Mybatis 逆向工程【通过数据库表，逆向工程自动生成实体类和mapper】

Love The Way You Lie 2021-12-10 18:31 349阅读 0赞

//通过数据库表自动生成实体类和mapper

1 创建java项目

![20190711174951480.png][]

2 到入jar包

![20190711174639575.png][]

3 编写配置文件

generatorConfig.xml

<?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="testTables" targetRuntime="MyBatis3">
    		<commentGenerator>
    			
    			<property name="suppressAllComments" value="true" />
    		</commentGenerator>
    		
    		<jdbcConnection driverClass="com.mysql.jdbc.Driver"
    			connectionURL="jdbc:mysql://localhost:3306/springmvc" userId="root"
    			password="123456">
    		</jdbcConnection>
    		
    
    		
    		<javaTypeResolver>
    			<property name="forceBigDecimals" value="false" />
    		</javaTypeResolver>
    
    		
    		<javaModelGenerator targetPackage="com.pojo"
    			targetProject=".\src">
    			
    			<property name="enableSubPackages" value="false" />
    			
    			<property name="trimStrings" value="true" />
    		</javaModelGenerator>
            
    		<sqlMapGenerator targetPackage="com.mapper" 
    			targetProject=".\src">
    			
    			<property name="enableSubPackages" value="false" />
    		</sqlMapGenerator>
    		
    		<javaClientGenerator type="XMLMAPPER"
    			targetPackage="com.mapper" 
    			targetProject=".\src">
    			
    			<property name="enableSubPackages" value="false" />
    		</javaClientGenerator>
    		
    		<table schema="" tableName="user"></table>
    		<table schema="" tableName="items"></table>
    		
    		
    	</context>
    </generatorConfiguration>

4 编写java类

GeneratorSqlmap.java

import java.io.File;
    import java.io.IOException;
    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.exception.XMLParserException;
    import org.mybatis.generator.internal.DefaultShellCallback;
    
    public class GeneratorSqlmap {
    
    	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 = new File("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 {
    			GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
    			generatorSqlmap.generator();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		
    	}
    
    }

5 运行java程序并刷新

![20190711175006876.png][]===========>>>>>>>>>>>>![20190711175050987.png][]

[20190711174951480.png]: /images/20211210/97fa9f9daea147d09ab879f182a8682e.png
[20190711174639575.png]: /images/20211210/b4c06abc48da45aa93b1ab6f345efc87.png
[20190711175006876.png]: https://img-blog.csdnimg.cn/20190711175006876.png
[20190711175050987.png]: /images/20211210/439ec5f51ec44ee597f63b337d30840e.png