转载于:http://www.cnblogs.com/y-z-q/p/5734029.html


用"_parameter"代替当前参数

正确:

<select id="selectSubjectByPId"  parameterType="java.lang.Integer" resultType="java.util.Map">
        select subjectId,subjectName 
        from ts_subject 
        where subjectParentId= 0 
        <if test="_parameter != null">
            and subjectId = #{_parameter,jdbcType=INTEGER}
        </if>
</select>
错误:

<select id="selectSubjectByPId"  parameterType="java.lang.Integer" resultType="java.util.Map">
        select subjectId,subjectName 
        from ts_subject 
        where subjectParentId= 0 
        <if test="subjectId != null">
            and subjectId = #{subjectId,jdbcType=INTEGER}
        </if>
</select>
这时候就会出现异常.

There is no getter for property named 'subjectId' in 'class java.lang.Intege

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