# Mybatis Geneartor 初步使用

Mybatis

发布日期: 2018-10-22

Mybatis Geneartor 初步使用

官方文档：http://www.mybatis.org/generator/index.html

创建package及资源文件夹

![屏幕快照 2018-10-22 下午5.09.32](Mybatis-Geneartor-初步使用/屏幕快照 2018-10-22 下午5.09.32.png)

配置文件

<?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="DB2Tables" targetRuntime="MyBatis3Simple">
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/login?useUnicode=true&amp;characterEncoding=utf8&amp;useSSL=false"
                        userId="root"
                        password="mysql123">
        </jdbcConnection>

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

        <!--指定model-->

        <javaModelGenerator targetPackage="com.an.study.model" targetProject="/Users/bxan/IdeaProjects/MybatisGeneator/src/main/java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

         <!--指定sql mapper-->
        <sqlMapGenerator targetPackage="com.an.study.dao"  targetProject="/Users/bxan/IdeaProjects/MybatisGeneator/src/main/resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!--指定java 接口-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.an.study.dao"
                             targetProject="/Users/bxan/IdeaProjects/MybatisGeneator/src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>


        <!--指定要逆向分析哪个表 创建对应的javabean  名字domainObjectName   -->
        <table tableName="user" domainObjectName="User">

        </table>
        <table tableName="address" domainObjectName="Address">

        </table>

    </context>
</generatorConfiguration>

运行Mybatis Generator

MyBatis Generator (MBG) can be run in the following ways:

From the command prompt with an XML configuration
As an Ant task with an XML configuration
As a Maven Plugin
From another Java program with an XML configuration
From another Java program with a Java based configuration
As an Eclipse Feature

Each method is described in detail on the linked pages.

示例：采用Java和XML的方式运行

特别注意：file要写对路径（可以是Mybatis Generator配置文件的相对路径也可以是Mybatis Generator配置文件的绝对路径）

List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("/Users/bxan/IdeaProjects/MybatisGeneator/src/main/resources/mbg.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);