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java socket传输图片

 
阅读更多
转自http://chwshuang.iteye.com/blog/1073715


服务器端: 
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) {
                // 选择进行传输的文件
                String filePath = "D:\\update\\image\\5.jpg";
                File fi = new File(filePath);

                System.out.println("文件长度:" + (int) fi.length());

                // public Socket accept() throws
                // IOException侦听并接受到此套接字的连接。此方法在进行连接之前一直阻塞。

                s = ss.accept();
                System.out.println("建立socket链接");
                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());
                //将文件名及长度传给客户端。这里要真正适用所有平台，例如中文名的处理，还需要加工，具体可以参见Think In Java 4th里有现成的代码。
                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();
                // 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();                
                System.out.println("文件传输完成");
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String arg[]) {
        new ServerTest().start();
    }
}



具体实现： 
package serverphoto;


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;
    }

    /** *//**
     * 创建socket连接
     * 
     * @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) {

        }
    }
}



客户端： 
package serverphoto;



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";// 设置成服务器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("连接服务器成功!" + "\n");
            return true;
        } catch (Exception e) {
            System.out.print("连接服务器失败!" + "\n");
            return false;
        }

    }

    private void sendMessage() {
        if (cs == null)
            return;
        try {
            cs.sendMessage(sendMessage);
        } catch (Exception e) {
            System.out.print("发送消息失败!" + "\n");
        }
    }

    private void getMessage() {
        if (cs == null)
            return;
        DataInputStream inputStream = null;
        try {
            inputStream = cs.getMessageStream();
        } catch (Exception e) {
            System.out.print("接收消息缓存错误\n");
            return;
        }

        try {
            //本地保存路径，文件名会自动从服务器端继承而来。
            String savePath = "D:\\update\\";
            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("文件的长度为:" + len + "\n");
            System.out.println("开始接收文件!" + "\n");
                    
            while (true) {
                int read = 0;
                if (inputStream != null) {
                    read = inputStream.read(buf);
                }
                passedlen += read;
                if (read == -1) {
                    break;
                }
                //下面进度条本为图形界面的prograssBar做的，这里如果是打文件，可能会重复打印出一些相同的百分比
                System.out.println("文件接收了" +  (passedlen * 100/ len) + "%\n");
                fileOut.write(buf, 0, read);
            }
            System.out.println("接收完成，文件存为" + savePath + "\n");

            fileOut.close();
        } catch (Exception e) {
            System.out.println("接收消息错误" + "\n");
            return;
        }
    }

    public static void main(String arg[]) {
        new ClientTest();
    }
}











--------------------------------------------------------------------------------------------------------------------------------------------------------------------
http://topic.csdn.net/t/20060924/11/5044008.html





功能实现：两个Socket建立连接后，
server   发送，client   接收。
然后server向client发送图片，第一张可以正常接受，第二张就不行了。 




代码： 
//ser.java 
import   com.sun.image.codec.jpeg.*; 
import   java.io.*; 
import   javax.imageio.*; 
import   java.awt.image.*; 
import   java.net.*; 
import   java.awt.*; 

public   class   Ser   extends   Thread   { 

public   Ser()   { 
} 

public   void   run   ()   { 

try   { 

output   =   new   ByteArrayOutputStream(); 
ss   =   new   ServerSocket(2222); 
s   =   ss.accept(); 
os   =   s.getOutputStream(); 

bi   =   ImageIO.read(new   File( "k08.jpg ")); 
param   =   JPEGCodec.getDefaultJPEGEncodeParam(bi); 
encoder   =   JPEGCodec.createJPEGEncoder(output,   param); 
encoder.encode(bi); 
output.writeTo(os); 
os.flush(); 
output.flush(); 


Thread.sleep(1000); 
bi   =   ImageIO.read(new   File( "k09.jpg ")); 
param   =   JPEGCodec.getDefaultJPEGEncodeParam(bi); 
encoder   =   JPEGCodec.createJPEGEncoder(output,   param); 
encoder.encode(bi); 
output.writeTo(os); 
os.flush(); 
output.flush(); 

System.out.println( "Server   thread   start. "); 
        } 
        catch   (Exception   ex)   { 
        ex.printStackTrace(); 
        } 

try   { 

os.close(); 
encoder.getOutputStream().close(); 
        } 
        catch   (Exception   ex)   { 
        ex.printStackTrace(); 
        } 

} 

public   static   void   main(String[]   args)   throws   Exception   { 

new   Ser().start(); 
} 

private   BufferedImage   bi   =   null; 
private   ServerSocket   ss   =   null; 
private   Socket   s   =   null; 
private   OutputStream   os   =   null; 
private   ByteArrayOutputStream   output   =   null; 
private   JPEGEncodeParam   param   =   null; 
private   JPEGImageEncoder   encoder   =   null; 
} 


