整合mybatis-plus必须避开的大坑

官网没有整合完整的例子，自己整合起来一通乱试，终于搞定，现在记录一下：

工程图：

1，去官网上找到导入maven的依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.5.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version><baomidou.version>3.1.1</baomidou.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.0.1</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>${baomidou.version}</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins><resources><resource><directory>src/main/resources</directory><filtering>true</filtering></resource><resource><!-- xml放在java目录下--><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource></resources></build>
</project>

2，User类

package com.example.demo.entity;import com.baomidou.mybatisplus.annotation.*;
import lombok.Data;import java.io.Serializable;
import java.util.Date;/*** <p>* 管理员表* </p>*/
@TableName("sys_user")
@Data
public class User implements Serializable {private static final long serialVersionUID = 1L;/*** 主键id*/@TableId(value = "USER_ID", type = IdType.ID_WORKER)private Long userId;/*** 头像*/@TableField("AVATAR")private String avatar;/*** 账号*/@TableField("ACCOUNT")private String account;/*** 密码*/@TableField("PASSWORD")private String password;/*** md5密码盐*/@TableField("SALT")private String salt;/*** 名字*/@TableField("NAME")private String name;/*** 生日*/@TableField("BIRTHDAY")private Date birthday;/*** 性别(字典)*/@TableField("SEX")private String sex;/*** 电子邮件*/@TableField("EMAIL")private String email;/*** 电话*/@TableField("PHONE")private String phone;/*** 角色id(多个逗号隔开)*/@TableField("ROLE_ID")private String roleId;/*** 部门id(多个逗号隔开)*/@TableField("DEPT_ID")private Long deptId;/*** 状态(字典)*/@TableField("STATUS")private String status;/*** 创建时间*/@TableField(value = "CREATE_TIME", fill = FieldFill.INSERT)private Date createTime;/*** 创建人*/@TableField(value = "CREATE_USER", fill = FieldFill.INSERT)private Long createUser;/*** 更新时间*/@TableField(value = "UPDATE_TIME", fill = FieldFill.UPDATE)private Date updateTime;/*** 更新人*/@TableField(value = "UPDATE_USER", fill = FieldFill.UPDATE)private Long updateUser;/*** 乐观锁*/@TableField("VERSION")private Integer version;}

3，UserMapper.xml

<?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"><!-- 通用查询映射结果 --><resultMap id="BaseResultMap" type="com.example.demo.entity.User"><id column="USER_ID" property="userId"/><result column="AVATAR" property="avatar"/><result column="ACCOUNT" property="account"/><result column="PASSWORD" property="password"/><result column="SALT" property="salt"/><result column="NAME" property="name"/><result column="BIRTHDAY" property="birthday"/><result column="SEX" property="sex"/><result column="EMAIL" property="email"/><result column="PHONE" property="phone"/><result column="ROLE_ID" property="roleId"/><result column="DEPT_ID" property="deptId"/><result column="STATUS" property="status"/><result column="CREATE_TIME" property="createTime"/><result column="CREATE_USER" property="createUser"/><result column="UPDATE_TIME" property="updateTime"/><result column="UPDATE_USER" property="updateUser"/><result column="VERSION" property="version"/></resultMap><sql id="Base_Column_List_With_Pwd">USER_ID AS userId, AVATAR AS avatar, ACCOUNT AS account, PASSWORD AS password,SALT AS salt, NAME AS name, BIRTHDAY AS birthday, SEX AS sex, EMAIL AS email, PHONE AS phone,ROLE_ID AS roleId, DEPT_ID AS deptId, STATUS AS status, CREATE_TIME AS createTime, CREATE_USER AS createUser,UPDATE_TIME AS updateTime, UPDATE_USER AS updateUser, VERSION AS version</sql><select id="getByAccount" resultType="com.example.demo.entity.User">select<include refid="Base_Column_List_With_Pwd"/>from sys_user where ACCOUNT = #{account} and STATUS != 'DELETED'</select></mapper>

4,UserMapper

package com.example.demo.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;@Mapper
public interface UserMapper extends BaseMapper<User> {/*** 通过账号获取用户*/User getByAccount(@Param("account") String account);}

5,DemoApplication

package com.example.demo;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
@MapperScan("com.example.demo.mapper")
public class DemoApplication {public static void main(String[] args) {SpringApplication.run(DemoApplication.class, args);}}

6,application.properties

server.port=9999#mysql
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/shirodemo?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=CTT
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#mybatis-plus
mybatis-plus.mapper-locations=classpath*:com/example/demo/mapper/**/*.xml
mybatis-plus.type-aliases-package=com.example.demo.entity

7,sql

CREATE TABLE `sys_user`  (`USER_ID` bigint(20) NOT NULL COMMENT '主键id',`AVATAR` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '头像',`ACCOUNT` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '账号',`PASSWORD` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '密码',`SALT` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT 'md5密码盐',`NAME` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '名字',`BIRTHDAY` datetime(0) DEFAULT NULL COMMENT '生日',`SEX` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '性别(字典)',`EMAIL` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '电子邮件',`PHONE` varchar(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '电话',`ROLE_ID` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '角色id(多个逗号隔开)',`DEPT_ID` bigint(20) DEFAULT NULL COMMENT '部门id(多个逗号隔开)',`STATUS` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '状态(字典)',`CREATE_TIME` datetime(0) DEFAULT NULL COMMENT '创建时间',`CREATE_USER` bigint(20) DEFAULT NULL COMMENT '创建人',`UPDATE_TIME` datetime(0) DEFAULT NULL COMMENT '更新时间',`UPDATE_USER` bigint(20) DEFAULT NULL COMMENT '更新人',`VERSION` int(11) DEFAULT NULL COMMENT '乐观锁',PRIMARY KEY (`USER_ID`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '管理员表' ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of sys_user
-- ----------------------------
INSERT INTO `sys_user` VALUES (1, '1', 'admin', '1d6b1208c7d151d335790276a18e3d99', 'q6taw', 'liwl', '2019-01-16 00:00:00', 'M', '131lllove@qq.com', '18200000000', '1', 27, 'ENABLE', '2016-01-29 08:49:53', NULL, '2018-12-28 22:52:24', 24, 25);

8,最后调用test，执行搞定

package com.pt.invoice;import com.pt.invoice.modular.system.entity.User;
import com.pt.invoice.modular.system.mapper.UserMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;import java.util.List;@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {@Autowiredprivate UserMapper userMapper;@Testpublic void testSelect() {System.out.println(("----- selectAll method test ------"));List<User> userList = userMapper.selectList(null);userList.forEach(System.out::println);User user=userMapper.getByAccount("admin");System.out.println("用户admin======"+user);}}

gitee地址：https://gitee.com/TimeToSayGoodbye/MyBatis-Plus-Test.git

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