Java 为什么在从thid party url读取xml时出现此异常

我正在编写一个程序来连接到第三方url并从那里读取xml。虽然它在windows环境下tomcat服务器上的本地机器上运行得很好，但当我在linux环境下的weblogic上部署它时，我得到了一个异常。谢谢你的帮助。提前谢谢

以下是代码片段：

HttpURLConnection connection = (HttpURLConnection)url.openConnection();
  connection.setRequestMethod("GET");
      connection.setDoInput(true);
   connection.connect();

   log.info("Confirmation URL getURL(): "+connection.getURL());
   log.info("Confirmation URL getContentEncoding: "+connection.getContentEncoding());
   log.info("Confirmation URL getContentType: "+connection.getContentType());
   log.info("Confirmation URL getContentLength: "+connection.getContentLength());
   log.info("Confirmation URL getContent(): "+connection.getContent());
   log.info("Confirmation URL getAllowUserInteraction(): "+connection.getAllowUserInteraction());
   log.info("Confirmation URL getClass(): "+connection.getClass());
   log.info("Confirmation URL getHeaderFields(): "+connection.getHeaderFields());
   Map<String,List<String>> requestProperties = connection.getRequestProperties();

   if(requestProperties!=null){
    Iterator<String> keysIterator = requestProperties.keySet().iterator();
    while (keysIterator.hasNext()) {
     String key = (String) keysIterator.next();
     log.info("********* RequestProperty "+key+" : "+requestProperties.get(key));
    }
   }
   else {
    log.info("requestProperties is null ");
   }



      InputStream xmlcontent = connection.getInputStream();

   Date date = new Date();

   DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory
     .newInstance();
   DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
   Document doc = docBuilder.parse(xmlcontent); // <-- exception thrown here

---

例外情况表明：

文档中根元素后面的标记必须格式正确

因此，我希望通过的文档是无效的，因为它不是格式良好的XML。为了解决这个问题，最好在调试期间将流的输出捕获到字符串中（或将其重定向到文件等），这样您就可以准确地调查哪些字符可以传递到另一端

---

出现这种情况的原因有多种（例如，您从Web服务器收到404/500错误-HTML页面几乎肯定是“接近XML”，但格式不正确）。您需要查看实际数据以了解发生了什么，因为我认为这确实是来自服务器的错误消息。

异常状态表明

文档中根元素后面的标记必须格式正确

因此，我希望通过的文档是无效的，因为它不是格式良好的XML。为了解决这个问题，最好在调试期间将流的输出捕获到字符串中（或将其重定向到文件等），这样您就可以准确地调查哪些字符可以传递到另一端

出现这种情况的原因有多种（例如，您从Web服务器收到404/500错误-HTML页面几乎肯定是“接近XML”，但格式不正确）。您需要查看实际数据以了解发生了什么，因为我希望这确实是来自服务器的错误消息。

谢谢您的回复。 事实上，返回的服务器状态是301，所以在从其中一个博客获得线索后(http://tech.rationalaspect.com/2010/10/301-moved-permanently-urlconnection-and.html)在谷歌搜索时，我只是在基本url的末尾添加了一个“/”，这对我来说很有效。尽管如此，我不能完全肯定这有什么不同。

谢谢您的回复。

---

事实上，返回的服务器状态是301，所以在从其中一个博客获得线索后(http://tech.rationalaspect.com/2010/10/301-moved-permanently-urlconnection-and.html)在谷歌搜索时，我只是在基本url的末尾添加了一个“/”，这对我来说很有效。尽管如此，我不能完全确定这会有什么不同。

请重新格式化代码：只需在代码行开头加4个空格（或一个制表符）请重新格式化代码：只需在代码行开头加4个空格（或一个制表符）

org.xml.sax.SAXParseException: The markup in the document following the root element must be well-formed.
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
 at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
 at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$TrailingMiscDriver.next(XMLDocumentScannerImpl.java:1423)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
 at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
 at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:235)
 at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
 at weblogic.xml.jaxp.RegistryDocumentBuilder.parse(RegistryDocumentBuilder.java:163)
 at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.readXml(OrderConfirmationTask.java:337)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.getFeed(OrderConfirmationTask.java:213)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.generateUrlToHit(OrderConfirmationTask.java:161)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.processRequest(OrderConfirmationTask.java:112)
 at com.scea.shoppingcart.controller.OrderConfirmationJob.executeInternal(OrderConfirmationJob.java:22)
 at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
 at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
 at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
2011-01-20 16:06:01,539 [ERROR] - ==Exception processing Order Confirmation XML !!!==The markup in the document following the root element must be well-formed.=stackTrace=org.xml.sax.SAXParseException: The markup in the document following the root element must be well-formed.
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
 at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
 at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1414)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$TrailingMiscDriver.next(XMLDocumentScannerImpl.java:1423)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
 at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
 at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
 at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
 at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:235)
 at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
 at weblogic.xml.jaxp.RegistryDocumentBuilder.parse(RegistryDocumentBuilder.java:163)
 at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.readXml(OrderConfirmationTask.java:337)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.getFeed(OrderConfirmationTask.java:213)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.generateUrlToHit(OrderConfirmationTask.java:161)
 at com.scea.shoppingcart.controller.OrderConfirmationTask.processRequest(OrderConfirmationTask.java:112)
 at com.scea.shoppingcart.controller.OrderConfirmationJob.executeInternal(OrderConfirmationJob.java:22)
 at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
 at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
 at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)