struts2--显示等待页面

偏执的太偏执、 2024-02-18 14:29 17阅读 0赞

有时候对某个请求的处理可能会耗费较长的时间，在这种情况下，向用户显示一个等待页面更为友好一些。通过拦截器ExecuteAndWaitInterceptor来实现。

WaitAction:

package com.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    
    public class WaitAction extends ActionSupport{
      private int process;
    
      public String execute() throws Exception {
    	for(int i = 0; i < 10; i++){
    		Thread.sleep(1000L);
    		process += 10;
    	}
    	return SUCCESS;
    }
      
    public int getProcess() {
    	return process;
    }
    
    public void setProcess(int process) {
    	this.process = process;
    }
      
    }

struts.xml中的部分配置：

execAndWait拦截器会终止声明在它之后的拦截器的执行，因此这个拦截器的引用要出现在defaultStack拦截器之后

<action name="wait" class = "com.action.WaitAction">
           <interceptor-ref name="defaultStack"/>
           <interceptor-ref name="execAndWait"/>
           <result>/success.jsp</result>
           <result name = "wait">/wait.jsp</result>
        </action>

wait.jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%@ taglib prefix = "s" uri = "/struts-tags" %>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>My JSP 'wait.jsp' starting page</title>
        <meta http-equiv="refresh" content="2">
    
      </head>
      
      <body>
    您好，任务还为完成！已经完成任务<s:property value = "process"/>%
      </body>
    </html>

效果：

![Center][]

![Center 1][]

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/3d7606bec7c94b59a5195e28dfb6d5ba.png
[Center 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/c2befe456608462889a1347c169ca7da.png