Question

我想在请求花费太多时间编写html文件时将处理栏放在我的页面上。所以我在Strust2中使用了execAndWait拦截器，但是页面无法在wait.jsp上重定向。

Struts.xml

<action name="htmlUtility"          
       class="com.support.action.ActivityAction"                               method="htmlUtility">
        <interceptor-ref name="execAndWait">
            <param name="delay">1000</param>
            <param name="delaySleepInterval">500</param>
        </interceptor-ref>
     <result name="wait">/pages/reportingview/ftl/wait.jsp</result>
          <result name="success" type="stream">
      <param name="contentType">application/octet-stream</param>
      <param name="inputName">inputStream</param>
      <param name="contentDisposition">attachment;filename="${filename}"</param>
      <param name="bufferSize">1024</param>
    </result>
</action>

Wait.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
 <html>  
 <head>  
 <title>wait</title>  
<meta http-equiv="refresh" content="0.5;url='<s:url includeParams="all"       />'">  
</head>  
<body>  
<p>your request is processing...</p>  
<img src="ajax-loader.gif"/>  
</body>  
</html>

ActivityAction -

  private InputStream saveAsHTML() {

    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    PrintStream printhtml = new PrintStream(buffer);
    String htmlheader="<html><style type='text/css'>.dataTable "
                     + "{width:100%;    font-family:Verdana, Geneva, sans-serif;border-top:1px solid #ccc; border-right:1px solid #ccc;+}"
                     + ".dataTable th {background:#f1f1f1;  text-align:left;padding:5px;font-weight:normal; border-bottom:1px solid #ccc;"
                     + "    border-left:1px solid #ccc;}.dataTable tr {}.dataTable td { padding:5px;border-bottom:1px solid #ccc;border-left:1px solid #ccc;}.txtCenterAlign "
                     + "{text-align:center !important;}.transparentBg{ background:transparent !important;}</style><head>";
    if(activityType.equalsIgnoreCase(SupportWebConstants.ACCESSPOINT_CONSTANT)){

        htmlheader+="<title>Access Point Activity Report</title></head><body> <table width='100%' border='0' cellpadding='0' cellspacing='0' class='dataTable'><thead> <tr>"
                + "<th colspan='9' class='txtCenterAlign'>Access Point Activity Report</th></tr><tr>";

        }
    else
        {
            htmlheader+="<title>Credential Holder Activity Report</title></head><body> <table width='100%' border='0' cellpadding='0' cellspacing='0' class='dataTable'><thead> <tr>"
                    + "<th colspan='9' class='txtCenterAlign'>Credential Holder Activity Report</th></tr><tr>";

        }

    for (String columnName : ReportHeaderMapper.getColumnList(activityType)) {

        htmlheader+= "<th class='transparentBg'><b>"+columnName+"</b></th>";

            }

        htmlheader+="</tr></thead> <tbody>";


     String tableData="";
     String htmlfooter=" </tbody></body></html>";


     activityList    = activityDTOList.getActivityDTOs();
     ReportHeaderMapper.setData(activityList);
     for (List<String> activityDTO : ReportHeaderMapper.getAccessPointAllRows(activityType)) {
         tableData= tableData+"<tr>";
            for (String data : activityDTO) {
                tableData+= "<td>"+data+"</td>";
            }
            tableData=tableData+"</tr>";
        }
     printhtml.println(htmlheader+tableData+htmlfooter);
     printhtml.close();
    LOGGER.info("HTML file created successfully."); 
    LOGGER.info("HTML activityList size" + activityList.size());
 return new ByteArrayInputStream(buffer.toByteArray());
}

当我生成请求时，我得到以下错误

HTTP状态404 - 没有为操作定义结果   com.narendra.stg.Sdg.support.action.ActivityAction和结果错误

输入状态报告

消息没有为操作定义结果   om.narendra.stg.Sdg.support.action.ActivityAction和结果错误

说明请求的资源不可用。

Answer 1

由于某种原因，您的操作返回“错误”作为结果类型。

检查返回错误的原因，可能是在方法执行之前它在返回成功之前的意外。

还要将返回名称添加为错误并重定向到某个error.jsp页面，这就是您的错误所在

没有为行动定义任何结果 com.narendra.stg.Sdg.support.action.ActivityAction和结果错误

Answer 2

执行操作所需的默认拦截器堆栈。当覆盖拦截器时，您不包括defaultStack。请尝试以下操作配置

<action name="htmlUtility"          
   class="com.assaabloy.stg.support.ActivityAction"                               method="htmlUtility">
    <interceptor-ref name="defaultStack"/>
    <interceptor-ref name="execAndWait">
        <param name="delay">1000</param>
        <param name="delaySleepInterval">500</param>
    </interceptor-ref>
 <result name="wait">/pages/reportingview/ftl/wait.jsp</result>
      <result name="success" type="stream">
  <param name="contentType">application/octet-stream</param>
  <param name="inputName">inputStream</param>
  <param name="contentDisposition">attachment;filename="${filename}"</param>
  <param name="bufferSize">1024</param>
</result>
</action>

应该有一个拦截器返回error结果，这个结果可以像this answer一样全局配置。

不在Struts2中的execAndWait拦截器中的wait.jsp页面上重定向

2 个答案: