Question

我正在用javafx编写一个java数据传输程序。一切运行正常，但是当我点击我的程序中场景2中的＆＃34;发送＆＃34;按钮（以及场景3中的接收按钮）时，它会崩溃我的程序而不会出现任何错误。这是我的Scene 2的控制器类。问题可能在于函数＆＃34; send（）＆＃34;。这是用于创建端口和传输文件的代码。

public class ControllerSc2 {

@FXML
public Button browsebut,sendbut,backbut;

@FXML
public TextField Path;


@FXML
public TextArea info;

public Socket socket;
public String path,name;
public void browseButton() {

    FileChooser fc = new FileChooser();
    File sf = fc.showOpenDialog(null);

    if(sf != null){
        Path.setText(path = sf.getAbsolutePath());
        info.setText("Name: "+ (name = sf.getName()) +"\n" + "Size: "+ sf.length() +"Bytes \n" +"From Path: "+ sf.getAbsolutePath() +"\n");
    }
    else{
        Path.setPromptText("please choose something!");
        info.setPromptText("No File was chosen!");

    }


}
public void back(){
    Main.ShowScene1();
}
    //NOTE!!!!!!: critical problem in send function
public void send() throws IOException{
    ServerSocket serverSocket = new ServerSocket(5000);//this is the code making the program listen to connection from a port
    info.setText("Waiting for connection");
    socket = serverSocket.accept();//waiting connection
    info.setText("Connected....");

    /*DataOutputStream dout=new DataOutputStream(socket.getOutputStream());//
    dout.writeUTF(name);//transfer name */

    //File transferFile = new File(path);
    File transferFile = new File("C:\\Users\\longt\\IdeaProjects\\a.docx");

    byte[] bytearray = new byte[(int) transferFile.length()];
    FileInputStream fin = new FileInputStream(transferFile);
    BufferedInputStream bin = new BufferedInputStream(fin);
    bin.read(bytearray, 0, bytearray.length);
    OutputStream os = socket.getOutputStream();
    System.out.println("Sending Files...");
    os.write(bytearray, 0, bytearray.length);
    os.flush();
    socket.close();
    System.out.println("File transfer complete");
}

} `

撞击按钮的动作

0 个答案: