整合MyBatis

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

Maven倉庫地址：https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter/2.1.1

整合測試

1、導入 MyBatis 所需要的依賴

<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter --> <dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.1.4</version> </dependency>

2、配置數據庫連接信息

spring:datasource:username: rootpassword: 123456#?serverTimezone=UTC解決時區的報錯url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8driver-class-name: com.mysql.cj.jdbc.Driver

3、測試數據庫是否連接成功！

<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId> </dependency>

4、創建實體類，導入 Lombok！

Department.java

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

5、創建mapper目錄以及對應的 Mapper 接口

UserMapper.java

package com.kuang.mapper;//@Mapper : 表示本類是一個 MyBatis 的 Mapperimport com.kuang.pojo.User; import org.apache.ibatis.annotations.Mapper; import org.springframework.stereotype.Repository;import java.util.List; @Mapper @Repository public interface UserMapper {List<User> queryUserList();User queryUserBuId(int id);int addUser(User user);int updateUser(User user);int deleteUser(int id); }

配置

mybatis:type-aliases-package: com.kuang.pojomapper-locations: classpath:mybatis/mapper/*.xml

6、對應的Mapper映射文件

USerMapper.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.kuang.mapper.UserMapper"><select id="queryUserList" resultType="User">select * from mybatis.user</select><select id="queryUserById" 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配置資源過濾問題

<resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes><filtering>true</filtering></resource> </resources>

8、編寫部門的 USeController 進行測試！

package com.kuang.controller;import com.kuang.mapper.UserMapper; import com.kuang.pojo.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestController public class UserController {@Autowiredprivate UserMapper userMapper;@GetMapping("/queryUserList")public List<User> queryUserList(){List<User> userList=userMapper.queryUserList();for (User user : userList) {System.out.println(user);}return userList;}@GetMapping("/1")public String getint(){return "asdfdas";}}

啟動項目訪問進行測試！

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