//Cli.java 
import   com.sun.image.codec.jpeg.*; 
import   java.io.*; 
import   javax.imageio.*; 
import   java.awt.image.*; 
import   java.net.*; 
import   java.awt.*; 
import   javax.swing.*; 

class   MyFrame   extends   JFrame   { 
private   MyPanel   panel   =   null;	
public   MyFrame()   { 
panel   =   new   MyPanel(); 
add(panel); 
} 

public   void   drawScr(BufferedImage   bi)   { 
panel.draw(bi); 
} 

private     class   MyPanel   extends   JPanel   { 

protected   void   paintComponent(Graphics   g)   { 
super.paintComponent(g); 
g.drawImage(bi,   0,   0,   null); 
} 

public   void   draw(BufferedImage   bi)   { 
this.bi   =   bi; 
this.updateUI(); 
} 

private   BufferedImage   bi   =   null;	
} 
} 

public   class   Cli   extends   Thread   { 

public   Cli()   { 
try   { 
//ip   =   InetAddress.getByName( "10.100.101.36 "); 
ip   =   InetAddress.getLocalHost(); 
s   =   new   Socket(ip,   2222); 
is   =   s.getInputStream(); 
        } 
        catch   (Exception   ex)   { 
        ex.printStackTrace(); 
        System.err.println( "public   Client. "); 
        }	
} 

public   void   run()   { 
frame   =   new   MyFrame(); 
frame.setSize(500,   300); 
frame.setVisible(true); 
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

try   { 


JPEGImageDecoder   decoder   =   JPEGCodec.createJPEGDecoder(is); 
BufferedImage   bi   =   decoder.decodeAsBufferedImage(); 
if   (bi   !=   null)   { 

frame.drawScr(bi); 
System.out.println( "drawScr. "); 
} 


Thread.sleep(3000); 
decoder   =   JPEGCodec.createJPEGDecoder(is); 
bi   =   decoder.decodeAsBufferedImage(); 
if   (bi   !=   null)   { 

frame.drawScr(bi); 
System.out.println( "drawScr. "); 
} 
        } 
        catch   (Exception   ex)   { 
        ex.printStackTrace(); 
        } 

} 

public   static   void   main(String[]   args)   throws   Exception   { 
new   Cli().start(); 
} 

private   InetAddress   ip   =   null; 
private   Socket   s   =   null; 
private   InputStream   is   =   null; 
private   MyFrame   frame   =   null;	
}














-------------------------------------------------------------------------------------------------------------------------------------------------------------------

http://xiaoliefengfeng.iteye.com/blog/989799

android客服端上传图片到服务器，使用的xml来传输base64编码后的图片
我使用的是android自带的httpclient来发送post请求的，我也想过自己使用post方式来发送数据，但是，数据在服务器端进行base64解码的时候保存，我也没找出原因，所以就没写出来了
发送post请求就是因为post允许一次传输的数据量大，因为图片经过base64编码后，数据量大，如果采用get或者其他的方式来传输数据，传输效率不过，而且数据量大小受到限制


1.获取android客服端图片 
  //对文件的操作
  FileInputStream in = new FileInputStream(Environment.getExternalStorageDirectory() + "/images/musicmax.png");
  byte buffer[] = StreamUtil.read(in);//把图片文件流转成byte数组
  byte[] encod = Base64.encode(buffer,Base64.DEFAULT);//使用base64编码



2.发送post请求，注意android客服端访问网络记得要加访问网络的权限 
 String path ="http://192.168.1.173:7999/videonews/TestServlet"; 
 Map<String, String> params = new HashMap<String, String>();//定义一个保存key-value的Map用于保存需要传输的数据
 
 params.put("value", new String(encod));//保存数据到map对象
 Log.i(TAG,new String(encod));
 if(StreamUtil.sendHttpClientPOSTRequest(path, params, "utf-8")){//使用帮助类来发送HttpClient来发送post请求
  Log.i(TAG, "success :" + path + "----:decode:----" + new String(Base64.decode(encod, Base64.DEFAULT)));
 }



服务器端的代码 
String value = request.getParameter("value");//获取value的值
 FileOutputStream fileout = new FileOutputStream("c:/music.png");//设置文件保存在服务器的什么位置
 fileout.write(com.sun.org.apache.xml.internal.security.utils.Base64.decode(value.getBytes()));//使用base64解码
 fileout.close();



StreamUtil帮助类里面完整代码 
public class StreamUtil {
 /**
  * 返回字节数组
  * 
  * @param in输入的流
  * @return
  * @throws Exception
  */

 public static byte[] read(InputStream in) throws Exception {
  ByteArrayOutputStream out = new ByteArrayOutputStream();
  if (in != null) {
   byte[] buffer = new byte[1024];
   int length = 0;
   while ((length = in.read(buffer)) != -1) {
    out.write(buffer, 0, length);
   }
   out.close();
   in.close();
   return out.toByteArray();
  }
  return null;
 }
 
 /**
  * 采用HttpClient发送POST请求
  * @param path 请求路径
  * @param params 请求参数
  * @throws Exception
  */
 public static boolean sendHttpClientPOSTRequest(String path, Map<String, String> params, String encoding) throws Exception{
  List<NameValuePair> param = new ArrayList<NameValuePair>();
  if(params!=null && !params.isEmpty()){
   for(Map.Entry<String, String> entry : params.entrySet()){
    param.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
   }
  }
  UrlEncodedFormEntity entity = new UrlEncodedFormEntity(param, encoding);
  HttpPost post = new HttpPost(path);
//  HttpGet get = new HttpGet();
  post.setEntity(entity);
  DefaultHttpClient client = new DefaultHttpClient();
  HttpResponse response = client.execute(post);
  if(response.getStatusLine().getStatusCode() == 200){
//   response.getEntity().getContent();//获取服务器返回的数据
   return true;
  }
  return false;
 }
}






关于自己写post请求的代码，这个代码我测试过，在服务器对传输过来的数据进行base64解码的时候总报错，具体的原因我也没找出来，下面我贴出来代码，希望朋友们帮我找找原因 
/*//对文件的操作  注:此方法测试有问题
					FileInputStream in = new FileInputStream(Environment.getExternalStorageDirectory() + "/images/musicmax.png");
					byte buffer[] = StreamUtil.read(in);
					byte[] encod = Base64.encode(buffer,Base64.DEFAULT);
					
					StringBuffer sb = new StringBuffer("value=");
					URL url = new URL(path);
					HttpURLConnection conn = (HttpURLConnection) url.openConnection();
					
					conn.setConnectTimeout(5 * 1000);
					conn.setRequestMethod("POST");
					conn.setDoOutput(true);//允许对外输出数据
					conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
					conn.setRequestProperty("Content-Length", (sb.toString().getBytes().length + encod.length) + "");
					OutputStream outs = conn.getOutputStream();
										outs.write(sb.toString().getBytes());
					outs.write(encod);
					outs.close();
					Log.i(TAG,new String(encod));
					if(conn.getResponseCode() == 200){
												Log.i(TAG, "success :" + path + "----:decode:----" + new String(Base64.decode(encod, Base64.DEFAULT)));
//下面的代码是测试是否解码后能生成对应的图片没
//						FileOutputStream fileout = new FileOutputStream(Environment.getExternalStorageDirectory() + "/images/musicmax1.png");
//						fileout.write(Base64.decode(encod, Base64.DEFAULT));
//						fileout.close();
					}



























====================================================================================================================================================================
通信:client发送请求到server,server返回结果。

client: 

package client;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class client {
	private static Socket socket;
	private static String ServerIP = "localhost";
	private static int ServerPort = 51707;
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			socket = new Socket(ServerIP,ServerPort);
			//发送
			ObjectOutputStream oos = new ObjectOutputStream(socket
					.getOutputStream());
			String s = "{\"head\":\"this is head\",\"body\":\"hello,你好吗?\"}";
			oos.writeObject(s);
			oos.flush();
			//接收
			ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
			String sers = "null";
			try {
				sers = (String)ois.readObject();
			} catch (ClassNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			System.out.println("serversay:"+sers);
//			socket.close();
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}



server: 

package server;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server implements Runnable {
	public static final String SERVERIP = "localhost";
	public static final int SERVERPORT = 51707;
    private ServerSocket serverSocket;
    private BufferedReader reader;
    private Socket socket;
	@Override
	public void run() {
		// TODO Auto-generated method stub
		System.out.println("running...");
		try {
			serverSocket = new ServerSocket(SERVERPORT);
			while(true){
				Socket socket = serverSocket.accept();
				
				ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
				String s = "null";
				try {
					s = (String)ois.readObject();
				} catch (ClassNotFoundException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				System.out.println(System.currentTimeMillis()+s);
				ObjectOutputStream oos = new ObjectOutputStream(socket
						.getOutputStream());
				String ss = "{\"head\":\"this is head\",\"body\":\"hello,还可以\"}";
				oos.writeObject(ss);
				oos.flush();
				socket.close();
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("main...");
		Server s = new Server();
		s.run();
	}

}
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