1012
ibatis中動態語句的iterate標簽
例子一
查詢條件dto
public class queryCondition
{
private String[] stuIds;
private String name;
}
查詢sqlMap
<select 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>
在查詢條件中有一個數組stuIds,在動態標簽中進行遍曆，看每一個student的id是否在該數組中。
發出的語句 select id,name from student where id in ( ? , ?) ...
例子二
查詢條件dto
public class queryCondition
{
private List<Student> lst;
private String name;
}
查詢sqlMap
<select 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>
發出的語句 select id,name from student where (id = ? or id = ?)...
最後更新：2017-04-02 15:15:03