applet中权限的问题，困扰了我一周的问题

Question

http://172.28.26.189:8080/examples/servlet/MyServlet
是否可以连接？

Answer 1

//建立连接也需要配置一些参数，
//还有，去别人的机器上试试。。
//这里暂时不用考虑 java.policy .
try
            {
               UserVO userVO = new UserVO(userTableModel);
               URL url = new URL(getServletUrl());
               URLConnection urlConn = url.openConnection();
               
               //urlConn.setDoInput(true);
               urlConn.setDoOutput(true);
               urlConn.connect();   
               //客户端发送请求               
              
                             
               
               ObjectOutputStream objOutput = new ObjectOutputStream(urlConn.getOutputStream());         
               objOutput.writeUTF("add");
               objOutput.writeObject(userVO);   
               objOutput.flush();
               objOutput.close();       
              
               
               //服务器回应               
               
               ObjectInputStream objInput = new   ObjectInputStream(urlConn.getInputStream());
               result = objInput.readInt();               
               objInput.close();
               
               urlConn = null;
              
            }
            catch(IOException ioe)
            {
                JOptionPane.showMessageDialog(this,"IO发生错误：" + ioe.getMessage());
            }
            catch(Exception e)
            {
                JOptionPane.showMessageDialog(this,"创建连接异常：" + e.getMessage());
            }

Answer 2

to upc_chenli(chenli) :
我現在就是连接时都不过，（urlconn.connect();）告诉我connect refused，别说响应了阿

Answer 3

urlconn.connect();连接前要设置一些参数