收发字符串

直接使用字节流收发字符串比较麻烦，使用数据流对字节流进行封装，这样收发字符串就容易了
1. 把输出流封装在DataOutputStream中
使用writeUTF发送字符串 "Legendary!"
2. 把输入流封装在DataInputStream
使用readUTF读取字符串,并打印

package socket;
 
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
 
public class Server {
 
    public static void main(String[] args) {
        try {
 
            ServerSocket ss = new ServerSocket(8888);
 
            System.out.println("监听在端口号:8888");
            Socket s = ss.accept();
 
            InputStream is = s.getInputStream();
 
            //把输入流封装在DataInputStream
            DataInputStream dis = new DataInputStream(is);
            //使用readUTF读取字符串
            String msg = dis.readUTF();
            System.out.println(msg);
            dis.close();
            s.close();
            ss.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
 
    }
}



 




package socket;
 
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
 
public class Client {
 
    public static void main(String[] args) {
 
        try {
            Socket s = new Socket("127.0.0.1", 8888);
 
            OutputStream os = s.getOutputStream();
 
            //把输出流封装在DataOutputStream中
            DataOutputStream dos = new DataOutputStream(os);
            //使用writeUTF发送字符串
            dos.writeUTF("Legendary!");
            dos.close();
            s.close();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}