用Socket实现PC和手机的文件传输

PC服务器端代码:

/* * PC与Android客户端实现文件的传送 * PC服务器端 */ package com.android.test; import java.io.BufferedInputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; public class TransferFileServer { private static final int HOST_PORT = 8821; private void start() { Socket s = null; try { ServerSocket ss = new ServerSocket(HOST_PORT); while (true) { String filePath = "/home/fan/Pictures/1.jpg"; File file = new File(filePath); System.out.println("文件长度:" + (int) file.length()); s = ss.accept(); log("建立Socket连接"); DataInputStream dis = new DataInputStream( new BufferedInputStream(s.getInputStream())); dis.readByte(); DataInputStream fis = new DataInputStream( new BufferedInputStream(new FileInputStream(filePath))); DataOutputStream dos = new DataOutputStream(s.getOutputStream()); dos.writeUTF(file.getName()); dos.flush(); dos.writeLong((long) file.length()); dos.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; } dos.write(buf,0,read); } dos.flush(); // 注意关闭socket链接哦，不然客户端会等待server的数据过来， // 直到socket超时，导致数据不完整。 fis.close(); s.close(); log("文件传输完成"); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } void log(String msg) { System.out.println(msg); } public static void main(String args[]) { new TransferFileServer().start(); } }

ClientSocket:辅助类

/* * PC与Android文件传输 * Android客户端 */ package com.android.test; import java.io.BufferedInputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.Socket; import java.net.UnknownHostException; 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; } public void createConnection() { try { socket = new Socket(ip, port); } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); if (socket != null) { try { socket.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); if (socket != null) { try { socket.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } finally { } } public void sendMessage(String sendMessage) { 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 (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); if (out != null) { try { out.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } } public DataInputStream getMessageStream() { try { getMessageStream = new DataInputStream(new BufferedInputStream( socket.getInputStream())); // return getMessageStream; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); if (getMessageStream != null) { try { getMessageStream.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } return getMessageStream; } public void shutDownConnection() { try { if (out != null) { out.close(); } if (getMessageStream != null) { getMessageStream.close(); } if (socket != null) { socket.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

Android客户端：Acitivyt实现：

package com.android.test; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class Main extends Activity implements OnClickListener{ private ClientSocket cs = null; private static final String FILE_PATH = "/mnt/sdcard/"; private String ip = "192.168.1.103"; private int port = 8821; private String sendMessage = "Linux"; private Button mButton; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mButton = (Button)findViewById(R.id.start); mButton.setOnClickListener(this); } private void start() { if (createConnection()) { sendMessage(); getMessage(); } } private void getMessage() { if (cs == null) return; DataInputStream inputStream = null; inputStream = cs.getMessageStream(); try { String savePath = FILE_PATH; int bufferSize = 8192; byte[] buf = new byte[bufferSize]; int passedlen = 0; long len = 0; savePath += inputStream.readUTF(); Log.d("AndroidClient","@@@savePath"+savePath); DataOutputStream fileOut = new DataOutputStream( new BufferedOutputStream(new BufferedOutputStream( new FileOutputStream(savePath)))); len = inputStream.readLong(); Log.d("AndoridClient","文件的长度为:"+len); Log.d("AndroidClient","开始接收文件"); while(true) { int read = 0; if (inputStream != null) { read = inputStream.read(buf); } passedlen += read; if (read == -1) { break; } Log.d("AndroidClient","文件接收了"+(passedlen*100/len)+"%/n"); fileOut.write(buf,0,read); } Log.d("AndroidClient","@@@文件接收完成"+savePath); fileOut.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void sendMessage() { if (cs == null) return; cs.sendMessage(sendMessage); } private boolean createConnection() { cs = new ClientSocket(ip, port); cs.createConnection(); Log.d("Main", "连接服务器成功:"); return true; } public void onClick(View v) { start(); } }

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