Ibatis的批量处理-iterateiterate标签

iterate标签
prepend－可被覆盖的SQL语句组成部分，添加在语句的前面（可选）

property－类型为java.util.List的用于遍历的元素（必选）

open－整个遍历内容体开始的字符串，用于定义括号（可选）

close－整个遍历内容体结束的字符串，用于定义括号（可选）

conjunction－每次遍历内容之间的字符串，用于定义AND或OR（可选）

iterate－遍历类型为java.util.List(或数组)的元素。

Java代码

  
    

   
      
   
     /**
   
     
 * 批量更新测试方法
 * 
   
     @param
   
      map
 
   
     */
   
     
 
   
     public
   
      
   
     void
   
      updateListTest(){
 
 Map
   
     <
   
     String, Object
   
     >
   
      map
   
     =
   
     new
   
      HashMap
   
     <
   
     String, Object
   
     >
   
     ();
 
 List
   
     <
   
     User
   
     >
   
      userList
   
     =
   
     new
   
      ArrayList
   
     <
   
     User
   
     >
   
     ();
 
 User user1
   
     =
   
     new
   
      User();
 user1.setUsername(
   
     "
   
     tom
   
     "
   
     );
 user1.setUserpwd(
   
     "
   
     000
   
     "
   
     );
 User user2
   
     =
   
     new
   
      User();
 user2.setUsername(
   
     "
   
     tom
   
     "
   
     );
 user2.setUserpwd(
   
     "
   
     222
   
     "
   
     );
 User user3
   
     =
   
     new
   
      User();
 user3.setUsername(
   
     "
   
     tom
   
     "
   
     );
 user3.setUserpwd(
   
     "
   
     333
   
     "
   
     );
 
 userList.add(user1);
 userList.add(user2);
 userList.add(user3);
 
 map.put(
   
     "
   
     userList
   
     "
   
     , userList);
 map.put(
   
     "
   
     username
   
     "
   
     , 
   
     "
   
     tom
   
     "
   
     );
 
   
     int
   
      res
   
     =
   
     getSqlMapClientTemplate().update(
   
     "
   
     updateListTest
   
     "
   
     , map);
 System.out.println(
   
     "
   
     res----
   
     "
   
     +
   
     res);
 }
 
   
     public
   
      
   
     static
   
      
   
     void
   
      main(String[] args) {
 ApplicationContext context
   
     =
   
     new
   
      ClassPathXmlApplicationContext(
   
     "
   
     applicationContext.xml
   
     "
   
     );
 UserDAO dao
   
     =
   
     (UserDAO) context.getBean(
   
     "
   
     userDAO
   
     "
   
     );
 dao.updateListTest();
 }
  
    

sql文件

  
    

   
      
 
   
     <!--
   
      批理更新 
   
     -->
   
     
 
   
     <
   
     update 
   
     id
   
     ="updateListTest"
   
      parameterClass
   
     ="map"
   
     >
   
     
 update user set address='批理处理' where username=#username# and userpwd in 
 
   
     <
   
     iterate 
   
     property
   
     ="userList"
   
      open
   
     ="("
   
     
 close
   
     =")"
   
      conjunction
   
     =","
   
     >
   
     
 $userList[].userpwd$
 
   
     </
   
     iterate
   
     >
   
      
 
   
     </
   
     update
   
     >
   
     
 
   
     <!--
   
      批量更新 
   
     -->
   
     
 
   
     <
   
     update 
   
     id
   
     ="updateListTest1"
   
      parameterClass
   
     ="map"
   
     >
   
     
 update user set address='批理处理' where username=#username#
 
   
     <
   
     iterate 
   
     prepend
   
     ="and"
   
      property
   
     ="userList"
   
      open
   
     ="("
   
     
 close
   
     =")"
   
      conjunction
   
     ="or"
   
     >
   
     
 age=$userList[].userpwd$
 
   
     </
   
     iterate
   
     >
   
      
 
   
     </
   
     update
   
     >
   
     

   
     </
   
     sqlMap
   
     >