mybatis there is no getter named for"Integer"

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一:发现问题java

sql动态语句中若是 parameterType="int"sql

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

是正确的,可是若是加上if testide

    <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>spa


则报错:.net

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


出错缘由:Mybatis默认采用ONGL解析参数,因此会自动采用对象树的形式取Integer.cmpid。Integer对象没有cmpid属性。若是不解析参数,mybatis自动识别传入的参数,不会报错。对象


二:解决办法
1.修改select语句blog

    <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>接口


参数名所有改成_parameter。

2.不修改sql,只修改接口

接口类:

Campusinfo sel_campusinfo( int cmpid);

改成:

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

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