如何使用java springboot 整合mybatis/mybatis-plus

你可以按照以下步骤来使用Java Spring Boot整合MyBatis/MyBatis-Plus：

1. 添加MyBatis/MyBatis-Plus依赖

在pom.xml文件中添加以下依赖：

<!-- MyBatis -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>

<!-- MyBatis-Plus -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.0</version>
</dependency>

2. 配置数据源

在application.properties或application.yml文件中配置数据源信息，例如：

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatis_plus?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: root

3. 配置MyBatis/MyBatis-Plus

在配置类中添加以下注解：

@Configuration
@MapperScan("com.example.demo.mapper")
public class MybatisPlusConfig {
}

其中com.example.demo.mapper为你的Mapper包路径。

4. 编写Mapper接口和XML文件

编写Mapper接口和XML文件，例如：

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

<?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">
    <resultMap id="BaseResultMap" type="com.example.demo.entity.User">
        <id column="id" property="id" />
        <result column="name" property="name" />
        <result column="age" property="age" />
        <result column="email" property="email" />
    </resultMap>

    <select id="selectById" resultMap="BaseResultMap">
        select * from user where id = #{id}
    </select>

    <select id="selectList" resultMap="BaseResultMap">
        select * from user
    </select>

    <insert id="insert" parameterType="com.example.demo.entity.User">
        insert into user (name, age, email) values (#{name}, #{age}, #{email})
    </insert>

    <update id="updateById" parameterType="com.example.demo.entity.User">
        update user set name = #{name}, age = #{age}, email = #{email} where id = #{id}
    </update>

    <delete id="deleteById" parameterType="java.lang.Long">
        delete from user where id = #{id}
    </delete>
</mapper>

5. 编写Service和Controller

编写Service和Controller，例如：

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping("/{id}")
    public User getUserById(@PathVariable Long id) {
        return userService.getById(id);
    }

    @GetMapping("/")
    public List<User> getUserList() {
        return userService.list();
    }

    @PostMapping("/")
    public boolean addUser(@RequestBody User user) {
        return userService.save(user);
    }

    @PutMapping("/")
    public boolean updateUser(@RequestBody User user) {
        return userService.updateById(user);
    }

    @DeleteMapping("/{id}")
    public boolean deleteUserById(@PathVariable Long id) {
        return userService.removeById(id);
    }
}

6. 运行程序

运行程序，访问http://localhost:8080/user/即可进行测试。

以上就是使用Java Spring Boot整合MyBatis/MyBatis-Plus的步骤，希望对你有帮助。