1、POM添加依赖

?<dependency>
? ? ? ? ? ? <groupId>org.mybatis.spring.boot</groupId>
? ? ? ? ? ? <artifactId>mybatis-spring-boot-starter</artifactId>
? ? ? ? ? ? <version>2.2.0</version>
? ? ? ? </dependency>
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.mybatis.generator</groupId>
? ? ? ? ? ? <artifactId>mybatis-generator-core</artifactId>
? ? ? ? ? ? <version>1.3.6</version>
? ? ? ? </dependency>

2、application.yml配置数据连接

############################################################
# 数据源相关配置，这里用的是阿里的druid 数据源
############################################################
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/db_ccjg?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.initial-size=1
spring.datasource.druid.min-idle=1
spring.datasource.druid.max-active=20
spring.datasource.druid.test-on-borrow=true
spring.datasource.druid.stat-view-servlet.allow=true

3、在启动主类添加扫描器

4、增加generatorConfig.xml配置文件
在resources文件下创建generatorConfig.xml文件。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <!-- 数据库驱动，项目中如果有则不需要指定 -->
    <!--<classPathEntry location="mysql-connector-java-5.1.45.jar" />-->
    <!--数据库链接URL，用户名、密码 -->
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <property name="javaFileEncoding" value="UTF-8"/>

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/db_ccjg"
                        userId="root"
                        password="root">
        </jdbcConnection>
        <!-- 是否启用java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 实体类路径 -->
        <javaModelGenerator targetPackage="com.example.serviceuser.pojo" targetProject="F:\公司资料\代码\manage-htmlx\cxjg-spring-cloud\service-user\src\main\java">
            <!--<javaModelGenerator targetPackage="com.wonders.cop.po" targetProject="src/main/java">-->
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- xml路径 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="F:\公司资料\代码\manage-htmlx\cxjg-spring-cloud\service-user\src\main\resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- mapper接口路径 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.example.serviceuser.dao" targetProject="F:\公司资料\代码\manage-htmlx\cxjg-spring-cloud\service-user\src\main\java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <table tableName="user_info"></table>
    </context>

</generatorConfiguration>

5、创建Generator类

package com.example.serviceuser.utils;

/**
 * @ClassName &{NAME}
 * @Description TODO
 * @Author zhanghao MX8837
 * @Date 2022/6/23 16:14
 * @Version 1.0
 **/
import java.io.File;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import org.springframework.util.ResourceUtils;

public class GeneratorDisplay {
    public void generator() throws Exception{
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        //指定 逆向工程配置文件
        File configFile = ResourceUtils.getFile("classpath:generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);
    }

    public static void main(String[] args) throws Exception {
       /* try {
            GeneratorDisplay generatorSqlmap = new GeneratorDisplay();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }
*/

        try {
            List<String> warnings = new ArrayList<>();
            boolean overwrite = true;
            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
            InputStream inputStream = classLoader.getResourceAsStream("generatorConfig.xml");
            ConfigurationParser configurationParser = new ConfigurationParser(warnings);
            Configuration config = configurationParser.parseConfiguration(inputStream);
            DefaultShellCallback defaultShellCallback = new DefaultShellCallback(overwrite);
            MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, defaultShellCallback, warnings);
            myBatisGenerator.generate(null);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}