求助：java中http网络延时问题，为什么一直跳不出去

[zajize]

请高手帮我看一下这个程序，读出URL中的内容，但是对于那些需要很长时间才能打开的页面，该程序几个小时都跳不出来，我已经设置了urlConnection.setConnectTimeout(3000);urlConnection.setReadTimeout(10000);但觉得根本就不起作用，我想要的结果是如果该页面在设定的时间内没有读出来，就结束该程序的执行。希望高手解决一下
private String readURL(URL url){

if (url.getProtocol().compareTo("http") != 0)
return "";
try {
URLConnection urlConnection =(URLConnection) url.openConnection();
urlConnection.setConnectTimeout(3000);
urlConnection.setReadTimeout(10000);
InputStream urlStream = url.openStream();
String type = urlConnection.getContentType();
if (type == null)
return "";
type = type.substring(0,9);
if (type.compareTo("text/html") != 0)
return "";
byte b[] = new byte[1000];
int numRead = urlStream.read(b);
if(numRead==-1)
return "";
String content = new String(b, 0, numRead);
while (numRead != -1) {
numRead = urlStream.read(b);
if (numRead != -1) {
String newContent = new String(b, 0, numRead);
content += newContent;
}
}
urlStream.close();
return content;
}catch (IOException e) {
return "";
}

[zs_han]

UP

[gaow_2005]

那就自己写一个计时器吧！时间到了就跳出

[chensjmail]

url.openStream();
你好像是用URL方法的

public abstract void connect()

URLConnection类的connect这个方法才会对超时进行管理的，

你用URL类流连接，它当然不会对你在URLConnection类设置的超时进行管理啦。

[chensjmail]

URLConnection
有内有计时器了,呵呵，再写多浪费呀，呵呵

[jxcfh]

private String readURL(URL url)
	{

		if (url.getProtocol().compareTo("http") != 0)
			return doFailCase();

		HttpURLConnection httpConnection = null;// 这里可以定义成HttpURLConnection
		InputStream urlStream = null;

		try
		{
			httpConnection = (HttpURLConnection) url.openConnection();
			httpConnection.setConnectTimeout(3000);
			httpConnection.setReadTimeout(10000);

			httpConnection.connect();
			// urlConnection.getContentEncoding();可以根据字符集设置接收到字符串的编码

			urlStream = httpConnection.getInputStream();
			if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK)
			{
				String type = httpConnection.getContentType();
				if (type == null)
					return doFailCase();
				type = type.substring(0, 9);
				if (type.compareTo("text/html") != 0)
					return doFailCase();
				byte b[] = new byte[1000];
				int numRead = urlStream.read(b);
				if (numRead == -1)
					return doFailCase();
				String content = new String(b, 0, numRead);
				while (numRead != -1)
				{
					numRead = urlStream.read(b);
					if (numRead != -1)
					{
						String newContent = new String(b, 0, numRead);
						content += newContent;
					}
				}
				return content;
			}
			else
			{
				return doFailCase();
			}
		}
		catch (IOException e)
		{
			return doFailCase();
		}
		finally
		{
			if (null != urlStream)
			{
				try
				{
					urlStream.close();
				}
				catch (IOException e)
				{
				}
			}
		}
	}

	private String doFailCase()
	{
		return "";
	}

[zajize]

对网络编程不是特别懂，具体应该怎么改呀，能不能帮帮忙给改一下呀

[jxcfh]

或者把

InputStream urlStream = url.openStream();

换成

InputStream urlStream = urlConnection.getInputStream();

,个人认为你设置了urlConnection的连接时间，又不用urlConnection去获取输入流，所以程序会一直等待下去

[zhmt]

楼上说的没错，楼主太大意了

[zajize]

谢谢大家了，我正在改

[zajize]

可以了 再次谢谢大家 我去结贴

[hmsuccess]

URLConnection urlConnection =(URLConnection) url.openConnection(); 
InputStream urlStream = urlConnection.openStream(); 

openConnection() ---》 connect()