一：發現問題

sql動態語句中如果 parameterType="int"

<select id="sel_campusinfo" parameterType="int" resultType="Campusinfo">
 		select cmpid,cmpname from campusinfo where state!='d' and cmpid=#{cmpid}
 </select>

<select id="sel_campusinfo" parameterType="int" resultType="Campusinfo">
 		select cmpid,cmpname from campusinfo where state!='d' and cmpid!=0
 		<if test="cmpid!=0">and cmpid=#{cmpid}</if>
 </select>
 

There is no getter for property named 'cmpid' in 'class java.lang.Integer' 

出錯原因：Mybatis預設採用ONGL解析引數，所以會自動採用物件樹的形式取Integer.cmpid。Integer物件沒有cmpid屬性。如果不解析引數，mybatis自動識別傳入的引數，不會報錯。

二：解決辦法

<select id="sel_campusinfo" parameterType="int" resultType="Campusinfo">
 		select cmpid,cmpname from campusinfo where state!='d' and cmpid!=0
 		<if test="_parameter!=0">and cmpid=#{_parameter}</if>
 	</select>
 

2.不修改sql，只修改介面

介面類：

Campusinfo sel_campusinfo( int cmpid);

改為：

Campusinfo sel_campusinfo(@Param(value="cmpid") int cmpid);