URLConnection类常见的超时处理就是调用其setConnectTimeout和setReadTimeout方法：
setConnectTimeout：设置连接主机超时（单位：毫秒） setReadTimeout：设置从主机读取数据超时（单位：毫秒）还有一种比较另类的就是利用javaObject对象的wait()和notify()、notifyAll()方法，利用线程的等待和通知机制处理urlConnection的超时，下面直接贴代码：
publicclassHttpConnPRocessThreadimplementsRunnable {publicbooleanisStop =false;publicbooleanreadOK =false;privateHttpURLConnection reqConnection =null;publicThread readingThread;privateintreadLen;privateString msg =null;privateString reqMethod;privatebyte[] data;/*** ReadThread constructor comment.*/publicHttpConnProcessThread(HttpURLConnection reqConnection, String msg, String reqMethod ) {super();this.reqConnection =reqConnection;this.msg =msg;this.reqMethod =reqMethod;
}publicvoidrun() {
InputStream input=null;
OutputStream output=null;try{//reqConnection.connect();output =reqConnection.getOutputStream();if("post".equalsIgnoreCase(reqMethod) && msg !=null&& msg.length() >0)
{
output.write(msg.getBytes());
output.close();
output=null;
}//处理HTTP响应的返回状态信息intresponseCode = reqConnection.getResponseCode();//响应的代码if( responseCode != 200)
System.out.println("connect failed! responseCode = " + responseCode + " msg=" +reqConnection.getResponseMessage());
input=reqConnection.getInputStream();intlen;byte[] buf =newbyte[2048];
readLen= 0;
ByteArrayOutputStream outStream=newByteArrayOutputStream();//读取inputStreamwhile(!isStop)
{
len=input.read(buf);if(len <= 0)
{this.readOK =true;
input.close();
data=outStream.toByteArray();
break;
}
outStream.write(buf,0, len);
readLen+=len;
}
}catch( IOException ie)
{}catch(Exception e)
{}finally{try{
reqConnection.disconnect();if( input !=null)
input.close();if( output !=null)
output.close();//唤醒线程，跳出等待wakeUp();
}catch(Exception e)
{
}
}
}publicString getMessage(){if(!readOK)//超时{return"";
}if(readLen <= 0) {return"";
}returnnewString(data, 0, readLen);
}publicvoidstartUp() {this.readingThread =newThread(this);
readingThread.start();
}//唤醒线程，不再等待privatesynchronizedvoidwakeUp() {
notifyAll();
}publicsynchronizedvoidwaitForData(inttimeout)
{try{//指定超时时间，等待connection响应wait(timeout);
}catch(Exception e)
{
}if(!readOK)
{
isStop=true;try{//中断线程if( readingThread.isAlive() )
readingThread.interrupt();
}catch(Exception e)
{
}
}
}publicstaticmain(String[] args){
String msg="";
URL reqUrl=newURL("http://127.0.0.1:8080/");//建立URLConnection连接reqConnection =(HttpURLConnection) reqUrl.openConnection();
HttpConnProcessThread rec=newHttpConnProcessThread(reqConnection, msg, "post");
rec.startUp();
//如果顺利连接到并读完数据，则跳出等待，否则等待超时rec.waitForData(2000);
String retMessage=rec.getMessage();
}
}