class UserService {
+    private final UserMapper userMapper;
+    private final BCryptPasswordEncoder encoder;
+
+    public UserService(UserMapper userMapper, BCryptPasswordEncoder encoder) {
+        this.userMapper = userMapper;
+        this.encoder = encoder;
+    }
+
+    public User register(RegisterRequest request) {
+        User existing = userMapper.findByUsername(request.getUsername());
+        if (existing != null) {
+            throw new ApiException(ErrorCode.CONFLICT, "用户名已存在");
+        }
+        User user = new User();
+        user.setUsername(request.getUsername());
+        user.setPassword(encoder.encode(request.getPassword()));
+        user.setPhone(request.getPhone());
+        user.setEmail(request.getEmail());
+        user.setRole("USER");
+        user.setStatus("ACTIVE");
+        user.setBalance(0.0);
+        user.setRealNameStatus("NONE");
+        userMapper.insert(user);
+        user.setPassword(null);
+        return user;
+    }
+
+    public User login(LoginRequest request) {
+        User user = userMapper.findByUsername(request.getUsername());
+        if (user == null || !encoder.matches(request.getPassword(), user.getPassword())) {
+            throw new ApiException(ErrorCode.UNAUTHORIZED, "用户名或密码错误");
+        }
+        if (!"ACTIVE".equals(user.getStatus())) {
+            throw new ApiException(ErrorCode.FORBIDDEN, "账号已禁用");
+        }
+        return user;
+    }
+
+    public User getById(Long id) {
+        return userMapper.findById(id);
+    }
+
+    public User updateProfile(User input) {
+        User db = userMapper.findById(input.getId());
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        db.setPhone(input.getPhone());
+        db.setEmail(input.getEmail());
+        userMapper.update(db);
+        db.setPassword(null);
+        return db;
+    }
+
+    public User submitRealName(Long userId, RealNameRequest request) {
+        User db = userMapper.findById(userId);
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        db.setRealName(request.getRealName());
+        db.setIdNumber(request.getIdNumber());
+        db.setIdFront(request.getIdFront());
+        db.setIdBack(request.getIdBack());
+        db.setRealNameStatus("PENDING");
+        userMapper.update(db);
+        db.setPassword(null);
+        return db;
+    }
+
+    public User reviewRealName(Long userId, boolean approved) {
+        User db = userMapper.findById(userId);
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        db.setRealNameStatus(approved ? "APPROVED" : "REJECTED");
+        userMapper.update(db);
+        db.setPassword(null);
+        return db;
+    }
+
+    public User changeStatus(Long userId, String status) {
+        User db = userMapper.findById(userId);
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        db.setStatus(status);
+        userMapper.update(db);
+        db.setPassword(null);
+        return db;
+    }
+
+    public User addBalance(Long userId, BalanceRequest request) {
+        if (request.getAmount() <= 0) {
+            throw new ApiException(ErrorCode.BAD_REQUEST, "金额必须大于0");
+        }
+        User db = userMapper.findById(userId);
+        if (db == null) {
+            throw new ApiException(ErrorCode.NOT_FOUND, "用户不存在");
+        }
+        db.setBalance(db.getBalance() + request.getAmount());
+        userMapper.update(db);
+        db.setPassword(null);
+        return db;
+    }
+
+    public List<User> listUsers(String keyword) {
+        return userMapper.findAll(keyword);
+    }
+}

backend/src/main/java/com/car/util/AuthUtil.java

@@ -0,0 +1,9 @@
+package com.car.util;
+
+import cn.dev33.satoken.stp.StpUtil;
+
+public class AuthUtil {
+    public static Long getUserId() {
+        return Long.valueOf(StpUtil.getLoginId().toString());
+    }
+}

backend/src/main/resources/application.yml

@@ -0,0 +1,26 @@
+server:
+  port: 8080
+
+spring:
+  datasource:
+    url: jdbc:mysql://localhost:3306/car_rental?useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai
+    username: root
+    password: root
+  jackson:
+    date-format: yyyy-MM-dd HH:mm:ss
+    time-zone: Asia/Shanghai
+
+mybatis:
+  mapper-locations: classpath:mappers/*.xml
+  configuration:
+    map-underscore-to-camel-case: true
+
+sa-token:
+  token-name: Authorization
+  token-style: jwt
+  timeout: 86400
+  active-timeout: -1
+  is-concurrent: true
+  is-share: true
+  token-prefix: Bearer
+  is-log: false

