MyBatis Generator

我多次用GeneratorDisplay這個類去逆向生成，我的mapper.xml文件里的映射就會出現很多重復的字段映射關系
比如 我連續生成三次就會這樣

<id?column="id"?property="id"?jdbcType="INTEGER"?/>
<result?column="username"?property="username"?jdbcType="VARCHAR"?/>
<result?column="password"?property="password"?jdbcType="VARCHAR"?/>
<result?column="nickname"?property="nickname"?jdbcType="VARCHAR"?/>

<id?column="id"?property="id"?jdbcType="INTEGER"?/>
<result?column="username"?property="username"?jdbcType="VARCHAR"?/>
<result?column="password"?property="password"?jdbcType="VARCHAR"?/>
<result?column="nickname"?property="nickname"?jdbcType="VARCHAR"?/>

<id?column="id"?property="id"?jdbcType="INTEGER"?/>
<result?column="username"?property="username"?jdbcType="VARCHAR"?/>
<result?column="password"?property="password"?jdbcType="VARCHAR"?/>
<result?column="nickname"?property="nickname"?jdbcType="VARCHAR"?/>