请教高手.关于PrintWriter和HttpURLConnection的异常问题

Question

URL url=null;
HttpURLConnection http=null;
ResourceBundle rb=ResourceBundle.getBundle("app");
try{
url=new URL(rb.getString("m2m.map.geourl"));
http=(HttpURLConnection)url.openConnection();
            http.setDoOutput(true);
            http.setDoInput(true); 
            PrintWriter pw = new PrintWriter(new OutputStreamWriter(http.getOutputStream(),"UTF-8")); 
            pw.write(getXML(longitude,latitude));报以下异常
java.net.ConnectException: Connection timed out
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.Socket.connect(Socket.java:519)
        at java.net.Socket.connect(Socket.java:469)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:157)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
        at sun.net.www.http.HttpClient.New(HttpClient.java:306)
        at sun.net.www.http.HttpClient.New(HttpClient.java:323)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:788)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:729)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:654)
        at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:832)
        at com.sitech.common.util.MapUtil.reGeo(MapUtil.java:120)
        at com.sitech.wcmp.service.WcmpService.location(WcmpService.java:212)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)
        at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:98)
        at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
        at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
        at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
        at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at com.sitech.common.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:70)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
        at java.lang.Thread.run(Thread.java:619)在本地是不会出问题的,只有在服务器上才会出现问题.请问是否在端口上被限制了?
很急啊.项目很赶。谢谢大家了。.分不多。.求好心人帮忙

Answer 1

java.net.ConnectException:试图将套接字连接到远程地址和端口时发生错误的情况下，抛出此异常。这些错误通常发生在拒绝远程连接时（例如，没有任何进程在远程地址/端口上进行侦听）。Connection   timed   out:
原因大体有两个:1.连接对方服务器超时.(连接目标是存在的,但网络原因暂时未能连上) 
2.有可能是连接目标根本不存在,所以连接不了. 请先确定你的url是否正确，端口是否已被占用

Answer 2

楼上说的对，补充一句，你url连的机器是否起了服务

Answer 3

按有几个群，你不妨加进去,可以和大家一起讨论啊.........46986340,28039577,4804620                                                                                                                                           
在那里看看有无能回答你的,谢谢,LZ,甭忘了给俺分哦,谢谢LZ

Answer 4

java.net.ConnectException:试图将套接字连接到远程地址和端口时发生错误的情况下，抛出此异常。这些错误通常发生在拒绝远程连接时（例如，没有任何进程在远程地址/端口上进行侦听）。 Connection       timed       out: 
原因大体有两个:1.连接对方服务器超时.(连接目标是存在的,但网络原因暂时未能连上)   
2.有可能是连接目标根本不存在,所以连接不了.   请先确定你的url是否正确，端口是否已被占用