Struts 2 ONLを使用してMapメソッドを遍歴します。詳しくは

8442 ワード
struts 2 map
一.アクション中のコード：MapAction.java

package com.zx.demo.action;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.opensymphony.xwork2.ActionSupport;
import com.zx.demo.model.Product;
import com.zx.demo.model.Student;
public class MapAction extends ActionSupport
{  
 private Map<String,String> map;
 private Map<String,Student> studentMap;
 private Map<String,String[]> arrayMap;
 private Map<String,List<Student>> listMap;  
 //    get set  
 public String testMap(){  
map=new HashMap<String,String>();
 map.put("1", "one");
 map.put("2", "two");
studentMap=new HashMap<String,Student>();
studentMap.put("student1",new Student(new Long(1),"20034140201","  1"," ",25));
studentMap.put("student2",new Student(new Long(2),"20034140202","  2"," ",26));
studentMap.put("student3",new Student(new Long(3),"20034140202","  3"," ",27));
arrayMap=new HashMap<String,String[]>();
arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"});
arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"});
arrayMap.put("arr3", new String[{"3","2003403","lixiaoning","male","21"});
listMap=new HashMap<String,List<Student>>();
  List<Student> list1=new ArrayList<Student>();
list1.add(new Student(new Long(1),"20034140201","  1"," ",25));
list1.add(new Student(new Long(2),"20034140202","  2"," ",25));
list1.add(new Student(new Long(3),"20034140203","  3"," ",25));
  listMap.put("class1", list1);
 List<Student> list2=new ArrayList<Student>();
list2.add(new Student(new Long(1),"20034140301","  1"," ",20));
list2.add(new Student(new Long(2),"20034140302","  2"," ",21));
list2.add(new Student(new Long(3),"20034140303","  3"," ",22));
list2.add(new Student(new Long(4),"20034140304","  4"," ",23));
  listMap.put("class2", list2);
return SUCCESS;  
  }  
}
二.先端テストページ：testMap.jsp
Javaコード

<%@ page
contentType="text/html;charset=UTF-8"
%> 
<%@ taglib prefix="s"
uri="/struts-tags" %>
 <html>
<head>
<title>struts2  map    </title>
</head>
<body>
<b>1.map  key String，value String   </b><br>
   <s:iterator value="map" id="column">
   <s:property value="#column"/><br>
 key: <s:property value="key"/><br>
 value:<s:property value="value"/><br>
   </s:iterator> 
******************************************<br>
 <table border="1" width="50%" cellspacing="0" cellpadding="0">
<tr>
 <td>key=value</td>
 <td>ID</td>
 <td>num</td>
 <td>name</td>
 <td>sex</td>
 <td>age</td>
</tr>
******************************************<br>
 <b>2.map  key String，value Student  </b>
<s:iterator value="studentMap" id="column">
<tr>
 <td>
  <s:property value="#column"/></td>
 <td>
  <s:property value="value.id"/></td>
 <td>
  <s:property value="value.num"/></td>
 <td>
  <s:property value="value.name"/></td>
 <td>
   <s:property value="value.sex"/></td>
 <td>
   <s:property value="value.age"/></td>
 </tr>
</s:iterator>
</table>
 <p> 
 
<table border="1" width="50%" cellspacing="0" cellpadding="0">
 <tr>
   <td>key=value</td>
   <td>ID</td>
   <td>num</td>
   <td>name</td>
   <td>sex</td>
   <td>age</td>
 </tr>
******************************************<br>
<b>3.map  key String，value String  </b> 
<s:iterator value="arrayMap" id="column">
<tr>
 <td><s:property value="#column"/></td>
 <td><s:property value="value[0]"/></td>
 <td><s:property value="value[1]"/></td>
 <td><s:property value="value[2]"/></td>
 <td><s:property value="value[3]"/></td>
 <td><s:property value="value[4]"/></td>
</tr>
</s:iterator>
</table>
<p> 
<table border="1" width="50%" cellspacing="0" cellpadding="0">
<tr>
 <td>class</td>
  <td>ID</td>
  <td>num</td>
  <td>name</td>
  <td>sex</td>
  <td>age</td>
</tr>
 ******************************************<br>
<b>4.map  key String，value list  </b>  
<s:iterator value="listMap" id="column">
 <s:set name="total" value="#column.value.size"/>
 <s:iterator value="#column.value" status="s">
<tr>
 <s:if test="#s.first">
  <td rowspan="${total}">
  <s:property value="#column.key"/>
  </td>
 </s:if> 
   <td>
   <s:property value="id"/>
   </td>
   <td>
   <s:property value="num"/>
   </td>
   <td>
   <s:property value="name"/>
   </td>
   <td><s:property value="sex"/></td>
   <td><s:property value="age"/></td>
</tr>
</s:iterator>
</s:iterator>
 </table>
</body>
</html>
添付：mapのタイプはMap＜Integer、List（Menu）＞がフロントエンドを巡回しています。session.powerListが格納するタイプは、List（Menu）です。

<s:iterator value="map" id="mapList">
   <s:if test="#mapList.key==0"><!-key 0      ->
   <s:iterator value="#mapList.value" id="map">
    <li class="current"><!--      ，     -->  
   <b><s:property value="#map.menuName" /></b></a>
     <ul>
     <s:iterator value="#session.powerList" id="power">
   <!--             -->
      <s:if test="#power.menuFatherId==#map.menuId">
    <li><a onClick="funFrame('admin/<s:property value="#power.menuUrl" />')" ><s:property value="#power.menuName" /></a>
    </li>
       </s:if>
     </s:iterator>
     </ul>
     </li>
     </s:iterator>
     </s:if>
     </s:iterator>
締め括りをつける
以上が、Struts 2がONLを使ってmapを遍歴する方法について詳しく説明した内容の全部です。皆さんの助けになりたいです。興味のある方は、ONL表現の基本文法と使い方の詳細を参照してください。  Struts 2はognl表現により投影を実現する。  Struts 2 ONL表現の実例などです。みなさんの応援に感謝します。
ONL表現の基本文法と使い方の詳細
node.js簡単な圧縮／解凍機能の例を実現します。