服务器主类
import java.awt.EventQueue;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.net.ServerSocket;
import javax.swing.JScrollPane;
import javax.swing.JList;
import javax.swing.JPanel;
public class Serwer {
private JFrame frame;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Serwer window = new Serwer();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
MyServer server;
Logowanie log;
public Serwer() {
initialize();
}
public static DefaultListModel login1 = new DefaultListModel();
public static DefaultListModel haslo1 = new DefaultListModel();
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 405, 199);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton start = new JButton("Start");
start.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
try {
server = new MyServer(login1, haslo1);
log = new Logowanie(login1, haslo1);
} catch (IOException e) {
e.printStackTrace();
}
server.start();
log.start();
}
});
frame.getContentPane().add(start, BorderLayout.WEST);
JButton stop = new JButton("Stop");
stop.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if(server!=null){
server.stopserver();
server.stop();
log.stopserver();
log.stop();
haslo1.addElement(login1.size());
haslo1.addElement(login1.get(0));
}
}
});
frame.getContentPane().add(stop, BorderLayout.EAST);
JPanel panel = new JPanel();
frame.getContentPane().add(panel, BorderLayout.CENTER);
panel.setLayout(null);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(10, 11, 124, 139);
panel.add(scrollPane);
JList login = new JList(login1);
scrollPane.setViewportView(login);
JScrollPane scrollPane_1 = new JScrollPane();
scrollPane_1.setBounds(143, 11, 124, 139);
panel.add(scrollPane_1);
JList haslo = new JList(haslo1);
scrollPane_1.setViewportView(haslo);
}
}
服务器日志记录线程
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.DefaultListModel;
public class Logowanie extends Thread {
DefaultListModel login, pass;
String log;
ServerSocket serversocket;
Socket socket;
public Logowanie(DefaultListModel log, DefaultListModel pas) throws UnknownHostException, IOException{
login = log;
pass = pas;
serversocket = new ServerSocket(1235, 50, InetAddress.getByName("0.0.0.0"));
}
public void run(){
for(;;){
try{
while(true){
socket = serversocket.accept();
login.addElement("Logowanie");
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
log = in.readLine();
in.close();
for(int i = 0; i < login.size();i++){
if(login.get(i).toString().equals(log)){
PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
out.print(login.get(i).toString()+"|"+pass.get(i).toString());
out.close();
socket.close();
break;
}
}
}
}
catch(Exception e){
login.addElement(e.getMessage());
}
}
}
public void stopserver(){
try{
serversocket.close();
}
catch(IOException e){
login.addElement(e.getMessage());
}
}
}
客户端（Android）记录AsyncTask
package okar.graandro;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import android.app.Activity;
import android.content.Intent;
import android.location.GpsStatus.Listener;
import android.os.AsyncTask;
import android.widget.EditText;
public class Logowanie extends AsyncTask<Object, Void, String> {
EditText text;
EditText pass;
String msg;
int rozz;
Activity act;
public Logowanie(Activity myContext){
act = myContext;
text = (EditText) myContext.findViewById(R.id.login);
pass = (EditText) myContext.findViewById(R.id.haslo);
}
@Override
protected String doInBackground(Object... params) {
try{
Socket socket = new Socket(InetAddress.getByName("192.168.1.1"), 1235);
PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
out.print(text);
out.close();
this.wait(1000);
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
msg = in.readLine();
in.close();
socket.close();
for(int i = 0; i < msg.length(); i++){
if(msg.substring(i, i+1).equals("|")){
rozz = i;
}
}
}
catch( Exception e){
msg = e.getMessage();
}
if(msg.substring(0,rozz).equals(text.getText().toString()) && msg.substring(rozz+1,msg.length()).equals(pass.getText().toString())){
return "1";
}else{
return "0";
}
}
@Override
protected void onPostExecute(String msg) {
if(Integer.valueOf(msg) == 1){
Intent intent = new Intent(act, Mapa.class);
act.startActivity(intent);
}else{
text.setText("niepoprawne dane");
}
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(Void... values) {
}
}
我对此代码有疑问。难道我做错了什么？我应该等待还是检查线程或AsyncTask中的状态？
当我尝试使用该登录时，我收到消息＆＃34;套接字已关闭＆＃34;。
我不知道我能用它做些什么。
电贺。
02-11 21:24:57.505: E/AndroidRuntime(1159): FATAL EXCEPTION: AsyncTask #1
02-11 21:24:57.505: E/AndroidRuntime(1159): java.lang.RuntimeException: An error occured while executing doInBackground()
02-11 21:24:57.505: E/AndroidRuntime(1159): at android.os.AsyncTask$3.done(AsyncTask.java:299)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
02-11 21:24:57.505: E/AndroidRuntime(1159): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.lang.Thread.run(Thread.java:856)
02-11 21:24:57.505: E/AndroidRuntime(1159): Caused by: java.lang.NullPointerException
02-11 21:24:57.505: E/AndroidRuntime(1159): at okar.graandro.Logowanie.doInBackground(Logowanie.java:56)
02-11 21:24:57.505: E/AndroidRuntime(1159): at okar.graandro.Logowanie.doInBackground(Logowanie.java:1)
02-11 21:24:57.505: E/AndroidRuntime(1159): at android.os.AsyncTask$2.call(AsyncTask.java:287)
02-11 21:24:57.505: E/AndroidRuntime(1159): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
答案 0 :(得分：0)
您正在使用doItBackground（）方法关闭客户端中的OutputStream：
PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
out.print(text);
out.close();
关闭InputStream或OutputStream会关闭套接字，请参阅：
关闭返回的InputStream将关闭相关的套接字。
我认为你必须使用shutdownInput（）/ shutdownOutput（）方法。