我在做客户端服务器通信。我通过URLConnection
课程连接了两个。
现在我正在尝试向服务器发送登录信息,服务器将检查信息是否正确,否则它将要求我再次登录,对于这种情况,我们假设登录失败。但是当我再次尝试发送登录信息后得到服务器的响应后,我正在
java.net.ProtocolException: Cannot write output after reading input.
这是我的代码:
URL url = new URL(uniRL);
java.net.URLConnection connection = url.openConnection();
connection.setAllowUserInteraction(true);
connection.setDoOutput(true);
while(true){
System.out.println("Enter 1-login , 2-Exit");
useroption = input.nextLine();
numOption = Integer.parseInt(useroption);
if( numOption == 1){
OutputStreamWriter writer = new OutputStreamWriter(
connection.getOutputStream());
user_login = login();
writer.write(user_login[0]+"@");
writer.write(user_login[1]);
writer.flush();
//out.close();
BufferedReader in = new BufferedReader(
new InputStreamReader(
connection.getInputStream()));
while ((tempString = in.readLine()) != null) {
decodedString = tempString;
//System.out.println(decodedString);
//System.out.println(decodedString.equalsIgnoreCase("unknown user"));
}
in.close();
if((decodedString.equalsIgnoreCase("unknown user"))){continue;}
else{break;}
}
答案 0 :(得分:0)
当您致电in.close()
时,您实际上正在关闭网址连接所使用的流。您需要再次致电url.openConnection()
以重新打开流...