url中参数的问题

[Mark31]

这是一个通过url获取网页的小函数。
为什么当url是
http://www.google.cn 和 http://www.baidu.com/s?wd=abc
时程序能获取到网页，而当url是
http://www.google.cn/search?q=abc
时，程序抛出了这样的异常：
java.io.IOException: Server returned HTTP response code: 403 for URL: http://www.google.cn/search?q=abc
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1241)

这是怎么回事呢？怎么解决这个问题呢？

下面是函数代码：

private void gotoURL(java.awt.event.ActionEvent evt) {
// After clicked the button:
BufferedReader infile = null;
URL url = null;
HttpURLConnection httpURLCon = null;

try {
url = new URL(jtfURL.getText().trim());


httpURLCon = (HttpURLConnection)url.openConnection();

httpURLCon.connect();

InputStream is = httpURLCon.getInputStream();

infile = new BufferedReader(new InputStreamReader(is));

String inLine;

while ((inLine = infile.readLine()) != null ) {
jtaContent.append(inLine + '\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
infile.close();
}
catch (IOException ex) {}
}
}

[火龙果被占用了]

楼主可以看看这个帖子，帖主在请求时设置了一下 HTTP 的头（就在楼主的页面中有代码）

http://topic.csdn.net/u/20080528/19/4455daae-e771-4445-be83-aa794cd70244.html