Java使用TCP實現(xiàn)數(shù)據(jù)傳輸實例詳解
TCP所提供服務(wù)的主要特點：
1．面向連接的傳輸；
2．端到端的通信；
3．高可靠性，確保傳輸數(shù)據(jù)的正確性，不出現(xiàn)丟失或亂序；
4．全雙工方式傳輸；
5．采用字節(jié)流方式，即以字節(jié)為單位傳輸字節(jié)序列；
6．緊急數(shù)據(jù)傳送功能。
TCP傳輸需要建立客戶端和服務(wù)器端，即Socket和Server Socket ， 建立連接后，通過Socket中的IO流進行數(shù)據(jù)的傳輸 。傳輸結(jié)束后關(guān)閉Socket。
客戶端和服務(wù)器端是兩個獨立的應(yīng)用程序。
以下是實現(xiàn)基本的TCP數(shù)據(jù)傳輸?shù)腄emo code：
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package javase.day18; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.net.ServerSocket; import java.net.Socket; public class TransTextDemo { public static void main(String[] args) { } } class TcpClient2{ public static void main(String[] args) throws Exception{ System.out.println("client start..."); Socket s = new Socket("192.168.1.2",10005); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream())); String sendDataStr=null; while((sendDataStr=br.readLine())!=null){ if(sendDataStr.equals("bye")){ break; } bw.write(sendDataStr); bw.newLine(); bw.flush(); } bw.close(); } } class TcpServer2{ public static void main(String[] args) throws Exception{ System.out.println("server start..."); ServerSocket ss = new ServerSocket(10005); Socket s = ss.accept(); BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream())); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream())); String receiveDataStr=null; while((receiveDataStr=br.readLine())!=null){ if(receiveDataStr.equals("bye")){ break; } System.out.println("receive data:"+receiveDataStr); } } } |
使用TCP實現(xiàn)文本文件上傳的Demo code：
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package javase.day18; import java.io.BufferedReader; import java.io.FileReader; import java.io.FileWriter; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; public class UploadText { public static void main(String[] args) { // TODO Auto-generated method stub } } class TextServer{ public static void main(String[] args) throws Exception{ System.out.println("Server start..."); ServerSocket ss = new ServerSocket(10008); Socket s = ss.accept(); BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream())); PrintWriter out = new PrintWriter(new FileWriter("C:\\java_test\\server.txt"),true); String line=null; while((line=br.readLine())!=null){ System.out.println(line); out.println(line); } PrintWriter pw = new PrintWriter(new OutputStreamWriter(s.getOutputStream()),true); pw.println("upload successful"); pw.close(); s.close(); ss.close(); } } class TextClient{ public static void main(String[] args) throws Exception{ System.out.println("Client start..."); Socket clientSocket = new Socket("192.168.1.2",10008); BufferedReader br = new BufferedReader(new FileReader("C:\\java_test\\SystemDemo.java")); PrintWriter out = new PrintWriter(clientSocket.getOutputStream(),true); String line=null; while((line=br.readLine())!=null){ System.out.println(line); out.println(line); } clientSocket.shutdownOutput(); BufferedReader br2 = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); String confirmMsgStr=br2.readLine(); System.out.println(confirmMsgStr); br2.close(); clientSocket.close(); } } |
實現(xiàn)圖片上傳的Demo code：
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package javase.day18; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.net.ServerSocket; import java.net.Socket; public class UploadImage { public static void main(String[] args) { } } class ImageClient{ public static void main(String[] args) throws Exception{ Socket imageClientSocket = new Socket("192.168.1.2",10010); BufferedInputStream bis = new BufferedInputStream(new FileInputStream("C:\\java_test\\client\\生活用品01.jpg")); BufferedOutputStream bos = new BufferedOutputStream(imageClientSocket.getOutputStream()); byte[] buf = new byte[1024*100]; int len = 0 ; while((len=bis.read(buf))!=-1){ bos.write(buf,0,len); } imageClientSocket.shutdownOutput(); BufferedInputStream bis2 = new BufferedInputStream(imageClientSocket.getInputStream()); byte[] buf2 = new byte[1024]; int len2 = 0 ; while((len2=bis2.read(buf2))!=-1){ System.out.println(new String(buf2,0,len2)); } bis.close(); imageClientSocket.close(); } } class ImageServer{ public static void main(String[] args) throws Exception{ ServerSocket ss = new ServerSocket(10010); Socket s = ss.accept(); BufferedInputStream bis = new BufferedInputStream(s.getInputStream()); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("C:\\java_test\\server\\生活用品01.jpg")); byte[] buf = new byte[1024*100]; int len = 0 ; while((len=bis.read(buf))!=-1){ bos.write(buf, 0, len); } BufferedOutputStream bos2 = new BufferedOutputStream(s.getOutputStream()); bos2.write("upload successful".getBytes()); bos2.close(); s.close(); ss.close(); } } |
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原文鏈接：http://blog.csdn.net/alex_zhuang/article/details/6945650
