tcp接收多包的问题?

Question

 public void CreateConnection() throws Exception {   
        try {   
            socket = new Socket(ip, port);   
        } catch (Exception e) {   
            e.printStackTrace();   
            if (socket != null)   
                socket.close();   
            throw e;   
        } finally {   
        }   
    }   
    public void sendMessage(String sendMessage) throws Exception {   
        try {   
            out = new DataOutputStream(socket.getOutputStream());   
             out.write( sendMessage.getBytes() );          
        } catch (Exception e) {   
         //System.out.println("www..eeeeeee.....");
            e.printStackTrace();   
            if (out != null)   
                out.close();   
            throw e;   
        } finally {   
        }   
    }   
    public DataInputStream getMessageStream() throws Exception {   
        try {   
         getMessageStream = new DataInputStream(new BufferedInputStream(socket.getInputStream()));   
         return getMessageStream;   
        } catch (Exception e) {   
            e.printStackTrace();   
            if (getMessageStream != null)   
                getMessageStream.close();   
            throw e;   
        } finally {   
        }   
    } 
我把tcp接收发送写成了javabean,然后其他地方调用的是:
try{
ClientSocket1.IpSocket("192.168.5.244",8888);
ClientSocket1.CreateConnection();
ClientSocket1.sendMessage(Message);
for(int tt=0;tt<4;tt++)
{
isdata=ClientSocket1.getMessageStream_cx();
}
ClientSocket1.shutDownConnection();
}
catch(Exception e){
System.out.println("YUYUYUYUYUYUYUYUYUYUYUY");
}
现在我只能收到2包数据,然后就直接从异常里面出来了,对java下面的tcp没有研究,谁能帮助一下啊

Answer 1

Exception:java.io.EOFException是这个异常?为什么啊 

Answer 2

catch (Exception e) 
{ 
System.out.println("Exception:"+e.toString()); 
}
异常:Exception:java.io.EOFException

Answer 3

java.io.EOFException
at java.io.DataInputStream.readByte(Unknown Source)
at com.ClientSocket.getMessageStream_cx(ClientSocket.java:126)
at org.apache.jsp.Cj9011_005flldata_jsp._jspService(Cj9011_005flldata_jsp.java:147)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
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 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(Unknown Source)具体的错误

Answer 4

发现是接收的地方有问题
for ( i = 0; i < 24; i++) {
        //if(getMessageStream.read()!=-1)
      mapArray[i] = getMessageStream.readByte();
      }
使用了readByte就会出现异常,我在上面加了判断,还是一样,但是我如果封掉readbyte 的话,程序是能正常接收多包数据?
如果不用readbyte我该怎么来保存得到的数据呢???

Answer 5

呵呵,问题继续深入了,使用:
BufferedReader   socketReader   =   new   BufferedReader(new   InputStreamReader(socket.getInputStream())); 
         String   recvMsg   =   socketReader.readLine(); 
打印出来的数据,c服务程序下面发过来的多包程序,他一下子都打印出来了,说明他一下子全收过来了,所以当我多次去执行接受的时候,收不到数据了，所以出现异常?如果按我的理解,我就有疑问了?不是分多个包发过来的吗?那怎么来区别,还是程序上有那些要注意的地方

Answer 6

如果是一个数据流就能收全的话也有问题,我数据量小的话,我是能处理的,但如果是大数量量的话,这样是不是有问题??
java socket下面没有多包概念?

Answer 7

发现是接收的地方有问题
for ( i = 0; i < 24; i++) {
//if(getMessageStream.read()!=-1)
mapArray[i] = getMessageStream.readByte();
}