mybatis逆向工程步骤
一、导包
①mybatis-generator-core.1.3.2.jar
②mysql-connector.java.jar
二、随便创建一个类,把一下代码复制进去
1 package com.fjm.generator; 2 3 4 import java.io.File; 5 import java.io.IOException; 6 import java.util.ArrayList; 7 import java.util.List; 8 9 import org.mybatis.generator.api.MyBatisGenerator; 10 import org.mybatis.generator.config.Configuration; 11 import org.mybatis.generator.config.xml.ConfigurationParser; 12 import org.mybatis.generator.exception.XMLParserException; 13 import org.mybatis.generator.internal.DefaultShellCallback; 14 15 public class Mygenerator { 16 public static void main(String[] args) throws Exception, XMLParserException { 17 List<String> warnings = new ArrayList<String>(); 18 boolean overwrite=true; 19 File configFile = new File("config/generatorConfig.xml"); 20 ConfigurationParser cp = new ConfigurationParser(warnings); 21 Configuration config = cp.parseConfiguration(configFile); 22 DefaultShellCallback callback = new DefaultShellCallback(overwrite); 23 MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); 24 myBatisGenerator.generate(null); 25 } 26 }
三、创建一个generatorConfig.xml配置文件(修改自己的:数据库密码、数据库表名、包名等)
<?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> <!-- 是否去除自动生成的注释 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--数据库连接的信息:驱动类、连接地址、用户名、密码 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root" password="521314"> </jdbcConnection> <!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg" userId="yycg" password="yycg"> </jdbcConnection> --> <!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO类的位置 --> <javaModelGenerator targetPackage="cn.fjm.ms.po" targetProject=".src"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> <!-- 从数据库返回的值被清理前后的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper映射文件生成的位置 --> <sqlMapGenerator targetPackage="cn.fjm.ms.mapper" targetProject=".src"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper接口生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="cn.fjm.ms.mapper" targetProject=".src"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定数据库表 --> <table tableName="user"></table> <table tableName="orders"></table> <table tableName="orderdetail"></table> <table tableName="items"></table> </context> </generatorConfiguration>
四、运行自动生成po类,mapper映射文件和相关的接口