4 逆向工程
1 逆向工程
传统的开发中上述的三个组件需要开发者手动创建，逆向工程可以帮助开发者来自动创建三个组件，减轻开发者的工作量，提高工作效率。
2 如何使用
，简称 MBG，是一个专门为 框架开发者定制的代码生成器，可自动生成 框架所需的实体类、 接口、.xml，支持基本的 CRUD 操作，但是一些相对复杂的 SQL 需要开发者自己来完成。
<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>4.0.0modelVersion><groupId>com.southwindgroupId><artifactId>aimbgartifactId><version>1.0-SNAPSHOTversion><properties><maven.compiler.source>17maven.compiler.source><maven.compiler.target>17maven.compiler.target>properties><dependencies><dependency><groupId>org.mybatisgroupId><artifactId>mybatisartifactId><version>3.4.5version>dependency><dependency><groupId>mysqlgroupId><artifactId>mysql-connector-javaartifactId><version>8.0.11version>dependency><dependency><groupId>org.mybatis.generatorgroupId><artifactId>mybatis-generator-maven-pluginartifactId><version>1.3.2version>dependency><dependency><groupId>org.mybatis.generatorgroupId><artifactId>mybatis-generator-coreartifactId><version>1.3.2version>dependency>dependencies>project>
DOCTYPE generatorConfigurationPUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration><context id="testTables" targetRuntime="MyBatis3"><jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8"userId="root"password="111111">jdbcConnection><javaModelGenerator targetPackage="com.southwind.entiry" targetProject="./src/main/java">javaModelGenerator><sqlMapGenerator targetPackage="com.southwind.repository" targetProject="./src/main/java">sqlMapGenerator><javaClientGenerator type="XMLMAPPER" targetPackage="com.southwind.repository" targetProject="./src/main/java">javaClientGenerator><table tableName="t_user" domainObjectName="User">table>context>
generatorConfiguration>
package com.southwind.test;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 Main {public static void main(String[] args) {List<String> warings = new ArrayList<String>();boolean overwrite = true;String genCig = "/generatorConfig.xml";File configFile = new File(Main.class.getResource(genCig).getFile());ConfigurationParser configurationParser = newConfigurationParser(warings);Configuration configuration = null;try {configuration = configurationParser.parseConfiguration(configFile);} catch (IOException e) {e.printStackTrace();} catch (XMLParserException e) {e.printStackTrace();}DefaultShellCallback callback = new DefaultShellCallback(overwrite);MyBatisGenerator myBatisGenerator = null;try {myBatisGenerator = newMyBatisGenerator(configuration, callback, warings);} catch (InvalidConfigurationException e) {e.printStackTrace();}try {myBatisGenerator.generate(null);} catch (SQLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (InterruptedException e) {e.printStackTrace();}}
}
