全网最详细的SpringBoot学习-day08

SpringBoot整合MyBatis

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官方文档：http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/

Maven仓库地址：Maven Repository: org.mybatis.spring.boot » mybatis-spring-boot-starter » 2.1.4 (mvnrepository.com)

Mybatis开发文档地址：mybatis – MyBatis 3 | 简介

整合测试

1. 导入 MyBatis 所需要的依赖

   
   <dependency>
       <groupId>org.mybatis.spring.bootgroupId>
       <artifactId>mybatis-spring-boot-starterartifactId>
       <version>2.1.4version>
   dependency>
   

2. 配置数据库连接信息

   spring.datasource.username=root
   spring.datasource.password=123456
   spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=utf8
   spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
   
   #mybatis
   mybatis.type-aliases-package=com.sxau.pojo
   mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
   
   

3. 测试数据库是否连接成功！

   

4. 创建实体类，导入 Lombok！

   User.java

   package com.sxau.pojo;
   
   import lombok.AllArgsConstructor;
   import lombok.Data;
   import lombok.NoArgsConstructor;
   
   @Data
   @AllArgsConstructor
   @NoArgsConstructor
   public class User {
       private int id;
       private String name;
       private String pwd;
   }
   
   

5. 创建mapper目录以及对应的 Mapper 接口

   UserMapper.java

   package com.sxau.mapper;
   
   import com.sxau.pojo.User;
   import org.apache.ibatis.annotations.Mapper;
   import org.springframework.stereotype.Repository;
   
   import java.util.List;
   
   @Mapper //注解表示是一个mybatis的mapper类
   @Repository
   public interface UserMapper {
       List<User> queryUserList();
   
       User quertUserById(int id);
   
       int addUser(User user);
   
       int updateUser(User user);
   
       int deleteUser(int id);
   }
   
   

6. 对应的Mapper映射文件

   UserMapper.xml

   
   DOCTYPE mapper
           PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
           "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
   <mapper namespace="com.sxau.mapper.UserMapper">
       <select id="queryUserList" resultType="User">
           select * from mybatis.user
       select>
   
       <select id="quertUserById" parameterType="int" resultType="User">
           select * from mybatis.user where id=#{id}
       select>
       
       <insert id="addUser" parameterType="User">
           insert into mybatis.user (id,name,pwd) values (#{id},#{name},#{pwd})
       insert>
   
       <update id="updateUser" parameterType="User">
           update mybatis.user set name=#{name},pwd=#{pwd} where id=#{id}
       update>
   
       <delete id="deleteUser" parameterType="int">
           delete from mybatis.user where id=#{id}
       delete>
   mapper>
   

7. maven配置资源过滤问题

   <resources>
       <resource>
           <directory>src/main/javadirectory>
           <includes>
               <include>**/*.xmlinclude>
           includes>
           <filtering>truefiltering>
       resource>
   resources>
   

   

8. 编写部门的 UserController 进行测试！

   package com.sxau.controller;
   
   import com.sxau.mapper.UserMapper;
   import com.sxau.pojo.User;
   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;
   
   @RestController
   public class UserController {
       @Autowired
       private UserMapper userMapper;
       @GetMapping("/queryUserList")
       public List<User> queryUserList(){
           List<User> users = userMapper.queryUserList();
           return users;
       }
   
       @GetMapping("/quertUserById")
       public User quertUserById(@PathVariable("id")int id){
           User user = userMapper.quertUserById(1);
           return user;
       }
   
       @GetMapping("/addUser")
       public String addUser(){
           userMapper.addUser(new User(10,"阿峰","1234"));
           return "addUser,ok";
       }
   
       @GetMapping("/updateUser")
       public String updateUser(){
           userMapper.updateUser(new User(10,"阿哥哥","1111111"));
           return "updateUser,ok";
       }
   
       @GetMapping("/deleteUser")
       public String deleteUser(@PathVariable("id")int id){
           userMapper.deleteUser(10);
           return "deleteUser,ok";
       }
   }
   

启动项目访问进行测试！

上面测试接口没有问题，说明已经成功读取到数据！