如何在java中通过套接字发送图像数据类型

我真的很困惑如何通过套接字发送图像数据类型。 请帮帮我。 我已经了解了如何将Image数据类型转换为char []，但结果为0。

Answer 1

您可以使用此方法将源转换为BufferedImage （ 源代码 ）：

 public BufferedImage toBufferedImage(final Image image, final int type) { //Test if image does not need conversion if (image instanceof BufferedImage) return (BufferedImage) image; //Check if image can be converted easily if (image instanceof VolatileImage) return ((VolatileImage) image).getSnapshot(); //loadImage method ensures that the image has loaded fully (it could be from the web or something). If you are sure that when this method is called - the image is loaded, you can remove this line and whole method. loadImage(image); //Create new BufferedImage with the same width and height and given data type (see constants in BufferedImage API) final BufferedImage buffImg = new BufferedImage(image.getWidth(null), image.getHeight(null), type); //Get graphics out of our new BufferedImage. Graphics2D is used to draw something on the image final Graphics2D g2 = buffImg.createGraphics(); //Use Graphics2D to draw our Image contents on top of BufferedImage g2.drawImage(image, null, null); //We no longer need our graphics object as we drawn everything we wanted g2.dispose(); //Return BufferedImage return buffImg; } //Method that ensures that the image was loaded succesfully private void loadImage(final Image image) { //Inner class implementing the ImageObserver interface. It will be used to track the image loading progress class StatusObserver implements ImageObserver { boolean imageLoaded = false; //Each time an image updates - it will call this method public boolean imageUpdate(final Image img, final int infoflags, final int x, final int y, final int width, final int height) { //When flags contains ALLBITS flag - that means that the image was fully loaded. if (infoflags == ALLBITS) { synchronized (this) { //Therefore we set status to true imageLoaded = true; //And notify anyone who was waiting for our job to be done notify(); } return true; } return false; } } //Then we create the observer itself final StatusObserver imageStatus = new StatusObserver(); //We aquire it's monitor with this synchronized block. This will allow us to "wait" for it to complete loading (see notify() in StatusObserver) synchronized (imageStatus) { //Basically if image is loaded - it will have it's width and height set if (image.getWidth(imageStatus) == -1 || image.getHeight(imageStatus) == -1) { //While status observer is not loaded while (!imageStatus.imageLoaded) { try { //We wait for status observer to notify us imageStatus.wait(); } catch (InterruptedException ex) {} } } } } 

然后，您可以使用ImageIO.write（）方法编写生成的BufferedImage 。

Answer 2

使用ImageIO写入方法。

Answer 3

尝试以下方法：

 InputStream inp = new FileInputStream("image.png"); byte[] buffer=new byte[1024]; int readData; while((readData = inp.read(buffer))!=-1){ socketOutput.write(buffer,0,readData); }