请求朋友原谅的语句,Html文档若想请求到服务器端的消息，服务器端必须要有echo语句吗

请求朋友原谅的语句,Html文档若想请求到服务器端的消息，服务器端必须要有echo语句吗

java socket客户端向服务器端发送消息，可以使用socket类，实例如下：
mport java.io.*;
import java.net.*;
public class EchoClient {
public static void main(String args[]) {
try {
Socket connection =new Socket(127.0.0.1, 5050);
BufferedReader input = new BufferedReader(new InputStreamReader(
connection.getInputStream()));PrintWriter out = new PrintWriter(connection.getOutputStream(),true );
String info;
info = input.readLine();
System.out.println(info);
boolean done = false;
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String sInput;//out.println(BYE);
while (!done) {
info = input.readLine();
System.out.println(info);}
connection.close();
}
catch (SecurityException e) {
System.out.println(SecurityException when connecting Server!);
}
catch (IOException e) {
System.out.println(IOException when connecting Server!);
}
}
}

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