Java - MyBites 逆向工程

逆向工程是什么呢？ 说白了就是 mybatis 中提供了一个可以让你从 已经创建好的 数据库中，去通过表名，生成对应类，类属性和XML文件(sql语句)。

源码：mybatis_AutoGenerator

开始配置：

1. src 下创建 generator.xml 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="mysqlTables" targetRuntime="MyBatis3">

        <!--数据库配置-->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"

                        connectionURL="jdbc:mysql://localhost:3306/table_name"

                        userId="root"

                        password="">

        </jdbcConnection>

        <!-- java类型解析 -->

        <javaTypeResolver >

            <property name="forceBigDecimals" value="false" />

        </javaTypeResolver>

        <!-- 模型生成包名-->

        <javaModelGenerator targetPackage="com.q.backoffice.model" targetProject=".\src">

            <property name="enableSubPackages" value="true" />

            <property name="trimStrings" value="true" />

        </javaModelGenerator>

        <!-- mybatis的映射.xml-->

        <sqlMapGenerator targetPackage="com.q.backoffice.mapper"  targetProject=".\src">

            <property name="enableSubPackages" value="true" />

        </sqlMapGenerator>

        <!-- mybatis 的mapper接口生成的包路径-->

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.q.backoffice.mapper"  targetProject=".\src">

            <property name="enableSubPackages" value="true" />

        </javaClientGenerator>

        <!-- 配置生成表的模型-->

        <table tableName="items"/>

        <table tableName="orderdetail" domainObjectName="OrderDetail"></table>

        <table tableName="orders"></table>

        <table tableName="user"></table>

    </context>

</generatorConfiguration>

2. 创建一个类，并编写生成代码，运行后即可生成完毕

import org.mybatis.generator.api.MyBatisGenerator;

import org.mybatis.generator.config.Configuration;

import org.mybatis.generator.config.xml.ConfigurationParser;

import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.File;

import java.util.ArrayList;

import java.util.List;

public class Generator {

    public static void main(String[] args)throws Exception {

        List<String> warnings = new ArrayList<String>();

        boolean overwrite = true;

        File configFile = new File("src/generator.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);

    }

}