<!--Map:不单单forech中的collection属性是map.key,其它所有属性都是map.key,比如下面的departmentId --> <select id="getEmployeesMapParams" resultType="Employees"> select * from EMPLOYEES e <where> <if test="departmentId!=null and departmentId!=‘‘"> e.DEPARTMENT_ID=#{departmentId} </if> <if test="employeeIdsArray!=null and employeeIdsArray.length!=0"> AND e.EMPLOYEE_ID in <foreach collection="employeeIdsArray" item="employeeId" index="index" open="(" close=")" separator=","> #{employeeId} </foreach> </if> </where> </select>
传入参数为:
List<Employees> getEmployeesMapParams(Map<String,Object> params);
key为departmentId,和employeeIdsArray
2.只传入单一list的情况:
<!--List:forech中的collection属性类型是List,collection的值必须是:list,item的值可以随意,Dao接口中参数名字随意 --> <select id="getEmployeesListParams" resultType="Employees"> select * from EMPLOYEES e where e.EMPLOYEE_ID in <foreach collection="list" item="employeeId" index="index" open="(" close=")" separator=","> #{employeeId} </foreach> </select>