socket返回数据失败

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

public class HttpServer {
    public static final String WEB_ROOT = System.getProperty("user.dir") + File.separator + "src\\main\\java\\ex01\\static";

    public static void main(String[] args) throws IOException, InterruptedException {
        HttpServer server = new HttpServer();
        server.await();
    }

    public void await(){
        ServerSocket serverSocket = null;
        int port = 8999;
        try{
            serverSocket = new ServerSocket(port,1, InetAddress.getByName("127.0.0.1"));
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
        Socket socket = null;
        try {
            socket = serverSocket.accept();
        } catch (IOException e) {
            e.printStackTrace();
        }
        PrintWriter printWriter = null;
        try {
            printWriter = new PrintWriter(socket.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
        }
        String errorMessage = "HTTP/1.1 404 File Not Found\r\n"+
                "Content-Type: text/html\r\n" +
                "Content-Length: 23\r\n" +"\n"+
                "<h1>File Not Found</h1>";
        printWriter.println(errorMessage);
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

我在浏览器访问http://127.0.0.1:8999/home 却无法访问。

输出为：

Connected to the target VM, address: '127.0.0.1:49586', transport: 'socket'
Disconnected from the target VM, address: '127.0.0.1:49586', transport: 'socket'

帮你改造了一下，你试试。可以的话，就采纳吧，加油同学。

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

    public class HttpServer {
        public static final String WEB_ROOT = System.getProperty("user.dir") + File.separator + "src\\main\\java\\ex01\\static";

        public static void main(String[] args) throws IOException, InterruptedException {
            HttpServer server = new HttpServer();
            server.await();
        }

        public void await() throws IOException {
            ServerSocket serverSocket = null;
            int port = 8999;
            try{
                serverSocket = new ServerSocket(port,1, InetAddress.getByName("localhost"));
            } catch (IOException e) {
                e.printStackTrace();
                System.exit(1);
            }
            Socket socket = null;
            try {
                socket = serverSocket.accept();

            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                BufferedReader bf = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

                String result = bf.readLine();
                System.out.println(String.format("TCP from %s: %d , receive data: %s", socket.getInetAddress(), socket.getPort(), result));
                if (result != null) {
                    String errorMessage = "HTTP/1.1 404 File Not Found\r\n"+
                            "Content-Type: text/html\r\n" +
                            "Content-Length: 23\r\n" +"\n"+
                            "<h1>File Not Found</h1>";
                    bw.write(errorMessage);
                    bw.flush();
                    System.out.println(String.format("TCP back------>ok %d",result.length()));
                }


            } catch (IOException e) {
                e.printStackTrace();
            }


            socket.close();
            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }