我正在使用struts2来实现我的应用程序。在我的应用程序中，我必须实现两个下拉，第二个下拉的值取决于第一次下拉。我从一个例子中得到了参考并相应地实现了我的代码，但仍然没有得到结果。请提出您的建议，以使此代码有效。
SupporterAction.java
package action;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import entityBean.TicketDataBean;
import entityBean.UserBean;
import entityListener.SupporterListener;
import entityManager.Application;
@SuppressWarnings("serial")
public class SupporterAction extends ActionSupport{
private String application;
private String number;
private List<String> applicationNames;
List<String> ticketNumber;
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public List<String> getApplicationNames() {
return applicationNames;
}
public void setApplicationNames(List<String> applicationNames) {
this.applicationNames = applicationNames;
}
public List<String> getTicketNumber() {
return ticketNumber;
}
public void setTicketNumber(List<String> ticketNumber) {
this.ticketNumber = ticketNumber;
}
public String getApplication() {
return application;
}
public void setApplication(String application) {
this.application = application;
}
public String getJSON() {
return execute();
}
@SuppressWarnings("unchecked")
public String execute()
{
@SuppressWarnings("rawtypes")
Map session = ActionContext.getContext().getSession();
System.out.println(session.get("currentSessionUser"));
applicationNames = new ArrayList<String>();
UserBean userBean = (UserBean)session.get("currentSessionUser");
List<Application> applicationObj = userBean.getApplication();
for (Application obj : applicationObj)
{
System.out.println(obj.getApplicationName());
applicationNames.add(obj.getApplicationName());
}
session.put("ApplicationNames",applicationNames);
System.out.println("Hello");
System.out.println(application);
if(application != null)
{
ticketNumber=new ArrayList<String>();
System.out.println("Hello 1");
SupporterListener sl = new SupporterListener();
List<TicketDataBean> tdbList = sl.getPendingTickets(application);
if(!tdbList.isEmpty())
{
for(TicketDataBean td : tdbList)
{
ticketNumber.add(td.getNumber());
}
session.put("logined","true");
session.put("TicketNumber",ticketNumber);
}
}
return "success";
}
}
Supporter.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form id="formSelectReload" theme="simple" cssClass="yform" action="getApplicationList">
<fieldset>
<div class="type-text">
<label for="application">Application : </label>
<s:url var="remoteurl" action="getApplicationList" namespace="/"/>
<sj:select href="%{remoteurl}" id="application" name="application"
list="applicationNames" onChange="reloadsecondlist" emptyOption="false"
headerKey="-1" headerValue="Please Select a Application" />
</div>
<s:property value="#session.ApplicationNames"/>
<div class="type-text">
<label for="number">Ticket Number: </label>
<s:url var="remoteurl" action="getApplicationList" namespace="/"/>
<sj:select href="%{remoteurl}" id="ticketNumber" formIds="formSelectReload"
reloadTopics="reloadsecondlist" name="number"
list="ticketNumber"
emptyOption="false"
headerKey="-1" headerValue="Please Select a Ticket Number"/>
</div>
<div class="type-button">
<sj:submit
id="submitFormSelectReload"
/>
</div>
</fieldset>
</s:form>
</body>
</html>
struts.xml中
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="false" />
<constant name="struts.custom.i18n.resources" value="ApplicationResources" />
<package name="login" extends="struts-default">
<action name="login"
class="action.LoginAction"
method="execute">
<result name="success">/Home.jsp</result>
<result name="error">/InvalidLogin.jsp</result>
<result name="INVALID SESSION">/Home.jsp</result>
</action>
<action name="logout"
class="action.LoginAction"
method="logout">
<result name="success">/Login.jsp</result>
</action>
<action name="register">
<result>/Register.jsp</result></action>
<action name="importexcel">
<result>/ImportExcel.jsp</result></action>
<action name="supporter" class="action.SupporterAction"
method="execute">
<result name="success">/Supporter.jsp</result></action>
<action name="registeruser"
class="action.RegisterAction"
method="register">
<result name="success">/UserLogged.jsp</result>
<result name="error">/InvalidLogin.jsp</result>
<result name="INVALID SESSION">/Register.jsp</result>
</action>
<action name="importExcel"
class="action.ImportExcelAction"
method="importExcel">
<result name="success">/Home.jsp</result>
<result name="error">/InvalidLogin.jsp</result>
<result name="INVALID SESSION">/Home.jsp</result>
</action>
</package>
<package name="default" extends="struts-default,json-default" namespace="/">
<action name="getApplicationList"
class="action.SupporterAction" >
<result type="json" />
</action>
</package>
</struts>
jar文件
我得到的结果是
正如我们在结果图中看到的那样，列表正在填充，但我无法在下拉列表中获取它。请提出建议。
提前感谢您的回答。
