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  • 【iBatis】使用resultMap配置返回结果时报错“列名无效”

    使用iBatis联查DEPT、EMP两张表时

    采用如下结构

    <resultMap id="find_departmentMap" class="com.dto.DepartmentDTO">
      <result property="deptNO" column='deptNO'/>
      <result property="dName" column='dName'/>
      <result property="loc" column='loc'/>
      <result property="employeeList" column='{deptNO=depNO}' select="comSqlMap.findEmployee" />
    </resultMap>
    
    <select id="findDepartment" parameterClass="java.util.HashMap" resultClass="find_departmentMap">
    SELECT DEPTNO, DNAME, LOC
    FROM DEPT
    WHERE DEPTNO = #deptNO#
    AND DNAME = #dName#
    </select>
    
    <select id="findEmployee" parameterClass="java.lang.String" resultClass="com.dto.EmployeeDTO">
    SELECT EMPNO, ENAME, JOB, 
        MGR, HIREDATE, SAL, 
        COMM, DEPTNO
    FROM EMP
    WHERE DEPTNO = #deptNO#
    </select>

    程序报错:“employeeList" 列名无效

    处理方法:把“findEmployee”的select的parameterClass属性值改为java.util.HashMap,如下所示

    <select id="findEmployee" parameterClass="java.util.HashMap" resultClass="com.dto.EmployeeDTO">
    SELECT EMPNO, ENAME, JOB, 
        MGR, HIREDATE, SAL, 
        COMM, DEPTNO
    FROM EMP
    WHERE DEPTNO = #deptNO#
    </select>
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  • 原文地址:https://www.cnblogs.com/leemoby/p/3651850.html
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