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>