backend/src/main/resources/mappers/CarMapper.xml

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.CarMapper">
+    <resultMap id="CarMap" type="com.car.entity.Car">
+        <id column="id" property="id"/>
+        <result column="brand" property="brand"/>
+        <result column="model" property="model"/>
+        <result column="plate_no" property="plateNo"/>
+        <result column="price_per_day" property="pricePerDay"/>
+        <result column="deposit" property="deposit"/>
+        <result column="status" property="status"/>
+        <result column="is_special" property="isSpecial"/>
+        <result column="images" property="images"/>
+        <result column="description" property="description"/>
+        <result column="seats" property="seats"/>
+        <result column="transmission" property="transmission"/>
+        <result column="fuel_type" property="fuelType"/>
+        <result column="mileage" property="mileage"/>
+        <result column="created_at" property="createdAt"/>
+        <result column="updated_at" property="updatedAt"/>
+    </resultMap>
+
+    <select id="findById" resultMap="CarMap">
+        select * from cars where id = #{id}
+    </select>
+
+    <select id="findAll" resultMap="CarMap">
+        select * from cars
+        <where>
+            <if test="keyword != null and keyword != ''">
+                (brand like concat('%', #{keyword}, '%')
+                or model like concat('%', #{keyword}, '%')
+                or plate_no like concat('%', #{keyword}, '%'))
+            </if>
+            <if test="isSpecial != null">
+                and is_special = #{isSpecial}
+            </if>
+        </where>
+        order by id desc
+    </select>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+        insert into cars(brand, model, plate_no, price_per_day, deposit, status, is_special, images, description, seats, transmission, fuel_type, mileage, created_at, updated_at)
+        values (#{brand}, #{model}, #{plateNo}, #{pricePerDay}, #{deposit}, #{status}, #{isSpecial}, #{images}, #{description}, #{seats}, #{transmission}, #{fuelType}, #{mileage}, now(), now())
+    </insert>
+
+    <update id="update">
+        update cars
+        set brand = #{brand},
+            model = #{model},
+            plate_no = #{plateNo},
+            price_per_day = #{pricePerDay},
+            deposit = #{deposit},
+            status = #{status},
+            is_special = #{isSpecial},
+            images = #{images},
+            description = #{description},
+            seats = #{seats},
+            transmission = #{transmission},
+            fuel_type = #{fuelType},
+            mileage = #{mileage},
+            updated_at = now()
+        where id = #{id}
+    </update>
+
+    <delete id="delete">
+        delete from cars where id = #{id}
+    </delete>
+</mapper>

backend/src/main/resources/mappers/FavoriteMapper.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.FavoriteMapper">
+    <resultMap id="FavoriteMap" type="com.car.entity.Favorite">
+        <id column="id" property="id"/>
+        <result column="user_id" property="userId"/>
+        <result column="car_id" property="carId"/>
+        <result column="created_at" property="createdAt"/>
+    </resultMap>
+
+    <select id="findByUserAndCar" resultMap="FavoriteMap">
+        select * from favorites where user_id = #{userId} and car_id = #{carId} limit 1
+    </select>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+        insert into favorites(user_id, car_id, created_at)
+        values (#{userId}, #{carId}, now())
+    </insert>
+
+    <delete id="delete">
+        delete from favorites where id = #{id}
+    </delete>
+
+    <select id="findByUserId" resultMap="FavoriteMap">
+        select * from favorites where user_id = #{userId} order by id desc
+    </select>
+</mapper>

backend/src/main/resources/mappers/OrderMapper.xml

@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.OrderMapper">
+    <resultMap id="OrderMap" type="com.car.entity.Order">
+        <id column="id" property="id"/>
+        <result column="order_no" property="orderNo"/>
+        <result column="user_id" property="userId"/>
+        <result column="car_id" property="carId"/>
+        <result column="start_date" property="startDate"/>
+        <result column="end_date" property="endDate"/>
+        <result column="days" property="days"/>
+        <result column="price_per_day" property="pricePerDay"/>
+        <result column="deposit" property="deposit"/>
+        <result column="total_amount" property="totalAmount"/>
+        <result column="status" property="status"/>
+        <result column="pay_type" property="payType"/>
+        <result column="paid_at" property="paidAt"/>
+        <result column="created_at" property="createdAt"/>
+        <result column="updated_at" property="updatedAt"/>
+    </resultMap>
+
+    <select id="findById" resultMap="OrderMap">
+        select * from orders where id = #{id}
+    </select>
+
+    <select id="findByOrderNo" resultMap="OrderMap">
+        select * from orders where order_no = #{orderNo}
+    </select>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+        insert into orders(order_no, user_id, car_id, start_date, end_date, days,
+                           price_per_day, deposit, total_amount, status, pay_type, paid_at, created_at, updated_at)
+        values (#{orderNo}, #{userId}, #{carId}, #{startDate}, #{endDate}, #{days},
+                #{pricePerDay}, #{deposit}, #{totalAmount}, #{status}, #{payType}, #{paidAt}, now(), now())
+    </insert>
+
+    <update id="update">
+        update orders
+        set start_date = #{startDate},
+            end_date = #{endDate},
+            days = #{days},
+            price_per_day = #{pricePerDay},
+            deposit = #{deposit},
+            total_amount = #{totalAmount},
+            status = #{status},
+            pay_type = #{payType},
+            paid_at = #{paidAt},
+            updated_at = now()
+        where id = #{id}
+    </update>
+
+    <select id="findByUserId" resultMap="OrderMap">
+        select * from orders
+        <where>
+            user_id = #{userId}
+            <if test="status != null and status != ''">
+                and status = #{status}
+            </if>
+        </where>
+        order by id desc
+    </select>
+
+    <select id="findAll" resultMap="OrderMap">
+        select * from orders
+        <where>
+            <if test="status != null and status != ''">
+                status = #{status}
+            </if>
+        </where>
+        order by id desc
+    </select>
+
+    <select id="countOverlap" resultType="int">
+        select count(1) from orders
+        where car_id = #{carId}
+          and status in ('PAID', 'RENTING')
+          and not (end_date &lt; #{startDate} or start_date &gt; #{endDate})
+    </select>
+</mapper>

