HttpURLConnection模拟 POST 动作出错

gc2001_xf 2012-01-05 11:40:15

我有下面一段代码，当把注释部分去掉后，会出错，请高人帮我看一下，不胜感激

不执行注释段代码，程序不会出错，URL也是可以访问的



import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import java.net.URLEncoder;

import java.nio.charset.Charset;

public class HelloWorld {

	public static void main(String[] args) throws IOException {

		HttpURLConnection con = null;

		

		

		String username="authenticityToken=9234f0328ba92059a816562d05988a1a8d5fc6fd";

	    username=URLEncoder.encode(username, "utf-8");

		URL url = new URL("http://10.224.104.178/admin/validateT");

		con =(HttpURLConnection) url.openConnection();

		

		/*

		con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

		con.setRequestProperty("Content-Length", "" +Integer.toString(username.getBytes().length));

		con.setRequestProperty("Content-Language", "en-US");

		

		con.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)" );

		

		con.setDoInput(true);

		con.setDoOutput(true);

		con.setRequestMethod("POST");

	    

	    con.getOutputStream().write(username.getBytes());

	    con.getOutputStream().flush();

	    con.getOutputStream().close();

		*/		

		BufferedReader br = null;

		String charset = charset(con.getContentEncoding(), con.getContentType());

		

		try {

			br = new BufferedReader(new InputStreamReader(con.getInputStream(), charset));

			for(String str = null; (str = br.readLine()) != null; ) {

			System.out.println(str);

		    }

		} finally {

		if(br != null) {

			br.close();

		}

		}

	}

	private static String charset(String encoding, String contentType) {

		if(encoding != null && Charset.isSupported(encoding)) {

			return encoding;

		}

		if(contentType == null) {

			return Charset.defaultCharset().name();

		}

		int index = contentType.indexOf("charset=");

		if(index < 0) {

			return Charset.defaultCharset().name();

		}

		String charset = contentType.substring(index + 8);

		if(!Charset.isSupported(charset)) {

			return Charset.defaultCharset().name();

		}

		System.out.println("charset="+charset);

		return charset;

	}

}

错误信息





Exception in thread "main" java.io.FileNotFoundException: http://10.224.104.178/admin/validateT

	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 HelloWorld.main(HelloWorld.java:39)

Caused by: java.io.FileNotFoundException: http://10.224.104.178/admin/validateT

	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

	at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)

	at java.net.URLConnection.getContentEncoding(Unknown Source)

	at HelloWorld.main(HelloWorld.java:36)