[Java知识库]Mybatis-Plus的MybatisX插件

MybatisX插件

1、安装

先在resources包下创建名为mapper的包，然后创建mybatis-mapper.xml文件，命名为UserMapper(这个mybatis-mapper文件是自定义的，在前面的博客有讲解)


这个小鸟点开有惊喜(会自动跳转)

<?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">

</mapper>

代码快速生成

创建新工程

1、导入依赖

<?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 https://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>2.6.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>MybatisX</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>MybatisX</name>
    <description>MybatisX</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--mybatis-plus启动器-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <!--lombok用于简化实体类的开发-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、配置yml文件

spring:
  #配置数据源的信息
  datasource:
    #配置数据源的类型
    type:
    #配置数据库的各个信息
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatis_plus?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8
    username: root
    password: '011012'

3、操作流程

在idea的最右边

右键t_user

点击第一个


然后就发现自动都创建好了

4、快速crud

package com.example.mapper;
import org.apache.ibatis.annotations.Param;

import com.example.pojo.User;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;

/**
* @author yingcai
* @description 针对表【t_user】的数据库操作Mapper
* @createDate 2022-03-21 19:35:32
* @Entity com.example.pojo.User
*/
public interface UserMapper extends BaseMapper<User> {

    int insertSelective(User user);

    int deleteByUidAndAge(@Param("uid") Long uid, @Param("age") Integer age); 
}

在UserMapper下进行crud
比如int insertSelective(User user);就是打insertSelective在同时按AIt和Enter键，选择