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我正在將圖像從服務器傳輸到客戶端。服務器捕獲屏幕並將其轉換爲字節數組和客戶端接收字節數組並將其轉換爲圖像。但傳輸僅在少數幀發生,然後發生錯誤。在java客戶端獲取負字節數組長度或大量字節數組長度
接收側:
while(true) {
DataInputStream dis = new DataInputStream(csocket.getInputStream());
int len = dis.readInt();
System.out.println(len);
byte data[] = null;
data = new byte[len];
dis.read(data);
ByteArrayInputStream in = new ByteArrayInputStream(data);
BufferedImage image1=ImageIO.read(in);
ImageIcon imageIcon= new ImageIcon(image1);
Image image = imageIcon.getImage();
image = image.getScaledInstance(cPanel.getWidth(),cPanel.getHeight(),Image.SCALE_FAST);
//Draw the recieved screenshot
Graphics graphics = cPanel.getGraphics();
graphics.drawImage(image, 0, 0, cPanel.getWidth(),cPanel.getHeight(),cPanel);
}
發送方:
while(continueLoop) {
try {
BufferedImage image = robot.createScreenCapture(rectangle);
byte[] imageInByte;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(image,"jpg", baos);
baos.flush();
imageInByte = baos.toByteArray();
baos.close();
DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
//PrintWriter out = new PrintWriter(socket.getOutputStream());
//out.flush();
dos.writeInt(imageInByte.length);
System.out.println(imageInByte.length);
dos.write(imageInByte);
Thread.sleep(1000);
dos.flush();
}
catch(Exception e) {
}
}
接收機的輸出:
1177222283
-297418067
1228900861
-412483840
189486847
10536391
-33405441
12898815
740182
-16736067
-805436987
-16726825
258150991
2137853087
1917408603
512024791
-1227886373
-1034512766
1772271848
157387
Exception in thread "Thread-3" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:228)
at remoteclient.ClientScreenReciever.run(ClientScreenReciever.java:65)
請幫me..what從服務器圖像的連續傳輸做以更快的方式在java中通過套接字到客戶端。
是它的工作。謝謝。 – user3283519