Java 能够发送http请求的TCP连接

我正在尝试构建一个能够接收、处理和响应http请求的简单web服务器（TCP）。我已经在客户端和服务器之间建立了TCP连接，问题是，尽管我已经尝试过了，但我还没有成功地执行http请求。 以下是Java中的客户端和服务器代码：

客户端类：

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.net.Socket;

import java.net.UnknownHostException;

public class SocketCliente {

private String hostname;
private int porta;
Socket socketCliente;

public SocketCliente(String hostname, int porta){
    this.hostname = hostname;
    this.porta = porta;
}

public void connect() throws UnknownHostException, IOException{
    System.out.println("Tentando se conectar com "+hostname+":"+porta);
    socketCliente = new Socket(hostname,porta);
    System.out.println("A conexão foi realizada");
}

public void readResponse() throws IOException{
    String userInput;
    BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));

    System.out.println("Responsta do servidor:");
    while ((userInput = stdIn.readLine()) != null) {
        System.out.println(userInput);
    }
}

public static void main(String arg[]){
    //Creating a SocketClient object
    SocketCliente client = new SocketCliente ("localhost",30000);
    try {
        //trying to establish connection to the server
        client.connect();
        //if successful, read response from server
        client.readResponse();

    } catch (UnknownHostException e) {
        System.err.println("A conexão não pode ser estabelecida.");
    } catch (IOException e) {
        System.err.println("Conexão não estabelecida, pois o servidor pode ter problemas."+e.getMessage());
    }
}
}

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class SocketCliente {
private String hostname;
private int porta;
Socket socketCliente;

public SocketCliente(String hostname, int porta){
    this.hostname = hostname;
    this.porta = porta;
}

public void connect() throws UnknownHostException, IOException{
    System.out.println("Tentando se conectar com "+hostname+":"+porta);
    socketCliente = new Socket(hostname,porta);
    System.out.println("A conexão foi realizada");
}

public void readResponse() throws IOException{
    String userInput;
    BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));

    System.out.println("Responsta do servidor:");
    while ((userInput = stdIn.readLine()) != null) {
        System.out.println(userInput);
    }
}
public void HTTPCliente() throws Exception{
    PrintWriter out = new PrintWriter(new OutputStreamWriter(socketCliente.getOutputStream()));
    System.out.println("GET / HTTP/1.1");
    System.out.println("User-Agent: test/1.0");
    System.out.println("Host: localhost");
    System.out.println("Accept: */*");
}

public static void main(String arg[]){
    //Creating a SocketClient object
    SocketCliente client = new SocketCliente ("localhost",30000);
    try {
        //trying to establish connection to the server
        client.connect();
        //if successful, read response from server
        client.readResponse();
        try {
            //se http obtiver sucesso
            client.HTTPCliente();
        } catch (Exception ex) {
            Logger.getLogger(SocketCliente.class.getName()).log(Level.SEVERE, null, ex);
        }

    } catch (UnknownHostException e) {
        System.err.println("A conexão não pode ser estabelecida.");
    } catch (IOException e) {
        System.err.println("Conexão não pode ser feita por problemas no servidor."+e.getMessage());
    }
}

服务器类

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;


public class SocketServidor {

private ServerSocket serverSocket;
private int porta;

public SocketServidor(int porta) {
    this.porta = porta;
}

public void start() throws IOException {
    System.out.println("Começando o servidor na porta:" + porta);
    serverSocket = new ServerSocket(porta);

    //Listen for clients. Block till one connects

    System.out.println("Esperando o cliente");
    Socket client = serverSocket.accept();

    //A client has connected to this server. Send welcome message
    sendMensagemDeBoasVindas(client);
}

private void sendMensagemDeBoasVindas(Socket cliente) throws IOException {
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(cliente.getOutputStream()));
    writer.write("A sua conexão com o SocketServidor foi feita");
    writer.flush();
}

/**
* Creates a SocketServer object and starts the server.
*
* @param 
*/
public static void main(String[] args) {
    // Setting a default port number.
    int portNumber = 30000;

    try {
        // initializing the Socket Server
        SocketServidor socketServer = new SocketServidor(portNumber);
        socketServer.start();

