通过逆向工程生成mapper文件，大大提升了开发效率一、引入依赖 <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency>二、编写配置文件<?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> <context id=“DB2Tables” targetRuntime=“MyBatis3”> <commentGenerator> <property name=“suppressAllComments” value=“true” /> </commentGenerator> <jdbcConnection driverClass=“com.mysql.jdbc.Driver” connectionURL=“jdbc:mysql://localhost:3306/shortvideo?characterEncoding=utf-8&serverTimezone=GMT%2B8” userId=“root” password=“123456”> </jdbcConnection> <javaTypeResolver > <property name=“forceBigDecimals” value=“false” /> </javaTypeResolver> <!– 指定javabean生成的位置 –> <javaModelGenerator targetPackage=“com.imooc.pojo” targetProject=”.\src\main\java"> <property name=“enableSubPackages” value=“true” /> <property name=“trimStrings” value=“true” /> </javaModelGenerator> <!– 指定mapper文件生成的位置 –> <sqlMapGenerator targetPackage=“mapper” targetProject=".\src\main\resources"> <property name=“enableSubPackages” value=“true” /> </sqlMapGenerator> <!– 指定mapper接口生成的位置 –> <javaClientGenerator type=“XMLMAPPER” targetPackage=“com.imooc.mapper” targetProject=".\src\main\java"> <property name=“enableSubPackages” value=“true” /> </javaClientGenerator> <table tableName=“vuser” domainObjectName=“Users”></table> <table tableName=“bgm”></table> <table tableName=“comments”></table> <table tableName=“search_records”></table> <table tableName=“users_fans”></table> <table tableName=“users_like_videos”></table> <table tableName=“users_report”></table> <table tableName=“videos”></table> </context></generatorConfiguration>三、编写启动类import org.mybatis.generator.api.MyBatisGenerator;import org.mybatis.generator.config.Configuration;import org.mybatis.generator.config.xml.ConfigurationParser;import org.mybatis.generator.exception.InvalidConfigurationException;import org.mybatis.generator.exception.XMLParserException;import org.mybatis.generator.internal.DefaultShellCallback;import java.io.File;import java.io.IOException;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;public class MybatisGenerator { public static void main(String[] args) throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException { List<String> warnings = new ArrayList<String>(); boolean overwrite = true; //指定配置文件的路径，相对或者绝对路径都可以 File configFile = new File(“E:\idea\short-video\src\main\java\com\imooc\utils\mybatisGenerator\mbg”); 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); }}