java - 无法在Mybatis中绑定(bind)数据

我正在尝试使用但遇到了一些问题。代码如下：

Bean.java

private class Bean{
 private String clientId;
//getter and setter
}

Dao.xml

<mapper namespace="...Dao">
    <resultMap id="bean" type="...Bean">
        <result property="clientId" column="CLIENT_ID" />
    </resultMap>

    <select id="getData" resultMap="bean"
         parameterType="someBean">

             SELECT *
             FROM tableClient
            WHERE CLIENT_ID        IN
            <foreach item="item" index="index" collection="list"
                open="(" separator="," close=")">
                trim(#{clientId})
                </foreach>
    </select>
</mapper>

该查询打算返回以下数据：

    List<Bean> getData(List<Bean> bean);

虽然查询执行成功，但是绑定数据时会引发异常。

2013-03-23 15:11:13,637 DEBUG  [getData] ==>  Preparing: SELECT * FROM tableClient WHERE CLIENT_ID IN ( trim(?) , trim(?) , trim(?) )


2013-03-23 15:11:13,637 DEBUG  [SqlSessionUtils] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@117c0eb]
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'clientId' not found. Available parameters are [list]


2013-03-23 15:11:13,637 DEBUG  [DataSourceUtils] Returning JDBC Connection to DataSource
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:365)
at $Proxy11.selectList(Unknown Source
....

最佳答案

假设您的列表中有具有clientId属性和getter的bean，则必须在trim(#{clientId})中按项目定义bean时，将trim(#{item.clientId})替换为foreach。