java把截图上传至服务器

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java 把上传截图到服务器

(1)从JTextArea或java swing的其他组件获取截图

 

 /***
	     * convert JTextArea to image
	     * @param ta
         * @param destFile : java.io.File or OutputStream
         * @param format
         * @param multiple : 分辨率倍数
         */
        public static BufferedImage generateImage(JComponent ta, Object destFile, String format, Integer specifiedHeight, Integer specifiedWidth, int multiple) {
            int height=ta.getHeight();
			int width=ta.getWidth();
	    	if(specifiedHeight!=null&&specifiedHeight!=SystemHWUtil.NEGATIVE_ONE){//如果指定了高度
	    		height=specifiedHeight;
	    	}
			if(specifiedWidth!=null&&specifiedWidth!=SystemHWUtil.NEGATIVE_ONE){//如果指定了高度
				width=specifiedWidth;
			}
            BufferedImage img = new BufferedImage(width * multiple, height * multiple, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2d = img.createGraphics();
            g2d.scale(multiple, multiple);
            /*g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
	        g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
	        g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
	        Ellipse2D.Double e = new Ellipse2D.Double(300D - DOT_SIZE,
                    200D - DOT_SIZE, DOT_SIZE + DOT_SIZE, DOT_SIZE + DOT_SIZE);
	        g2d.setColor(Color.YELLOW);
	        g2d.fill(e);*/
	        ta.printAll(g2d);
	        g2d.dispose();
	        if(!ValueWidget.isNullOrEmpty(destFile)){
                if (destFile instanceof File) {//把截图保存到文件
                    File file = (File) destFile;
                    try {
                        ImageIO.write(img, format/*"jpg"*/, file);
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                } else if (destFile instanceof OutputStream) {
                    OutputStream outputStream = (OutputStream) destFile;
                    try {
                        ImageIO.write(img, format/*"jpg"*/, outputStream);
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                }
            }

	        return img;
		}

 

(2)把截图转化为字节数组

实际上是把BufferedImage转化为byte[]

    /**
     * 把BufferedImage 转化为字节数组
     *
     * @param img
     * @return
     */
    public static ByteArrayOutputStream imageToByteArrayOutputStream(BufferedImage img, String formatName) {
        //创建储存图片二进制流的输出流
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        try {
            //创建ImageOutputStream流
            ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(baos);
            //将二进制数据写进ByteArrayOutputStream
            ImageIO.write(img, formatName, imageOutputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return baos;
    }

  

(3)使用HttpURLConnection发送http请求

    public static void uploadFile(String formatName, byte[] bytes, String uploadedFileName) {
        String size = FileUtils.formatSize(bytes.length);
        int resultOption = JOptionPane.showConfirmDialog(null, "Are you sure to Upload " + size + " to Server ?", "确认",
                JOptionPane.OK_CANCEL_OPTION);
        if (resultOption != JOptionPane.OK_OPTION) {
            ToastMessage.toast("取消上传", 2000, Color.red);
            return;
        }
        try {
            String result = HttpSocketUtil.uploadFile("http://blog.yhskyc.com/convention2/ajax_image/upload", bytes,
                    uploadedFileName + "." + formatName, (Map) null);
            Map requestMap = null;
            try {
                requestMap = (Map) HWJacksonUtils.deSerialize(result, Map.class);
                StringBuffer stringBuffer = new StringBuffer("");
                for (Object obj : requestMap.keySet()) {
                    Object val = requestMap.get(obj);
                    stringBuffer.append("
");
                    stringBuffer.append("").append(obj).append("").append(":").append("
");
                    stringBuffer.append(val).append("
");
                }
                stringBuffer.append("");
//                System.out.println(stringBuffer);
                ToastMessage.toast("上传成功", 2000);
                CustomDefaultDialog customDefaultDialog = new CustomDefaultDialog(stringBuffer.toString(), "图片路径", true, null, 800);
                customDefaultDialog.setVisible(true);
//                            ComponentUtil.appendResult(area2,result,true,false);

            } catch (JsonParseException e1) {
                e1.printStackTrace();
            } catch (JsonMappingException e1) {
                e1.printStackTrace();
            }

            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

 /***
     * 上传BufferedImage 到远程服务器
     * @param img
     */
    public static void uploadBufferedImage(BufferedImage img) {
        String formatName = "jpg";
        ByteArrayOutputStream baos = imageToByteArrayOutputStream(img, formatName);

        //输出数组
        byte[] bytes = baos.toByteArray();
        uploadFile(formatName, bytes, "Screenshots");
    }

 

 

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