我正在尝试连接一个带有图形用户界面的客户端和一个没有图形用户界面的服务器。连接已经建立,但是我无法在这两个应用程序之间看到任何消息。 (我应该在客户端中看到“SERVER HERE”,在服务器中看到“CLIENT HERE”)
客户端连接代码:
在GUI类中定义了输入和输出,该客户端类是其扩展。定义为“protected BufferedReader input; protected PrintWriter output;”。
此外,还有服务器代码:
连接似乎没问题,所以我不知道出了什么问题。任何帮助都将不胜感激。
附注:我在服务器中也尝试使用PrintWriter,并在流语句中尝试了try catch,但问题仍然存在。
客户端连接代码:
@Override
public void ClientRunning(){
try {
connectToServer();
setStreams();
ClientRun();
}catch(EOFException oefException){
showMessage("\n Client terminated the connection\n");
}catch(IOException ioException){
ioException.printStackTrace();
}finally{
close();
}
}
public void connectToServer() throws IOException{
showMessage("Attempting Connection... \n");
connection = new Socket(InetAddress.getByName(serverIP),6789);
showMessage("Connected to: "+ connection.getInetAddress().getHostName());
}
public void setStreams() throws IOException{
output = new PrintWriter(connection.getOutputStream(),true);
output.flush();
input= new BufferedReader(new InputStreamReader(connection.getInputStream()));
showMessage("\n Streams are now set. \n");
}
public void close(){
showMessage("\n closing...");
try{
output.close();
input.close();
connection.close();
}catch(IOException ioException){
ioException.printStackTrace();
}
}
public void showMessage(final String text){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
cwindow.append(text);
}
});
}
public void sendMessage(String message){
output.write("CLIENT - "+message);
output.flush();
showMessage("\nCLIENT - "+message);
}
private void ClientRun() throws IOException{
String message="CLIENT HERE!";
sendMessage(message);
do{
try{
message=input.readLine();
showMessage("\n"+message);
}catch(EOFException eofException){
showMessage("\n Server ended the connection!");
}
}while(message!="EXIT");
}
在GUI类中定义了输入和输出,该客户端类是其扩展。定义为“protected BufferedReader input; protected PrintWriter output;”。
此外,还有服务器代码:
public class ServerClass {
private ServerSocket server;
private Socket connection;
private BufferedReader input;
private BufferedWriter output;
public void startServer(){
try{
server=new ServerSocket(6789,100);
while(true){
try{
waitForConnection();
setStreams();
ServerRunning();
}catch(EOFException eofException){
showMessage("\n Server ended the connection!");
}finally{
close();
}
}
}catch(IOException ioException){
ioException.printStackTrace();
}
}
private void waitForConnection() throws IOException{
showMessage("Waiting for someone to connect... \n");
connection=server.accept();
showMessage("Now connected to "+ connection.getInetAddress().getHostName());
}
private void setStreams() throws IOException{
output = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream()));
output.flush();
input= new BufferedReader(new InputStreamReader(connection.getInputStream()));
showMessage("\n Streams are now set. \n");
}
public void ServerRunning() throws IOException{
String message="SERVER HERE!";
sendMessage(message);
do{
try{
message=input.readLine();
showMessage("\n"+message);
}catch(EOFException eofException){
showMessage("\n Server ended the connection!");
}
}while(message!="EXIT");
}
private void close(){
showMessage("\n Closing connections... \n");
try{
output.close();
input.close();
connection.close();
}catch(IOException ioException){
ioException.printStackTrace();
}
}
private void showMessage(String text){
System.out.println(text);
}
private void sendMessage(String message){
try{
output.write("SERVER - "+message);
output.flush();
showMessage(message);
}catch(IOException ioException){
System.out.println("\n ERROR!");
}
}
连接似乎没问题,所以我不知道出了什么问题。任何帮助都将不胜感激。
附注:我在服务器中也尝试使用PrintWriter,并在流语句中尝试了try catch,但问题仍然存在。
setStreams()
中的flush()
是无意义的。因为你还没有写任何东西,所以没有需要刷新的内容。你的服务器结构不支持多个客户端。 - user207421