本篇文章主要介绍了java中处理socket通信过程中粘包的情况，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

这两天学习了java中处理socket通信过程中粘包的情况，而且很重要，所以，今天添加一点小笔记。

处理粘包程序是客户端的接受消息线程：

客户端：import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.io.Reader;

import java.net.Socket;

import java.nio.CharBuffer;

public class TestSocketClient {

public static void main(String[] args) {

// TODO Auto-generated method stub

new TestSocketClient().start();

}

class SendThread extends Thread{

private Socket socket;

public SendThread(Socket socket){

this.socket=socket;

}

@Override

public void run(){

while(true){

try{

Thread.sleep(1000);

String send=""+System.currentTimeMillis()+"";

PrintWriter pw=new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));

pw.write(send);

pw.flush();

}catch(Exception e){

e.printStackTrace();

}

}

}

}

class ReceiveThread extends Thread{

private Socket socket;

private volatile byte[] bytes=new byte[0];

public ReceiveThread(Socket socket){

this.socket=socket;

}

public byte[] mergebyte(byte[] a,byte[] b,int begin,int end){

byte[] add=new byte[a.length+end-begin];

int i=0;

for(i=0;i

add[i]=a[i];

}

for(int k=begin;k

add[i]=b[k];

}

return add;

}

@Override

public void run(){

while(true){

try{

InputStream reader=socket.getInputStream();

if(bytes.length<2){

byte[] head=new byte[2-bytes.length];

int couter=reader.read(head);

if(couter<0){

continue;

}

bytes=mergebyte(bytes,head,0,couter);

if(couter<2){

continue;

}

}

//下面这个值请注意，一定要取2长度的字节子数组作为报文长度，你懂得

byte[] temp=new byte[0];

temp=mergebyte(temp,bytes,0,2);

String templength=new String(temp);

int bodylength=Integer.parseInt(templength);

if(bytes.length-2

byte[] body=new byte[bodylength+2-bytes.length];

int couter=reader.read(body);

if(couter<0){

continue;

}

bytes=mergebyte(bytes,body,0,couter);

if(couter

continue;

}

}

byte[] body=new byte[0];

body=mergebyte(body, bytes, 2, bytes.length);

System.out.println("client receive body: "+new String(body));

bytes=new byte[0];

}catch(Exception e){

e.printStackTrace();

}

}

}

}

public void start(){

try{

Socket socket=new Socket("127.0.0.1",18889);

new SendThread(socket).start();

new ReceiveThread(socket).start();

}catch(Exception e){

e.printStackTrace();

}

}

}

服务端：package com.meituan.service.bankgate.gateway;

/**

* Created by cqx on 16/7/19.

*/

import java.io.*;

import java.net.ServerSocket;

import java.net.Socket;

import java.nio.CharBuffer;

import java.util.Date;

public class TESTAHAHHA {

private final static String SOAP_BEGIN = "

private final static String SOAP_END = "

";

public static void main(String[] args) {

// TODO Auto-generated method stub

TESTAHAHHA testserver=new TESTAHAHHA();

testserver.start();

}

public void start(){

try{

ServerSocket serversocket=new ServerSocket(18889);

while(true){

Socket socket=serversocket.accept();

new SocketThread(socket).start();

}

}catch(Exception e){

e.printStackTrace();

}

}

class SocketThread extends Thread{

private Socket socket;

private String temp;

public SocketThread(Socket socket){

this.socket=socket;

}

public Socket getsocket(){

return this.socket;

}

public void setsocjet(Socket socket){

this.socket=socket;

}

@Override

public void run(){

try{

Reader reader=new InputStreamReader(socket.getInputStream());

// Writer writer=new PrintWriter(new OutputStreamWriter(socket.getOutputStream(),"UTF-8"));

OutputStream writer=socket.getOutputStream();

CharBuffer charbuffer=CharBuffer.allocate(8192);

int readindex=-1;

while((readindex=reader.read(charbuffer))!=-1){

charbuffer.flip();

temp+=charbuffer.toString();

if(temp.indexOf(SOAP_BEGIN)!=-1 && temp.indexOf(SOAP_END)!=-1){

//System.out.println(new Date().toLocaleString()+"server:"+temp);

temp="";

String str="receive the soap message hahahah";

byte[] headbytes=str.getBytes();

int length=headbytes.length;

String l=String.valueOf(length);

byte[] lengthbytes=l.getBytes();

byte[] bytes=new byte[length+lengthbytes.length];

int i=0;

for(i=0;i

bytes[i]=lengthbytes[i];

}

for(int j=i,k=0;k

bytes[j]=headbytes[k];

}

System.out.println("server send:"+new String(bytes));

writer.write(bytes);

writer.flush();

}else if(temp.indexOf(SOAP_BEGIN)!=-1){

temp=temp.substring(temp.indexOf(SOAP_BEGIN));

}

if(temp.length()>1024*16){

break;

}

}

}catch(Exception e){

e.printStackTrace();

}finally{

if(socket!=null){

try{

if(!socket.isClosed()){

socket.close();

}

}catch(Exception e){

e.printStackTrace();

}

}

}

}

}

}

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