我使用HttpURLConnection连接到一个网站时,收到了ResponseCode = 404(HTTP_NOT_FOUND)的响应。但是在我的浏览器(IE)中打开该网站没有问题。
为什么会有这样的差异,我该怎么办?
谢谢,Pavan
这是我的程序:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
public class TestGet {
private static URL source;
public static void main(String[] args) {
doGet();
}
public static void doGet() {
try {
source = new URL("http://localhost:8080/");
System.out.println("Url is" + source.toString());
URLConnection connection = source.openConnection();
connection.setRequestProperty("User-Agent","Mozilla/5.0 ( compatible ) ");
connection.setRequestProperty("Accept","*/*");
connection.setDoInput(true);
connection.setDoOutput(true);
System.out.println(((HttpURLConnection) connection).getResponseCode());
BufferedReader rdr = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
StringBuffer b = new StringBuffer();
String line = null;
while (true) {
line = rdr.readLine();
if (line == null)
break;
b.append(line);
}
} catch (Exception e) {
e.printStackTrace();
System.err.println(e.toString());
}
}
}
堆栈跟踪
Url ishttp://localhost:8080/
404
java.io.FileNotFoundException: http://localhost:8080/
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at TestGet.doGet(TestGet.java:28)
at TestGet.main(TestGet.java:11)
Caused by: java.io.FileNotFoundException: http://localhost:8080/
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at TestGet.doGet(TestGet.java:26)
... 1 more
java.io.FileNotFoundException: http://localhost:8080/
((HttpURLConnection) urlc).getResponseCode()
给你什么? - gigadot