异步客户端Java套接字
因此，我正在实现一个简单的Java套接字聊天程序，但我遇到的问题是，在下面的代码中。当前，我的客户机代码异步客户端Java套接字,java,sockets,Java,Sockets,因此，我正在实现一个简单的Java套接字聊天程序，但我遇到的问题是，在下面的代码中。当前，我的客户机代码将首先从套接字读取，然后输出到屏幕，然后从控制台读取，然后输出到套接字输入。但是这种方式我无法从套接字打印消息，当它从控制台读取时，直到用户点击enter什么是解决这个问题的最佳方法，是多线程（如果是的话，我可以得到一个例子吗？），还是有其他常规方法来处理这个问题 while(true){ //read from socket, -> output
将首先从套接字读取，然后输出到屏幕然后从控制台读取，然后输出到套接字输入enter while(true){
//read from socket, -> output to screen
String line = sockin.readLine();
System.out.println(line);
//read console, -> write to socket
String consolein = consoleReader.readLine();
sockout.println(consolein);
}
是的，您应该使用多线程。您需要生成两个线程，一个用于从用户读取输入，另一个用于从服务器/另一个客户端读取输出。但，在基于控制台的聊天应用程序中使用多线程时，有一个问题是：输出和服务器分离，输入和用户分离 示例多线程客户端
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class ThreadedClient {
public static void main(String[] args) {
if (args.length != 2) {
System.err.println(
"Usage: java ThreadedClient <host name> <port number>");
System.exit(1);
}
String hostName = args[0];
int portNumber = Integer.parseInt(args[1]);
try {
Socket serverSocket = new Socket(hostName, portNumber);
ClientServerOutputReader csor = new ClientServerOutputReader(serverSocket);
csor.start();
ClientUserInputReader cuir = new ClientUserInputReader(serverSocket);
cuir.start();
} catch (UnknownHostException e) {
System.err.println("Don't know about host " + hostName);
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to " +
hostName);
System.exit(1);
}
}
}
class ClientServerOutputReader extends Thread {
Socket serverSocket;
public ClientServerOutputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(serverSocket.getInputStream()));
String outputFromServer="";
while((outputFromServer=in.readLine())!= null){
//This part is printing the output to console
//Instead it should be appending the output to some file
//or some swing element. Because this output may overlap
//the user input from console
System.out.println(outputFromServer);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class ClientUserInputReader extends Thread {
Socket serverSocket;
public ClientUserInputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run(){
BufferedReader stdIn = new BufferedReader(
new InputStreamReader(System.in));
PrintWriter out;
try {
out = new PrintWriter(serverSocket.getOutputStream(), true);
String userInput;
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
要运行：
JavaEchoServer1982import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class ThreadedClient {
public static void main(String[] args) {
if (args.length != 2) {
System.err.println(
"Usage: java ThreadedClient <host name> <port number>");
System.exit(1);
}
String hostName = args[0];
int portNumber = Integer.parseInt(args[1]);
try {
Socket serverSocket = new Socket(hostName, portNumber);
ClientServerOutputReader csor = new ClientServerOutputReader(serverSocket);
csor.start();
ClientUserInputReader cuir = new ClientUserInputReader(serverSocket);
cuir.start();
} catch (UnknownHostException e) {
System.err.println("Don't know about host " + hostName);
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to " +
hostName);
System.exit(1);
}
}
}
class ClientServerOutputReader extends Thread {
Socket serverSocket;
public ClientServerOutputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(serverSocket.getInputStream()));
String outputFromServer="";
while((outputFromServer=in.readLine())!= null){
//This part is printing the output to console
//Instead it should be appending the output to some file
//or some swing element. Because this output may overlap
//the user input from console
System.out.println(outputFromServer);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class ClientUserInputReader extends Thread {
Socket serverSocket;
public ClientUserInputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run(){
BufferedReader stdIn = new BufferedReader(
new InputStreamReader(System.in));
PrintWriter out;
try {
out = new PrintWriter(serverSocket.getOutputStream(), true);
String userInput;
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
要运行：
JavaEchoServer1982import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class ThreadedClient {
public static void main(String[] args) {
if (args.length != 2) {
System.err.println(
"Usage: java ThreadedClient <host name> <port number>");
System.exit(1);
}
String hostName = args[0];
int portNumber = Integer.parseInt(args[1]);
try {
Socket serverSocket = new Socket(hostName, portNumber);
ClientServerOutputReader csor = new ClientServerOutputReader(serverSocket);
csor.start();
ClientUserInputReader cuir = new ClientUserInputReader(serverSocket);
cuir.start();
} catch (UnknownHostException e) {
System.err.println("Don't know about host " + hostName);
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to " +
hostName);
System.exit(1);
}
}
}
class ClientServerOutputReader extends Thread {
Socket serverSocket;
public ClientServerOutputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(serverSocket.getInputStream()));
String outputFromServer="";
while((outputFromServer=in.readLine())!= null){
//This part is printing the output to console
//Instead it should be appending the output to some file
//or some swing element. Because this output may overlap
//the user input from console
System.out.println(outputFromServer);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class ClientUserInputReader extends Thread {
Socket serverSocket;
public ClientUserInputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run(){
BufferedReader stdIn = new BufferedReader(
new InputStreamReader(System.in));
PrintWriter out;
try {
out = new PrintWriter(serverSocket.getOutputStream(), true);
String userInput;
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
要运行：
JavaEchoServer1982import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class ThreadedClient {
public static void main(String[] args) {
if (args.length != 2) {
System.err.println(
"Usage: java ThreadedClient <host name> <port number>");
System.exit(1);
}
String hostName = args[0];
int portNumber = Integer.parseInt(args[1]);
try {
Socket serverSocket = new Socket(hostName, portNumber);
ClientServerOutputReader csor = new ClientServerOutputReader(serverSocket);
csor.start();
ClientUserInputReader cuir = new ClientUserInputReader(serverSocket);
cuir.start();
} catch (UnknownHostException e) {
System.err.println("Don't know about host " + hostName);
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to " +
hostName);
System.exit(1);
}
}
}
class ClientServerOutputReader extends Thread {
Socket serverSocket;
public ClientServerOutputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(
new InputStreamReader(serverSocket.getInputStream()));
String outputFromServer="";
while((outputFromServer=in.readLine())!= null){
//This part is printing the output to console
//Instead it should be appending the output to some file
//or some swing element. Because this output may overlap
//the user input from console
System.out.println(outputFromServer);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
class ClientUserInputReader extends Thread {
Socket serverSocket;
public ClientUserInputReader(Socket serverSocket){
this.serverSocket = serverSocket;
}
public void run(){
BufferedReader stdIn = new BufferedReader(
new InputStreamReader(System.in));
PrintWriter out;
try {
out = new PrintWriter(serverSocket.getOutputStream(), true);
String userInput;
while ((userInput = stdIn.readLine()) != null) {
out.println(userInput);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
运行：
javaechoserver1982