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 = ?)...