MybatisPlus，springboot16 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/2.1.4

16.1、整合測試
1、導入 MyBatis 所需要的依賴

<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（不變）

spring:datasource:username: rootpassword: 123456#?serverTimezone=UTC解決時區的報錯url: jdbc:mysql://localhost:3306/springboot?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8driver-class-name: com.mysql.cj.jdbc.Drivertype: com.alibaba.druid.pool.DruidDataSource#Spring Boot 默認是不注入這些屬性值的，需要自己綁定#druid 數據源專有配置initialSize: 5minIdle: 5maxActive: 20maxWait: 60000timeBetweenEvictionRunsMillis: 60000minEvictableIdleTimeMillis: 300000validationQuery: SELECT 1 FROM DUALtestWhileIdle: truetestOnBorrow: falsetestOnReturn: falsepoolPreparedStatements: true#配置監控統計攔截的filters，stat:監控統計、log4j：日志記錄、wall：防御sql注入#如果允許時報錯  java.lang.ClassNotFoundException: org.apache.log4j.Priority#則導入 log4j 依賴即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4jfilters: stat,wall,log4jmaxPoolPreparedStatementPerConnectionSize: 20useGlobalDataSourceStat: trueconnectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

MybatisPlus，3、測試數據庫是否連接成功！

4、創建實體類，導入 Lombok！

lombok的maven坐標

<dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.16.12</version>
</dependency>

package com.zy.anquan.pojo;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@AllArgsConstructor
@NoArgsConstructor
//@Data 生成getter,setter ,toString等函數
// @NoArgsConstructor 生成無參構造函數
// @AllArgsConstructor //生成全參數構造函數
public class User {private int id;private String name;private String pwd;
}

5、創建mapper目錄以及對應的 Mapper 接口

//@Mapper : 表示本類是一個 MyBatis 的 Mapper
@Mapper
@Repository
public interface UserMapper {List<User> queryUserList();User queryUserById(int id);int addUser(User user);int updateUser(User user);int deleteUser(int id);}

springboot2。6、對應的Mapper映射文件

<?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.DepartmentMapper"><select id="queryUserList" resultType="User">select * from user;</select><select id="queryUserById" resultType="User" parameterType="int">select * from user where id = #{id};</select><insert id="addUser" parameterType="User">insert into user(id,name,pwd) values(#{id},#{name},#{pwd});</insert><update id="updateUser" parameterType="User">update user set name=#{name},pwd=#{pwd} where id=#{id};</update><delete id="deleteUser" parameterType="int">delete from 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>

或者 在yaml中配置

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

8、編寫Controller 進行測試！

@RestController
public class UserController {
@Autowiredprivate UserMapper userMapper;@GetMapping("/queryUserList")public List<User>  queryUserList(){List<User> users = userMapper.queryUserList();for (User user : users) {System.out.println(user);}return users;}@GetMapping("/addUser")public String  addUser(){userMapper.addUser(new User(6,"阿毛","123456"));return "ok";}@GetMapping("/updateUser")public String  udpateUser(){userMapper.updateUser(new User(6,"阿毛","111111"));return "ok";}@GetMapping("/deleteUser")public String  deleteUser(){userMapper.deleteUser(5);return "ok";}
}

springboot版本、啟動項目訪問進行測試！