我使用的是Eclipse Luna 装了自己常用的插件, generator也是其中一个
推荐下载 MyBatis_Generator_1.3.1.zip离线安装包

 <?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>

      <!-- classPathEntry:数据库的JDBC驱动的jar包地址-->

      <classPathEntry location="E:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar" />

    <context id="DB2Tables" targetRuntime="MyBatis3">

      <commentGenerator>

        <!-- 是否去除自动生成的注释 true：是 ： false:否 -->

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

        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->

      </commentGenerator>

      <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"

              connectionURL="jdbc:oracle:thin:@198.17.1.1:1521:ORCL"

              userId="unuser"

              password="password">

      </jdbcConnection>

        <!--  默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer

             true，把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal

         -->

      <javaTypeResolver >

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

      </javaTypeResolver>

      <!-- targetProject:自动生成代码的位置 -->

      <javaModelGenerator targetPackage="com.soft.model" targetProject="E:\WebWorkSpace\workspace_js\downAttachdemo\src">

          <!-- enableSubPackages:是否让schema作为包的后缀 -->

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

        <!-- 从数据库返回的值被清理前后的空格  -->

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

      </javaModelGenerator>  

      <sqlMapGenerator targetPackage="sqlmap"  targetProject="E:\WebWorkSpace\workspace_js\downAttachdemo\conf">

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

      </sqlMapGenerator>  

      <javaClientGenerator type="XMLMAPPER" targetPackage="com.soft.mapping"  targetProject="E:\WebWorkSpace\workspace_js\downAttachdemo\src">

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

      </javaClientGenerator>

      <!-- tableName:用于自动生成代码的数据库表；domainObjectName:对应于数据库表的javaBean类名 -->

      <table schema="untodo" tableName="mocha_t_app" domainObjectName="MochaTodoApp" >  

      </table>

    </context>  

    </generatorConfiguration>