MyBatis-Plus代码生成器简单使用

准备数据库名字mp_generator，这里只是简单演示，我就只建1张表

CREATE TABLE `user` (
  `id` int(8) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `username` varchar(20) NOT NULL COMMENT '用户名',
  `password` varchar(20) NOT NULL COMMENT '密码',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

创建个maven工程

pom导入依赖

	<dependencies>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.3</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <!--下面3个依赖只是打印日志的，没有也能生成代码-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.1.11</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.11</version>
        </dependency>
    </dependencies>

启动类写main方法

package com.rgb3;

import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;

import java.util.ArrayList;
import java.util.List;

/**
 * @author tony
 * @date 2021/9/16 21:52
 */
public class CodeAutoGenerator {
    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir(System.getProperty("user.dir") + "/src/main/java");
        globalConfig.setAuthor("tony");
        globalConfig.setOpen(false);
        mpg.setGlobalConfig(globalConfig);

		//数据源配置
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setUrl("jdbc:mysql://localhost:3306/mp_generator?useUnicode=true&useSSL=false&characterEncoding=utf8");
        dataSourceConfig.setDriverName("com.mysql.jdbc.Driver");
        dataSourceConfig.setUsername("root");
        dataSourceConfig.setPassword("root");
        mpg.setDataSource(dataSourceConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setEntityLombokModel(true);    //开启lombook支持
        mpg.setStrategy(strategy);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName(null);
        pc.setParent("com.rgb3");
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };
        String projectPath = System.getProperty("user.dir");
        // 如果模板引擎是 velocity
        String templatePath = "/templates/mapper.xml.vm";

        // 自定义输出配置
        List<FileOutConfig> focList = new ArrayList<FileOutConfig>();
        // 自定义配置会被优先输出
        focList.add(new FileOutConfig(templatePath) {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！
                return projectPath + "/src/main/resources/mapper/"
                        + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);

        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();
        templateConfig.setXml(null); //关闭默认 xml 生成
        mpg.setTemplate(templateConfig);

        mpg.execute();
    }
}

启动main方法
控制台打印：

生成文件
controller

@Controller
@RequestMapping("/user")
public class UserController {

}

entity

@Data
@EqualsAndHashCode(callSuper = false)
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    /**
     * id
     */
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;

    /**
     * 用户名
     */
    private String username;

    /**
     * 密码
     */
    private String password;


}

mapper

public interface UserMapper extends BaseMapper<User> {

}

service

public interface IUserService extends IService<User> {

}

service实现类

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

}

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.rgb3.mapper.UserMapper">

</mapper>