ibatis中动态语句的iterate标签

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 whereid 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 = ?orid = ?)...