目录前期工作1.导入mybatis整合依赖2.连接数据库3.连接完数据库就去applicaton.yml配置一下数据库开始整合1.编写与数据库对应的实体类2.编写mapper3.编写mapper.xml文件4.编写controller5.进行测试
前期工作
1.导入mybatis整合依赖
<!-- mybatis整合 --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.4</version> </dependency>
2.连接数据库
3.连接完数据库就去applicaton.yml配置一下数据库
spring: datasource: username: root password: 123456 url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8 driver-class-name: com.mysql.cj.jdbc.Driver
开始整合
1.编写与数据库对应的实体类
package com.example.pojo;import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;@Data@AllArgsConstructor@NoArgsConstructorpublic class User { private Integer id; private String name; private String pwd;}
为了偷懒，导入了lombok
<!-- lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency>
2.编写mapper
package com.example.mapper;import com.example.pojo.User;import org.apache.ibatis.annotations.Mapper;import org.springframework.stereotype.Repository;import java.util.List;@Mapper@Repositorypublic interface UserMapper { //查询用户的全部信息 List<User> getUserList(); //select 找出id=1的用户 User getUserById(int id); //insert 增加一个用户 int insertUser(User user); //delete 删除id=4的用户 int deleteUser(int id); //update 将id=2的用户名字改为小龙 int updateUser(User user);}
3.编写mapper.xml文件
<?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.mapper.UserMapper"> <select id="getUserList" resultType="user"> select * from mybatis.user </select> <select id="getUserById" resultType="user" parameterType="int"> select * from mybatis.user where id = #{id}; </select> <insert id="insertUser" parameterType="user"> insert into mybatis.user (id, name, pwd) values (#{id}, #{name}, #{pwd}); </insert> <delete id="deleteUser" parameterType="int"> delete from mybatis.user where id = #{id}; </delete> <update id="updateUser" parameterType="user"> update mybatis.user set name = #{name}, pwd = #{pwd} where id = #{id}; </update></mapper>
这里我们用了别名而且我们把这个mapper.xml文件放在了resources目录下，所以我们要去application.yml配置一下
mybatis: type-aliases-package: com.example.pojo mapper-locations: classpath:mybatis/mapper/*.xml
mapper.xml文件编写的位置：
4.编写controller
package com.example.controller;import com.example.mapper.UserMapper;import com.example.pojo.User;import org.apache.ibatis.annotations.Param;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestControllerpublic class UserController { @Autowired private UserMapper userMapper; @GetMapping("/getUserList") public List<User> getUserList(){ return userMapper.getUserList(); } @GetMapping("/getUserById/{id}") public User getUserById(@PathVariable("id") int id){ return userMapper.getUserById(id); } @GetMapping("/insertUser") public String insertUser(){ userMapper.insertUser(new User(5,"xiaoming","111")); return "ok"; } @GetMapping("/deleteUser") public String deleteUser(){ userMapper.deleteUser(5); return "ok"; } @GetMapping("/updateUser") public String updateUser(){ userMapper.updateUser(new User(5,"xx","111")); return "ok"; }}
5.进行测试
以上就是Springboot整合mybatis的步骤的详细内容，更多关于Springboot整合mybatis的资料请关注其它相关文章！
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