我正在尝试读取使用 httpdoPost
方法发布的 XML 文件。使用 SAXParser 解析时会抛出异常:
Content is not allowed in prolog.
doPost 代码是:
protected void doPost(HttpServletRequest request, HttpServletResponse response)
{
ServletInputStream httpIn = request.getInputStream();
byte[] httpInData = new byte[request.getContentLength()];
StringBuffer readBuffer = new StringBuffer();
int retVal = -1;
while ((retVal = httpIn.read(httpInData)) != -1)
{
for (int i=0; i<retVal; i++)
{
readBuffer.append(Character.toString((char)httpInData[i]));
}
}
System.out.println("XML Received" + readBuffer);
try
{
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
ByteArrayInputStream inputStream = new ByteArrayInputStream(
readBuffer.toString().getBytes("UTF-8"));
final XmlParser xmlParser = new XmlParser();
parser.parse(inputStream, xmlParser);
}
catch (Exception e)
{
System.out.println("Exception parsing the xml request" + e);
}
}
这是我正在测试的 JUnit:
public static void main(String args[])
{
StringBuffer buffer = new StringBuffer();
buffer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
buffer.append("<person>");
buffer.append("<name>abc</name>");
buffer.append("<age>25</age>");
buffer.append("</person>");
try
{
urlParameters = URLEncoder.encode(buffer.toString(), "UTF-8");
}
catch (Exception e1)
{
e1.printStackTrace();
}
String targetURL = "http://localhost:8888/TestService";
URL url;
HttpURLConnection connection = null;
try
{
//Create connection
url = new URL(targetURL);
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/xml");
connection.setRequestProperty("Content-Length", "" +
Integer.toString(urlParameters.getBytes("UTF-8").length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setUseCaches (false);
connection.setDoInput(true);
connection.setDoOutput(true);
//Send request
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
wr.writeBytes (urlParameters);
wr.flush ();
wr.close ();
}
catch (Exception e)
{
e.printStackTrace();
}
我得到的 servlet 中的 XML 输出是这样的:
XML Received %3C%3Fxml+version%3D%221.0%22+encoding%3D%22UTF-8%22%3F%3E%3Cperson%3E%
所以这会在 SAXparser 中引发异常:
我究竟做错了什么?我是以错误的方式发送 XML 还是以错误的方式读取它?