Struts2 <s:updownselect>示例
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2023-03-14
在Struts2,<s:updownselect>标签用于创建一个带有按钮的HTML选择组件向上或向下移动在选择组件的选项。当提交表单时,所有的选择方案将提交在它们的排列顺序。
这里创建一个Web工程:strut2updownselect,来演示在多个复选框如何设置的默认值,整个项目的结构如下图所示:
<s:updownselect> 示例
<s:updownselect list="#{'KFC':'KFC', 'McDonald':'McDonald', 'Burger King':'Burger King', 'Pizza Hut':'Pizza Hut', 'Fat Boy King':'Fat Boy King'}" name="favFastFood" headerKey="-1" headerValue="--- Please Order ---" size="7" />
产生下面的HTML代码,选择组件,按钮和JavaScript在选择组件向下移动的选项。 (默认的XHTML主题)
<tr> <td class="tdLabel"></td> <td><script type="text/javascript" src="/Struts2Example/struts/optiontransferselect.js"> </script> <table> <tr><td> <select name="favFastFood" size="7" id="resultAction_favFastFood" multiple="multiple"> <option value="-1">--- Please Order ---</option> <option value="KFC">KFC</option> <option value="McDonald">McDonald</option> <option value="Burger King">Burger King</option> <option value="Pizza Hut">Pizza Hut</option> <option value="Fat Boy King">Fat Boy King</option> </select> <input type="hidden" id="__multiselect_resultAction_favFastFood" name="__multiselect_favFastFood" value="" /> </td></tr> <tr><td> <input type="button" value="^" onclick=" moveOptionUp(document.getElementById('resultAction_favFastFood'), 'key', '-1');" /> <input type="button" value="v" onclick=" moveOptionDown(document.getElementById('resultAction_favFastFood'), 'key', '-1');" /> <input type="button" value="*" onclick="selectAllOptionsExceptSome( document.getElementById('resultAction_favFastFood'), 'key', '-1');" /> </td></tr> </table></td> </tr> <script type="text/javascript"> var containingForm = document.getElementById("resultAction"); StrutsUtils.addEventListener(containingForm, "submit", function(evt) { var updownselectObj = document.getElementById("resultAction_favFastFood"); selectAllOptionsExceptSome(updownselectObj, "key", "-1"); }, true); </script>
Struts2 <s:updownselect> 示例
在一个完整的全面<s:updownselect>标签例子来说明如何使用OGNL和Java列出的数据填充到上下按钮选择列表。
1. 动作类 - Action
Action类来生成和存储选择选项。
UpDownSelectAction.java
package com.yiibai.common.action; import java.util.ArrayList; import java.util.List; import com.opensymphony.xwork2.ActionSupport; public class UpDownSelectAction extends ActionSupport{ private List<String> moviesList = new ArrayList<String>(); private String favMovie; private String favFastFood; public UpDownSelectAction(){ moviesList.add("Spider Man"); moviesList.add("Matrix"); moviesList.add("Super Man"); moviesList.add("Dark Knight"); moviesList.add("BraveHeart"); moviesList.add("Ultraman"); } public String getFavFastFood() { return favFastFood; } public void setFavFastFood(String favFastFood) { this.favFastFood = favFastFood; } public List<String> getMoviesList() { return moviesList; } public void setMoviesList(List<String> moviesList) { this.moviesList = moviesList; } public String getFavMovie() { return favMovie; } public void setFavMovie(String favMovie) { this.favMovie = favMovie; } public String execute() throws Exception{ return SUCCESS; } public String display() { return NONE; } }
2. 结果页面
通过“<s:updownselect>”渲染上下按钮选择组件标签。
updownselect.jsp
<%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> <s:head /> </head> <body> <h1>Struts 2 updownselect example</h1> <s:form action="resultAction" namespace="/" method="POST" > <s:updownselect list="#{'KFC':'KFC', 'McDonald':'McDonald', 'Burger King':'Burger King', 'Pizza Hut':'Pizza Hut', 'Fat Boy King':'Fat Boy King'}" name="favFastFood" headerKey="-1" headerValue="--- Please Order ---" size="7" /> <s:updownselect list="moviesList" name="favMovie" headerKey="-1" headerValue="--- Please Order ---" size="10" moveUpLabel="Move Up" moveDownLabel="Move Down" selectAllLabel="Select All" /> <s:submit value="submit" name="submit" /> </s:form> </body> </html>
result.jsp
<%@ taglib prefix="s" uri="/struts-tags" %> <html> <body> <h1>Struts 2 updownselect example</h1> <h2> Favor fast food : <s:property value="favFastFood"/> </h2> <h2> Favor movies : <s:property value="favMovie"/> </h2> </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="updownSelectAction" class="com.yiibai.common.action.UpDownSelectAction" method="display"> <result name="none">pages/updownselect.jsp</result> </action> <action name="resultAction" class="com.yiibai.common.action.UpDownSelectAction" > <result name="success">pages/result.jsp</result> </action> </package> </struts>
4. 示例
http://localhost:8080/Struts2Example/updownSelectAction.action
选择选项,将其向上或向下。
当提交后,所有的选项都将在它们的排列顺序提交。
参考
- Struts 2 updownselect example
- https://www.xnip.cn/struts_2/struts-2-sdoubleselect-example.html
代码下载: http://pan.baidu.com/s/1hqtuAdY