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mybatis-generator生成model和dao层代码

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1、建立文件夹myibatisGen

2、下载mybatis-generator-core-1.3.1.jar或者其它版本的jar包，到myibatisGen文件夹下

3、为生成代码建立配置文件“generatorConfig.xml”

4、生成代码

       java -jar mybatis-generator-core-1.3.1.jar -configfile generatorConfig.xml -overwrite

5、根据以上步骤可以完成代码生成。generatorConfig.xml配置是代码生成的根本，贴上一个配置文件供大家参考。

<?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>  <!-- 数据库驱动 -->  <classPathEntry location="ojdbc14.jar" />    <!-- targetRuntime:生成代码的运行环境。由于我使用的是ibatis2所以选择Ibatis2Java5。-->  <context id="ORACLETables" targetRuntime="Ibatis2Java5">    <commentGenerator>        <property name="suppressDate" value="true" />      </commentGenerator>       <!-- 数据库配置 -->    <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"        connectionURL="jdbc:oracle:thin:@192.168.3.222:1521:orcl"        userId="orcl"        password="orcl">    </jdbcConnection>    <javaTypeResolver >      <property name="forceBigDecimals" value="false" />    </javaTypeResolver>    <!-- model配置 -->    <javaModelGenerator targetPackage="com.test.model" targetProject="test\src">      <property name="enableSubPackages" value="true" />      <property name="trimStrings" value="true" />    </javaModelGenerator>    <!-- dao配置 -->    <sqlMapGenerator targetPackage="com.test.dao"  targetProject="test\src\sqlmaps">      <property name="enableSubPackages" value="true" />    </sqlMapGenerator>    <javaClientGenerator type="SPRING" targetPackage="com.test.dao"  targetProject="test\src">      <property name="enableSubPackages" value="true" />    </javaClientGenerator>    <!-- 数据库表配置   domainObjectName：类名  -->    <table tableName="ORDER_ORDER" domainObjectName="ORDER">      <columnOverride  column="ID" property="id" javaType="java.lang.Long" jdbcType="NUMERIC"/>    </table>  <table tableName="ORDER_ISSUE_LEVEL" domainObjectName="ISSUE_LEVEL">      <columnOverride  column="ID" property="id" javaType="java.lang.Long" jdbcType="NUMERIC"/>    </table>  </context></generatorConfiguration>

6、如果不喜欢生成的代码中带有代理的mybatis代码生成器的注解信息，可以配置下面的配置参数关闭注解信息的生成：
<commentGenerator>  
        <property name="suppressAllComments" value="true" />  
</commentGenerator>  
7、想要mybaits代码生成器生成Example类换个名字，是通过插件实现的，即下面的这个插件配置参数很关键。
<plugin type="org.mybatis.generator.plugins.RenameExampleClassPlugin">  
    <property name="searchString" value="Example$" />  
    <property name="replaceString" value="Criteria" />  

</plugin>  

8、具体配置项可以查看mybatis-generator-core-1.3.1/doc下的文档。