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