Question

当我在chrome中运行localhost时，我收到此错误。

我的Jsp计划：

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@page contentType="application/xml" trimDirectiveWhitespaces="true" %>

<c:choose>
  <c:when test='${param.event == "NewCall"}'>
        <%            
        String moderator_no1 =request.getParameter("moderator_no");
        String participant_no = request.getParameter("participant_no");
        String conference_id = request.getParameter("conference_id");
        System.out.println("New call");
        out.print("<?xml version=\"1.0\" encoding=\"UTF-8\"?><response><conference moderator=\"true\" caller_onhold_music=\"default\" record=\"true\">"+conference_id+"</conference></response>");
        System.out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?><response><conference moderator=\"true\" caller_onhold_music=\"default\" record=\"true\">"+conference_id+"</conference></response>");
        session.setAttribute("state", "conferenceStarted");
        %>
    </c:when>
    <c:when test='${(param.event == "Conference" || param.event == "Hangup" || param.event == "Disconnect")}' >
        <%        
            out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?><response></response>");
            String session_id = request.getParameter("sid");
            out.println(session_id);
            System.out.println(session_id);
            String called_no = request.getParameter("cid");
            System.out.println(called_no);
            out.println(called_no);
            String actualtime = request.getParameter("total_call_duration");
            out.println(actualtime);
            System.out.println(actualtime);
            String start_time = request.getParameter("start_time");
            out.println(start_time);
            System.out.println(start_time);
            String end_time = request.getParameter("time");
            out.println(end_time);
            System.out.println(end_time);
        %>
    </c:when>
</c:choose>

Chrome中的错误输出：

This page contains the following errors:

error on line 2 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.

当我给出event = conference时，我可以在我的日志文件夹中打印null但是在chrome中我得到了上述错误。

请帮帮我。

Answer 1

原因是，

param.event == "Conference"

时

首先打印响应

<?xml version="1.0" encoding="UTF-8"?><response></response>

然后打印一些其他变量，如

session_id，called_no，actualtime等。

所以最后xml可能看起来像这样

<?xml version="1.0" encoding="UTF-8"?><response></response> 123456xyz

这将导致error: Extra content at the end of the document。

您必须决定如何解决此问题。

误差=＆GT;第1行第2行的错误：文档末尾的额外内容

1 个答案: