SpringBoot使用MyBatis的XML文件进行SQL语句编写

<dependencies>
    <!-- Spring Boot Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <!-- MyBatis Starter -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>3.0.3</version>
    </dependency>

    <!-- MySQL 驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.33</version>
    </dependency>
</dependencies>

spring.datasource.url=jdbc:mysql://localhost:3306/demo_db?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

mybatis.mapper-locations=classpath:mapper/**/*.xml
mybatis.type-aliases-package=com.example.demo.model

package com.example.demo.model;

public class User {
    private Long id;
    private String name;
    private String email;

    // Getter and Setter
}

package com.example.demo.mapper;

import com.example.demo.model.User;
import java.util.List;

public interface UserMapper {
    List<User> getAllUsers();
    User getUserById(Long id);
    void insertUser(User user);
    void updateUser(User user);
    void deleteUserById(Long id);
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.example.demo.mapper.UserMapper">

    <!-- 查询所有用户 -->
    <select id="getAllUsers" resultType="User">
        SELECT * FROM users
    </select>

    <!-- 根据ID查询用户 -->
    <select id="getUserById" parameterType="long" resultType="User">
        SELECT * FROM users WHERE id = #{id}
    </select>

    <!-- 插入用户 -->
    <insert id="insertUser">
        INSERT INTO users (name, email)
        VALUES (#{name}, #{email})
    </insert>

    <!-- 更新用户 -->
    <update id="updateUser">
        UPDATE users
        SET name = #{name}, email = #{email}
        WHERE id = #{id}
    </update>

    <!-- 删除用户 -->
    <delete id="deleteUserById">
        DELETE FROM users WHERE id = #{id}
    </delete>

</mapper>

List<User> searchUsers(@Param("name") String name, @Param("email") String email);

<select id="searchUsers" resultType="User">
    SELECT * FROM users
    <where>
        <if test="name != null and name != ''">
            AND name LIKE CONCAT('%', #{name}, '%')
        </if>
        <if test="email != null and email != ''">
            AND email LIKE CONCAT('%', #{email}, '%')
        </if>
    </where>
</select>

<insert id="batchInsert">
    INSERT INTO users (name, email)
    VALUES
    <foreach collection="list" item="user" separator=",">
        (#{user.name}, #{user.email})
    </foreach>
</insert>

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public void printAllUsers() {
        List<User> users = userMapper.getAllUsers();
        users.forEach(System.out::println);
    }
}

@RestController
@RequestMapping("/users")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping
    public void getUsers() {
        userService.printAllUsers();
    }
}

logging:
  level:
    com.example.demo.mapper: debug