ServerSocket java-server只读输入一次？ [英] ServerSocket java-server reads input only once?

问题描述

我写了一个java服务器，这里是代码：

I have written a java server and here is the code:

try 
{ 
    ss = new ServerSocket(8080); 
    while (true) 
    { 
        socket = ss.accept(); 
        System.out.println("Acess given");

        in = new BufferedReader(new InputStreamReader(socket.getInputStream())); 

        //out = new PrintWriter(socket.getOutputStream(),true); 

        line = in.readLine(); 
        System.out.println("you input is :" + in.readLine()); 
    } 
} 

iphone应用程序是客户端，代码：

And an iphone application is the client and there is the code for it:

- (void)viewDidLoad {
    [super viewDidLoad];

    socket = [[LXSocket alloc]init];

    if ([socket connect:@"10.211.55.2" port:8080]) {
        NSLog(@"socket has been created");
    }
    else {
        NSLog(@"socket couldn't be created created");
    }

    @try {


    }@catch (NSException * e) {
        NSLog(@"Unable to send data");
    }

    [super viewDidLoad];
}

-(IBAction)sendData{
    [socket sendString:@"A\n"];
}

我在这里有2个问题：首先是服务器只读输入一次。第二个是，当我尝试输出数据时，它不会输出，直到我调用该方法两次（点击uibutton两次）。不知道这里发生了什么。

I am having 2 problems here: first is that the server is only reading the input once. The second is that when ever I try to output the data it doesn't output until I have called the method twice (clicked on the uibutton twice). Not sure what is happening here. What am I doing wrong?

推荐答案

每次在while循环中创建一个新的阅读器。而是将代码移到while循环之外，并在readLine（）调用上阻塞。

You are creating a new reader everytime in your while loop. Instead move the code outside the while loop and block on the readLine() call.

socket = ss.accept();
in = new BufferedReader(new InputStreamReader(socket.getInputStream());
String line = "";
while ( true) { 
    line = in.readLine();
    System.out.println("you input is :" + line); 
    if ( "Bye".equals(line) ) 
        break;
} 

以下是 example 服务器端程序。

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