Question

现在我正在制作聊天节目。

但是有一些问题。

首先，在登录过程中，当我将id / pw发送到服务器时，服务器发送的是对还是错（协议3000或3001）。然后，客户端将获得协议。和

islogin(boolean)会改变真或假。但是，布尔值不会改变。我不知道为什么不改变。有一些代码。

clientbackground.java

    package client;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.StringTokenizer;

import crypto.des;



public class ClientBackground implements Runnable{

    Socket socket;
    DataInputStream in;
    private DataOutputStream out;
    private ClientGui gui;
    private String msg;
    String id;
    private String pass;
    private boolean islogin;
    private login_Frame lf;
    private regform rf;
    private String info;
    Thread clientThread;
    des crypto;
    String packet="";
    String tmp;
    boolean test = false;
    int protocol;


    public final void setGui(ClientGui gui) {
        this.gui = gui;
    }
    public void run() {
        try {
            socket = new Socket("192.168.0.11", 7770);
            System.out.println("connect!.");
            socket.setTcpNoDelay(true);
            crypto = new des();
            //crypto.SetD();
            out = new DataOutputStream(socket.getOutputStream());
            in = new DataInputStream(socket.getInputStream());  
            System.out.println(in.available()); //test
            System.out.println("okay!");
            while (in != null) {
                packet = in.readUTF();
                StringTokenizer st = new StringTokenizer(packet,"/");
                tmp = st.nextToken();
                msg = st.nextToken();
                this.protocol = Integer.parseInt(tmp);
                System.out.println(this.protocol+"&&&&"); //test
                switch(this.protocol){

                case 3000 :{
                System.out.println("success");
                test = true;
                this.lf.gettest(test);

                }
                break;
                case 3001 :{
                    System.out.println("wrong");
                    test = false;
                    this.lf.gettest(test);
                }
                break;
                default :{
                gui.jta.append(msg);
                System.out.println(msg);
                System.out.println(test+"%%");
                }
                break;
            }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } 
    }
    /*public void loginP() {
        System.out.println(this.protocol+"&&&&");
        switch(this.protocol){

        case 3000 :{
        System.out.println("success");
        test = true;
        this.lf.gettest(test);

        }
        break;
        case 3001 :{
            System.out.println("wrong!");
            test = false;
            this.lf.gettest(test);
        }
        break;
        }
    }*/

    public static void main(String[] args){
        ClientBackground clientBackground = new ClientBackground();
        Thread clientThread = new Thread(clientBackground);
        clientThread.setPriority(1);
        clientThread.start();
        clientBackground.lf = new login_Frame();
        clientBackground.lf.Clientback(clientBackground);

    }
    public void showFrameTest() {
        this.lf.setVisible(false); 
        this.gui = new ClientGui();
        this.gui.Clientback(this);  
    }
    public void showregfrom() {
        this.lf.setVisible(false); 
        this.rf = new regform();
        this.rf.Clientbackreg(this);
    }
    public void relogin_form() {
        this.rf.dispose(); 
        this.lf.setVisible(true);
    }

    public void sendMessage(String msg2) {
        try {
            out.writeUTF(msg2);
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public boolean lcheck() {
        return islogin;
    }

    public void setid(String id, String pass) {
        this.id = id;
        this.pass = pass;
    }
    public String getid() {
        return id;
    }

}

login_Frame.java

package client;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;

import javax.crypto.NoSuchPaddingException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

import crypto.des;



public class login_Frame extends JFrame{

    private static final long serialVersionUID = 1L;
    private String id;
    private String pass;
    JButton logb = new JButton("login");
    JButton exitb = new JButton("cancel");
    JButton regb = new JButton("reg");
    JLabel idlb = new JLabel("ID : ");
    JLabel pwlb = new JLabel("PW : ");
    JTextField idtb = new JTextField();
    JTextField pwtb = new JTextField();
    private static ClientBackground client;
    private DataInputStream in;
    byte[] CpStr = null;
    boolean test = false;
    String packet,tmp;

    public login_Frame(){
        new Thread(client).start();
        getContentPane().add(logb);
        getContentPane().add(exitb);
        getContentPane().add(regb);
        getContentPane().add(idlb);
        getContentPane().add(pwlb);
        getContentPane().add(idtb);
        getContentPane().add(pwtb);

        setLayout(null);
        setBounds(100, 100, 400, 200);
        setVisible(true);
        logb.setBounds(40, 110, 90, 40);
        exitb.setBounds(150, 110, 90, 40);
        regb.setBounds(260, 110, 90, 40);
        idlb.setBounds(20, 10, 50, 40);
        pwlb.setBounds(20, 60, 50, 40);
        idtb.setBounds(70, 10, 280, 40);
        pwtb.setBounds(70, 60, 280, 40);

        ActionListener confirmListener = new ConfirmListener();
        ActionListener exListener = new ExitListener();
        ActionListener regListener = new RegListener();
        logb.addActionListener(confirmListener);
        exitb.addActionListener(exListener);
        regb.addActionListener(regListener);
        idtb.addActionListener(confirmListener);
        pwtb.addActionListener(confirmListener);


    }
    public String getidtb(){
        return idtb.getText();
    }
    public String getpwtb(){
        return pwtb.getText();
    }
    private class ConfirmListener implements ActionListener {
        public void actionPerformed(ActionEvent e){

                try {
                    isLoginCheck();
                    System.out.println(test); //test
                    if(client.test){
                        System.out.println(client.test+"%%%%"); //test
                        client.showFrameTest();
                    }                   
                    else{
                        JOptionPane.showMessageDialog(null, "wrong!");
                    }


                } catch (Exception e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }

        }
    }
    private class RegListener implements ActionListener {
        public void actionPerformed(ActionEvent e){
                regbtaction();
        }
    }
    private class ExitListener implements ActionListener {
        public void actionPerformed(ActionEvent e){
            System.exit(0);
        }
    }
    public void Clientback(ClientBackground client) {
        this.client = client;
    }
    public void isLoginCheck() throws Exception{
        id = getidtb();
        pass = getpwtb();
        new Thread(client).start();
        //CpStr = client.crypto.Encrypts(pass);
        idtb.setText("");
        pwtb.setText("");
        client.setid(id, pass);
        client.sendMessage("3004"+"/"+id+"/"+pass);

    }
    public void regbtaction() {
        client.showregfrom();
        this.setVisible(false);
    }
    public void gettest(boolean test) {
        this.test = test;
    }

}

我编辑了一些代码并添加了一些测试代码来验证登录处理。现在，如果我执行我的程序并单击登录按钮，则会显示错误消息。但是一些测试代码教给我一些东西。连接！

0
okay!
connect!.
0
okay!
false
3000&&&&
success

这是clientBackground的推荐。特别是，3000&&&&和success这意味着clientBackground收到了正确的协议。然后，它编辑它的测试布尔值（true）。但这里有一些问题。我希望当我单击登录按钮时，将执行isLoginCheck，然后必须更改测试布尔值。但是，if(client.test){会提前执行。我想要改变处理顺序。如何更改订单..？

@Lothar PLZ帮助我。

Answer 1

您是否看到了ok等调试消息？

我可以在这里看到一些事情：

public void sendMessage(String msg2) {
    try {
        out.writeUTF(msg2);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

您永远不会刷新流，因此您的数据可能永远不会被发送出去。这样你就不会收到登录检查的结果。

while(in.available()>0)
{
    packet = in.readUTF();
    System.out.println(packet+"%%%");
}

这是在解析数据的实际循环之前的while循环。如果您的响应在此循环期间发送，则后续读取将丢失。此外，使用in.available不是读取数据的好方法。 available仅返回可以在不阻塞的情况下从流中读取的字节数。如果网络连接速度很慢，即使仍有要读取的字节，也会返回0。

while (in != null) {
    packet = in.readUTF();
    StringTokenizer st = new StringTokenizer(packet,"/");
    [...]

如果要解析的数据实际上是前一个while循环的结果，那么在重复调用in.readUTF

时用其他东西替换它

while (true) {
    Receiver receiver = new Receiver(mid_server);
    receiver.start();
}

这会在几秒钟内创建数千个线程，并且当达到允许线程的上限时，很可能会使用OutOfMemoryError终止此应用程序。

java socket（更改另一个类中的boolean）和datastream

1 个答案: