Java基於Socket的文件傳輸完成辦法。本站提示廣大學習愛好者：（Java基於Socket的文件傳輸完成辦法）文章只能為提供參考，不一定能成為您想要的結果。以下是Java基於Socket的文件傳輸完成辦法正文
本文實例講述了Java基於Socket的文件傳輸完成辦法。分享給年夜家供年夜家參考，詳細以下：
1. Java代碼以下：
package sterning;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ServerTest {
int port = 8821;
void start() {
Socket s = null;
try {
ServerSocket ss = new ServerSocket(port);
while (true) {
// 選擇停止傳輸的文件
String filePath = "D:\\lib.rar";
File fi = new File(filePath);
System.out.println("文件長度:" + (int) fi.length());
// public Socket accept() throws
// IOException偵聽並接收到此套接字的銜接。此辦法在停止銜接之前一向壅塞。
s = ss.accept();
System.out.println("樹立socket鏈接");
DataInputStream dis = new DataInputStream(new BufferedInputStream(s.getInputStream()));
dis.readByte();
DataInputStream fis = new DataInputStream(new BufferedInputStream(new FileInputStream(filePath)));
DataOutputStream ps = new DataOutputStream(s.getOutputStream());
//將文件名及長度傳給客戶端。這裡要真正實用一切平台，例如中文名的處置，還須要加工，詳細可以拜見Think In Java 4th裡有現成的代碼。
ps.writeUTF(fi.getName());
ps.flush();
ps.writeLong((long) fi.length());
ps.flush();
int bufferSize = 8192;
byte[] buf = new byte[bufferSize];
while (true) {
int read = 0;
if (fis != null) {
read = fis.read(buf);
}
if (read == -1) {
break;
}
ps.write(buf, 0, read);
}
ps.flush();
// 留意封閉socket鏈接哦，否則客戶端會期待server的數據過去，
// 直到socket超時，招致數據不完全。
fis.close();
s.close();
System.out.println("文件傳輸完成");
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String arg[]) {
new ServerTest().start();
}
}
2.socket的Util幫助類
package sterning;
import java.net.*;
import java.io.*;
public class ClientSocket {
private String ip;
private int port;
private Socket socket = null;
DataOutputStream out = null;
DataInputStream getMessageStream = null;
public ClientSocket(String ip, int port) {
this.ip = ip;
this.port = port;
}
/** *//**
* 創立socket銜接
*
* @throws Exception
* exception
*/
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());
if (sendMessage.equals("Windows")) {
out.writeByte(0x1);
out.flush();
return;
}
if (sendMessage.equals("Unix")) {
out.writeByte(0x2);
out.flush();
return;
}
if (sendMessage.equals("Linux")) {
out.writeByte(0x3);
out.flush();
} else {
out.writeUTF(sendMessage);
out.flush();
}
} catch (Exception e) {
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 {
}
}
public void shutDownConnection() {
try {
if (out != null)
out.close();
if (getMessageStream != null)
getMessageStream.close();
if (socket != null)
socket.close();
} catch (Exception e) {
}
}
}
3.客戶端
package sterning;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
public class ClientTest {
private ClientSocket cs = null;
private String ip = "localhost";// 設置成辦事器IP
private int port = 8821;
private String sendMessage = "Windwos";
public ClientTest() {
try {
if (createConnection()) {
sendMessage();
getMessage();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
private boolean createConnection() {
cs = new ClientSocket(ip, port);
try {
cs.CreateConnection();
System.out.print("銜接辦事器勝利!" + "\n");
return true;
} catch (Exception e) {
System.out.print("銜接辦事器掉敗!" + "\n");
return false;
}
}
private void sendMessage() {
if (cs == null)
return;
try {
cs.sendMessage(sendMessage);
} catch (Exception e) {
System.out.print("發送新聞掉敗!" + "\n");
}
}
private void getMessage() {
if (cs == null)
return;
DataInputStream inputStream = null;
try {
inputStream = cs.getMessageStream();
} catch (Exception e) {
System.out.print("吸收新聞緩存毛病\n");
return;
}
try {
//當地保留途徑，文件名會主動從辦事器端繼續而來。
String savePath = "E:\\";
int bufferSize = 8192;
byte[] buf = new byte[bufferSize];
int passedlen = 0;
long len=0;
savePath += inputStream.readUTF();
DataOutputStream fileOut = new DataOutputStream(new BufferedOutputStream(new BufferedOutputStream(new FileOutputStream(savePath))));
len = inputStream.readLong();
System.out.println("文件的長度為:" + len + "\n");
System.out.println("開端吸收文件!" + "\n");
while (true) {
int read = 0;
if (inputStream != null) {
read = inputStream.read(buf);
}
passedlen += read;
if (read == -1) {
break;
}
//上面進度條本為圖形界面的prograssBar做的，這裡假如是打文件，能夠會反復打印出一些雷同的百分比
System.out.println("文件吸收了" + (passedlen * 100/ len) + "%\n");
fileOut.write(buf, 0, read);
}
System.out.println("吸收完成，文件存為" + savePath + "\n");
fileOut.close();
} catch (Exception e) {
System.out.println("吸收新聞毛病" + "\n");
return;
}
}
public static void main(String arg[]) {
new ClientTest();
}
}
願望本文所述對年夜家Java法式設計有所贊助。
