官网链接：https://mp.baomidou.com/

废话不多说，不了解的看官网。在这里对其逆向工程做一些总结。

以oracle为例

1，添加pom依赖 (数据库驱动不再演示)

<?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>2.1.6.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>com.g7go</groupId>
    <artifactId>mybatis-plus</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mybatis-plus</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>swagger-spring-boot-starter</artifactId>
            <version>1.9.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity</artifactId>
            <version>1.7</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

</project>

2，编写启动类和设置配置

package com.g7go.plus;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.converts.OracleTypeConvert;
import com.baomidou.mybatisplus.generator.config.rules.IColumnType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;

/**
 * mybatis-plus代码生成器
 *
 * @author lwc
 */
public class MyBatisPlusGeneratorOracle {

    public static void main(String[] args) {

        AutoGenerator mpg = new AutoGenerator();

        //全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setFileOverride(true);
        gc.setSwagger2(true);
        gc.setActiveRecord(false);
        gc.setBaseResultMap(true);
        gc.setBaseColumnList(true);
        gc.setAuthor("Mr_Lee");
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.ORACLE);

        //自定义类型转换
        dsc.setTypeConvert(new OracleTypeConvert() {
            @Override
            public IColumnType processTypeConvert(GlobalConfig globalConfig, String fieldType) {
                return super.processTypeConvert(globalConfig, fieldType);
            }
        });

        //数据库配置
        dsc.setDriverName("oracle.jdbc.driver.OracleDriver");
        dsc.setUsername("lwc");
        dsc.setPassword("lwc");
        dsc.setUrl("jdbc:oracle:thin:@127.0.0.1:1521:xe");
        mpg.setDataSource(dsc);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setTablePrefix("T_");
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        mpg.setStrategy(strategy);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent("com.g7go.plus");
        mpg.setPackageInfo(pc);

        // 执行生成
        mpg.execute();
    }

}

3,执行效果演示