致命错误不允许处理指令匹配“[xX] [mM] [lL]”
我在使用dom解析器解析我的xml时遇到以下异常。 url“ ”http://www.xyz.com/ABC.aspx?accessCode = ...... & vin = GJHHFJHFJHFGF6788 & reportType = 3“ 为每个vin参数返回一个xml。致命错误不允许处理指令匹配“[xX] [mM] [lL]”
下面是由上述URL
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<VINdecode Version="1.0.0" Report_Type="LITE" Date="11/1/2012">
<VIN Number="GJHHFJHFJHFGF6788" Status="SUCCESS">
<Vehicle VINdecode_Vehicle_ID="26870" Model_Year="2004" Make="Volkswagen" Model="Touareg" Trim_Level="V6">
<Item Key="Model Year" Value="2004" Unit="" />
<Item Key="Make" Value="Volkswagen" Unit="" />
<Item Key="Model" Value="Touareg" Unit="" />
<Item Key="Trim Level" Value="V6" Unit="" />
<Item Key="Manufactured in" Value="GERMANY" Unit="" />
<Item Key="Body Style" Value="SPORT UTILITY 2-DR" Unit="" />
<Item Key="Engine Type" Value="3.2L V6 DOHC 24V" Unit="" />
</Vehicle>
</VIN>
</VINdecode>
返回的XML这里是我使用解析XML从与VIN的URL返回的代码。
public VIN getVINExpansion(String vin)
{
if(vin.length() != 17)
return null;
VIN vehicle = null;
try
{
String url="http://www.xyz.com/ABC.aspx?accessCode=........&vin="
+ vin + "&reportType=3";
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(url); **// I get Exception in this line**
NodeList vinlist = doc.getElementsByTagName("VIN");
// rest goes here
}
catch(Exception e)
{
e.printStackTrace();
}
return vin;
}
当我通过一个“VIN”参数上面的函数从通过RPC调用我的客户端,我得到正确的响应。但几个小时后(比如说4-5小时),当我传递相同的vin参数时,我会得到例外。之后,我继续得到这个异常,直到我重新启动我的tomcat服务器。重新启动tomcat服务器后,我再次得到正确的响应4-5小时,直到它开始失败。
例外,我得到:
[Fatal Error] xml_ABC.aspx?accessCode=.......&vin=GJHHFJHFJHFGF6788&reportType=3:4:6: The processing instruction target matching "[xX][mM][lL]" is not allowed.
org.xml.sax.SAXParseException;
systemId: http://www.xyz.com/ABC.aspx?accessCode=......&vin=GJHHFJHFJHFGF6788&reportType=3; lineNumber: 4; columnNumber: 6; The processing instruction target matching "[xX][mM][lL]" is not allowed.
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:177)
我不知道为什么会失败,但同样的问题是与我的确切原因: 当我试图解析使用DocumentBuilder.parse URL响应XML( url),几次试用后解析失败。
当我使用下面的函数获取XML响应:
public String getHttpGetResponseString(String url) throws Exception
{
HttpClient httpclient = new DefaultHttpClient();
String responseBody ="";
try {
HttpGet httpget = new HttpGet(url);
System.out.println("executing request " + httpget.getURI());
// Create a response handler
ResponseHandler<String> responseHandler = new BasicResponseHandler();
responseBody = httpclient.execute(httpget, responseHandler);
}
finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
httpclient.getConnectionManager().shutdown();
}
return responseBody;
}
然后加载的XML DOM到,我摆脱了异常。 希望这可以解决你的问题。
非常感谢你!!现在我没有得到任何例外。我从过去8小时监控我的服务器。一切似乎都好。 –
这是一个彻头彻尾的黑客,但下面的任何处理指令变为标签....记住....哈哈!
public static String formatXml(String xml)
{
String result = doFormatXml(xml);
if (result.equals(xml))
{
result = doFormatXml(xml + "</xml>");
}
return result;
}
public static String doFormatXml(String xml)
{
xml = xml.replaceAll("[?][>]", "/>");
xml = xml.replaceAll("[<][?]", "<");
try{
Transformer serializer= SAXTransformerFactory.newInstance().newTransformer();
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
Source xmlSource=new SAXSource(new InputSource(new ByteArrayInputStream(xml.getBytes())));
StreamResult res = new StreamResult(new ByteArrayOutputStream());
serializer.transform(xmlSource, res);
return new String(((ByteArrayOutputStream)res.getOutputStream()).toByteArray());
}catch(Exception e){
return xml;
}
}
这么称呼它像这样:
String formattedXml = formatXml(unformattedXml);
我想以某种方式“形成不良的”输出XML或东西,第二次检查,被它试图解析XML是什么? – rogerdpack