利用Applet请求服务
程序员文章站
2022-07-03 13:08:59
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public class ConnectionHelper { private HttpURLConnection conn; ConnectionHelper(String urlStr) throws IOException { URL serverUrl = new URL(urlStr); // open Socket connection. conn = (HttpURLConnection) serverUrl.openConnection(); conn.setRequestMethod("POST"); conn.setAllowUserInteraction(true); conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(true); conn.setRequestProperty("Content-Type", "application/octet-stream"); } HttpURLConnection getConnection() { return conn; } }
使用,下面的代码可以将图片从applet上传到服务器:
ConnectionHelper connHelper = new ConnectionHelper(urlStr); // open Socket connection. HttpURLConnection conn = connHelper.getConnection(); if (null != image) { BufferedImage bufImg = new BufferedImage(image.getWidth(this), image.getHeight(this), BufferedImage.TYPE_3BYTE_BGR); Graphics2D g2d = bufImg.createGraphics(); g2d.drawImage(image, 0, 0, this); ImageIO.write(bufImg, "jpg", conn.getOutputStream()); } else { OutputStream outStream = conn.getOutputStream(); InputStream inStream = new FileInputStream(localImageFile); byte[] b = new byte[1024 * 1024]; int bytes = 0; while ((bytes = inStream.read(b)) > 0) { outStream.write(b, 0, bytes); } inStream.close(); }