struts2 <s:append>标签示例

package com.h3.common.action;

import java.util.arraylist;
import java.util.hashmap;
import java.util.list;
import java.util.map;

import com.opensymphony.xwork2.actionsupport;
 
public class appendtagaction extends actionsupport{
 
	private list<string> list1 = new arraylist<string>();
	private list<string> list2 = new arraylist<string>();
	private list<string> list3 = new arraylist<string>();

	private map<string,string> map1 = new hashmap<string,string>();
	private map<string,string> map2 = new hashmap<string,string>();
	private map<string,string> map3 = new hashmap<string,string>();
	
	public string execute() {
		
		list1.add("list1 - 1");
		list1.add("list1 - 2");
		list1.add("list1 - 3");
		
		list2.add("list2 - 1");
		list2.add("list2 - 2");
		list2.add("list2 - 3");
		
		list3.add("list3 - 1");
		list3.add("list3 - 2");
		list3.add("list3 - 3");
		
		map1.put("map1-key1", "map1-value1");
		map1.put("map1-key2", "map1-value2");
		map1.put("map1-key3", "map1-value3");
		
		map2.put("map2-key1", "map2-value1");
		map2.put("map2-key2", "map2-value2");
		map2.put("map2-key3", "map2-value3");
		
		map3.put("map3-key1", "map3-value1");
		map3.put("map3-key2", "map3-value2");
		map3.put("map3-key3", "map3-value3");
		
		return success;
	}

	//getter methods...
}

2. append 标签文档

jsp页面使用<s:append>标签将3个arraylist/3个hashmap/1个arraylist+1个hashmap合并成一个迭代器，并遍历它的值，并打印出来。

appenditerator.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
 <html>
<head><title>struts2 append 标签示例 - by www.h3.com</title>
</head>
 
<body>
<h1>struts2 append 标签示例</h1>

1. combine 3 arraylist into a single iterator.
<s:append var="customlistiterator">
     <s:param value="%{list1}" />
     <s:param value="%{list2}" />
     <s:param value="%{list3}" />
</s:append>
<ol>
<s:iterator value="%{#customlistiterator}">
     <li><s:property /></li>
</s:iterator>
</ol>

2. combine 3 hashmap into a single iterator.
<s:append var="custommapiterator">
     <s:param value="%{map1}" />
     <s:param value="%{map2}" />
     <s:param value="%{map3}" />
</s:append>
<ol>
<s:iterator value="%{#custommapiterator}">
     <li><s:property /></li>
</s:iterator>
</ol>

3. combine arraylist and hashmap into a single iterator.
<s:append var="custommixediterator">
     <s:param value="%{list1}" />
     <s:param value="%{map1}" />
</s:append>
<ol>
<s:iterator value="%{#custommixediterator}">
     <li><s:property /></li>
</s:iterator>
</ol>

</body>
</html>

3. struts.xml

<?xml version="1.0" encoding="utf-8" ?>
<!doctype struts public
"-//apache software foundation//dtd struts configuration 2.0//en"
"http://struts.apache.org/dtds/struts-2.0.dtd">
 
<struts>

 	<constant name="struts.devmode" value="true" />
	
	<package name="default" namespace="/" extends="struts-default">
	
		<action name="appendtagaction" 
			class="com.h3.common.action.appendtagaction" >
			<result name="success">/pages/appenditerator.jsp</result>
		</action>
		
	</package>
		
</struts>

4. 示例

http://localhost:8080/struts2appendtag/appendtagaction.action

在浏览器中打开，显示结果如下：

struts 2 append tag example

1. combine 3 arraylist into a single iterator.

  1. list1 - 1
  2. list1 - 2
  3. list1 - 3
  4. list2 - 1
  5. list2 - 2
  6. list2 - 3
  7. list3 - 1
  8. list3 - 2
  9. list3 - 3

2. combine 3 hashmap into a single iterator.

  1. map1-key3=map1-value3
  2. map1-key1=map1-value1
  3. map1-key2=map1-value2
  4. map2-key2=map2-value2
  5. map2-key3=map2-value3
  6. map2-key1=map2-value1
  7. map3-key3=map3-value3
  8. map3-key1=map3-value1
  9. map3-key2=map3-value2

3. combine arraylist and hashmap into a single iterator.

  1. list1 - 1
  2. list1 - 2
  3. list1 - 3
  4. map1-key3=map1-value3
  5. map1-key1=map1-value1
  6. map1-key2=map1-value2

参考

struts 2 append 标签文档

下载代码 - http://pan.baidu.com/s/1ntos9zj

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