学步园

客户端：

try {<br /> //建立连接<br /> URL url = new URL("Servlet地址");<br /> URLConnection con = url.openConnection();</p> <p> con.setUseCaches(false);<br /> con.setDoOutput(true);<br /> con.setDoInput(true);<br /> con.setRequestProperty("Content-Type", "application/octet-stream");</p> <p> //发送数据<br /> HashMap map=new HashMap();<br /> map.put("test",test);<br /> ObjectOutputStream objOutStream = new ObjectOutputStream(con.getOutputStream());<br /> objOutStream.writeObject(updatePPPHashMap);<br /> objOutStream.flush();<br /> objOutStream.close();</p> <p> //读取数据<br /> ObjectInputStream objInStream = new ObjectInputStream(con.getInputStream());<br /> String message = (String) objInStream.readObject();<br /> if (message.equals("SUCCESS")) {<br /> JOptionPane.showMessageDialog(this, "提交成功！");<br /> } else {<br /> JOptionPane.showMessageDialog(this, "提交失败！");<br /> }<br /> objInStream.close();<br /> } catch (MalformedURLException e) {<br /> e.printStackTrace();<br /> } catch (IOException e) {<br /> e.printStackTrace();<br /> } catch (ClassNotFoundException e) {<br /> e.printStackTrace();<br /> }

注意：

      如果客户端只有输出流，没有输入流，将无法触发连接，原因不详

服务端：

try {<br /> //读取数据<br /> ObjectInputStream oos = new ObjectInputStream(super.getRequest().getInputStream());<br /> HashMap map = (HashMapoos.readObject();<br /> oos.close();<br /> //发送数据<br /> ObjectOutputStream out = new ObjectOutputStream(super.getResponse().getOutputStream());<br /> out.writeObject("SUCCESS");<br /> out.flush();<br /> out.close();<br /> } catch (IOException e) {<br /> e.printStackTrace();<br /> } catch (ClassNotFoundException e) {<br /> e.printStackTrace();<br /> }