ibatis中iterate的用法（conjunction="or" ","）

例子一

查询条件dto

public class queryCondition
{
private String[] stuIds;
private String name;
}

查询sqlMap

<select id="selectStu" parameterClass="cn.xy.queryCondition" resultClass="cn.xy.Student">
select id,name from student
<dynamic prepend="where">
  <isNotNull property="stuIds" prepend="and">
   <iterate property="stuIds" open="id in (" close=")" conjunction=",">
    #stuIds[]#
   </iterate>
  </isNotNull>
  <isNotNull property="name" prepend="and">
   name like '%$name$%'
  </isNotNull>
</dynamic>
</select>

在查询条件中有一个数组stuIds,在动态标签中进行遍历，看每一个student的id是否在该数组中。

发出的语句 select id,name from student where id in ( ? , ?) ...

例子二

查询条件dto

public class queryCondition
{
private List<Student> lst;
private String name;
}

查询sqlMap

<select id="selectStu" parameterClass="cn.xy.queryCondition" resultClass="cn.xy.Student">
select id,name from student
<dynamic prepend="where">
  <isNotNull property="lst" prepend="and">
   <iterate property="lst" open=" (" close=")" conjunction="or">
    id = #lst[].id#
   </iterate>
  </isNotNull>
  <isNotNull property="name" prepend="and">
   name like '%$name$%'
  </isNotNull>
</dynamic>
</select>

发出的语句 select id,name from student where (id = ? or id = ?)...

巴特西

ibatis中iterate的用法（conjunction="or" ","）

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