我正在尝试创建一个简单的Java程序,其中客户端和服务器都将能够发送和获取字符串和整数。我可以仅使用字符串或仅使用整数来完成工作,但是我发现很难将它们组合而不会弄乱。如果有人可以告诉我最简单的方法,我将不胜感激。这是我到目前为止所做的,但返回的数字有误。
MyServer.java
package myserver;
import java.io.DataInputStream;
import java.util.Random;
import java.io.*;
import java.net.*;
public class MyServer
{
public static void main(String argv[]) throws Exception
{
String clientSentence;
String answer;
ServerSocket welcomeSocket = new ServerSocket(6789);
Socket connectionSocket = welcomeSocket.accept();
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
clientSentence = inFromClient.readLine();
Random rand = new Random();
int n = rand.nextInt(100) + 1;
System.out.println("Received: " + clientSentence);
answer = "Hey " + clientSentence + " guess a number from 1 to 100!" + '\n';
outToClient.writeBytes(answer);
DataInputStream integerFromClient = new DataInputStream(connectionSocket.getInputStream());
int k = integerFromClient.readInt();
System.out.println(k);
}
}
MyClient.java
package myserver;
import java.io.*;
import java.net.*;
class MyClient
{
public static void main(String argv[]) throws Exception
{
String sentence;
String modifiedSentence;
BufferedReader inFromUser = new BufferedReader( new InputStreamReader(System.in));
Socket clientSocket = new Socket("localhost", 6789);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
sentence = inFromUser.readLine();
outToServer.writeBytes(sentence + '\n');
modifiedSentence = inFromServer.readLine();
System.out.println("SERVER: " + modifiedSentence);
int k = inFromUser.read();
outToServer.writeInt(k);
clientSocket.close();
}
}
我建议您使用包裹在BufferedInputStream / BufferedOutputStream周围的DataInputStream / DataOutputStream。这将允许您发送
dos.writeUTF(string);
String s = dis.readUTF();
或者
dos.writeInt(n);
int i = dis.readInt();
如果您不知道将要使用的类型,则可以使用这样的字节。
dos.writeByte('S');
dos.writeUTF(string);
dos.writeByte('i');
dos.writeInt(n);
和
for(int code; (code = dis.read()) != -1;) {
switch(code) {
case 'S':
String s = dis.readUTF();
process(s);
break;
case 'i':
int i = dis.readInt();
process(i);
break;
default:
throw new StreamCorruptedException("code: "+code);
}
}
您可以将其扩展为发送复杂的数据结构。
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句