Applet與Servlet通信

客戶端：

try { //建立連接 URL url = new URL("Servlet地址"); URLConnection con = url.openConnection(); con.setUseCaches(false); con.setDoOutput(true); con.setDoInput(true); con.setRequestProperty("Content-Type", "application/octet-stream"); //發送數據 HashMap map=new HashMap(); map.put("test",test); ObjectOutputStream objOutStream = new ObjectOutputStream(con.getOutputStream()); objOutStream.writeObject(updatePPPHashMap); objOutStream.flush(); objOutStream.close(); //讀取數據 ObjectInputStream objInStream = new ObjectInputStream(con.getInputStream()); String message = (String) objInStream.readObject(); if (message.equals("SUCCESS")) { JOptionPane.showMessageDialog(this, "提交成功！"); } else { JOptionPane.showMessageDialog(this, "提交失敗！"); } objInStream.close(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); }

注意：

      如果客戶端只有輸出流，沒有輸入流，將無法觸發連接，原因不詳

 

服務端：

try { //讀取數據 ObjectInputStream oos = new ObjectInputStream(super.getRequest().getInputStream()); HashMap map = (HashMapoos.readObject(); oos.close(); //發送數據 ObjectOutputStream out = new ObjectOutputStream(super.getResponse().getOutputStream()); out.writeObject("SUCCESS"); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); }