backend/src/main/resources/mappers/PaymentMapper.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.PaymentMapper">
+    <resultMap id="PaymentMap" type="com.car.entity.Payment">
+        <id column="id" property="id"/>
+        <result column="order_id" property="orderId"/>
+        <result column="user_id" property="userId"/>
+        <result column="amount" property="amount"/>
+        <result column="type" property="type"/>
+        <result column="created_at" property="createdAt"/>
+    </resultMap>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+        insert into payments(order_id, user_id, amount, type, created_at)
+        values (#{orderId}, #{userId}, #{amount}, #{type}, now())
+    </insert>
+
+    <select id="findByUserId" resultMap="PaymentMap">
+        select * from payments where user_id = #{userId} order by id desc
+    </select>
+</mapper>

backend/src/main/resources/mappers/StatsMapper.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.StatsMapper">
+    <select id="orderStats" resultType="map">
+        select count(1) as total,
+               sum(case when status = 'RENTING' then 1 else 0 end) as renting,
+               sum(case when status = 'RETURNED' then 1 else 0 end) as returned,
+               sum(case when status = 'PENDING_PAY' then 1 else 0 end) as pendingPay
+        from orders
+    </select>
+
+    <select id="financeStats" resultType="map">
+        select ifnull(sum(total_amount), 0) as income,
+               ifnull(sum(deposit), 0) as deposit,
+               count(1) as orderCount
+        from orders
+        where status in ('PAID', 'RENTING', 'RETURNED')
+    </select>
+</mapper>

backend/src/main/resources/mappers/UserMapper.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.car.mapper.UserMapper">
+    <resultMap id="UserMap" type="com.car.entity.User">
+        <id column="id" property="id"/>
+        <result column="username" property="username"/>
+        <result column="password" property="password"/>
+        <result column="phone" property="phone"/>
+        <result column="email" property="email"/>
+        <result column="role" property="role"/>
+        <result column="status" property="status"/>
+        <result column="balance" property="balance"/>
+        <result column="real_name_status" property="realNameStatus"/>
+        <result column="real_name" property="realName"/>
+        <result column="id_number" property="idNumber"/>
+        <result column="id_front" property="idFront"/>
+        <result column="id_back" property="idBack"/>
+        <result column="created_at" property="createdAt"/>
+        <result column="updated_at" property="updatedAt"/>
+    </resultMap>
+
+    <select id="findByUsername" resultMap="UserMap">
+        select * from users where username = #{username} limit 1
+    </select>
+
+    <select id="findById" resultMap="UserMap">
+        select * from users where id = #{id}
+    </select>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+        insert into users(username, password, phone, email, role, status, balance, real_name_status, created_at, updated_at)
+        values (#{username}, #{password}, #{phone}, #{email}, #{role}, #{status}, #{balance}, #{realNameStatus}, now(), now())
+    </insert>
+
+    <update id="update">
+        update users
+        set password = #{password},
+            phone = #{phone},
+            email = #{email},
+            role = #{role},
+            status = #{status},
+            balance = #{balance},
+            real_name_status = #{realNameStatus},
+            real_name = #{realName},
+            id_number = #{idNumber},
+            id_front = #{idFront},
+            id_back = #{idBack},
+            updated_at = now()
+        where id = #{id}
+    </update>
+
+    <select id="findAll" resultMap="UserMap">
+        select * from users
+        <where>
+            <if test="keyword != null and keyword != ''">
+                (username like concat('%', #{keyword}, '%')
+                or phone like concat('%', #{keyword}, '%')
+                or email like concat('%', #{keyword}, '%'))
+            </if>
+        </where>
+        order by id desc
+    </select>
+</mapper>