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

我真的不知道如何发出http请求。我尝试过创建一个http类，尝试过从现有的客户机类发送请求，但到目前为止没有任何效果。所有的谷歌搜索都没有帮助

一位朋友也在尝试这样做，他告诉我，在客户机类建立连接之后，需要将请求从客户机类发送到服务器类。我该怎么做

拜托，你能帮我吗

@罗宾格林 客户端类：

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.net.Socket;

import java.net.UnknownHostException;

public class SocketCliente {

private String hostname;
private int porta;
Socket socketCliente;

public SocketCliente(String hostname, int porta){
    this.hostname = hostname;
    this.porta = porta;
}

public void connect() throws UnknownHostException, IOException{
    System.out.println("Tentando se conectar com "+hostname+":"+porta);
    socketCliente = new Socket(hostname,porta);
    System.out.println("A conexão foi realizada");
}

public void readResponse() throws IOException{
    String userInput;
    BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));

    System.out.println("Responsta do servidor:");
    while ((userInput = stdIn.readLine()) != null) {
        System.out.println(userInput);
    }
}

public static void main(String arg[]){
    //Creating a SocketClient object
    SocketCliente client = new SocketCliente ("localhost",30000);
    try {
        //trying to establish connection to the server
        client.connect();
        //if successful, read response from server
        client.readResponse();

    } catch (UnknownHostException e) {
        System.err.println("A conexão não pode ser estabelecida.");
    } catch (IOException e) {
        System.err.println("Conexão não estabelecida, pois o servidor pode ter problemas."+e.getMessage());
    }
}
}

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class SocketCliente {
private String hostname;
private int porta;
Socket socketCliente;

public SocketCliente(String hostname, int porta){
    this.hostname = hostname;
    this.porta = porta;
}

public void connect() throws UnknownHostException, IOException{
    System.out.println("Tentando se conectar com "+hostname+":"+porta);
    socketCliente = new Socket(hostname,porta);
    System.out.println("A conexão foi realizada");
}

public void readResponse() throws IOException{
    String userInput;
    BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));

    System.out.println("Responsta do servidor:");
    while ((userInput = stdIn.readLine()) != null) {
        System.out.println(userInput);
    }
}
public void HTTPCliente() throws Exception{
    PrintWriter out = new PrintWriter(new OutputStreamWriter(socketCliente.getOutputStream()));
    System.out.println("GET / HTTP/1.1");
    System.out.println("User-Agent: test/1.0");
    System.out.println("Host: localhost");
    System.out.println("Accept: */*");
}

public static void main(String arg[]){
    //Creating a SocketClient object
    SocketCliente client = new SocketCliente ("localhost",30000);
    try {
        //trying to establish connection to the server
        client.connect();
        //if successful, read response from server
        client.readResponse();
        try {
            //se http obtiver sucesso
            client.HTTPCliente();
        } catch (Exception ex) {
            Logger.getLogger(SocketCliente.class.getName()).log(Level.SEVERE, null, ex);
        }

    } catch (UnknownHostException e) {
        System.err.println("A conexão não pode ser estabelecida.");
    } catch (IOException e) {
        System.err.println("Conexão não pode ser feita por problemas no servidor."+e.getMessage());
    }
}

---

}

您需要发送以下内容：

GET / HTTP/1.1
User-Agent: test/1.0
Host: localhost
Accept: */*

所以也许：

PrintWriter out = new PrintWriter(new OutputStreamWriter(socketCliente.getOutputStream()));
out.println("GET / HTTP/1.1");
out.println("User-Agent: test/1.0");
out.println("Host: localhost");
out.println("Accept: */*");

---

但顺便说一句，这是一种低级的、更复杂的方法。使用高级API更容易做到这一点。但我不知道，这可能是家庭作业中不允许的。

请给我们看一下您试图从客户那里发送请求的代码。很抱歉，我现在没有它：很遗憾，我把它忘在了学校实验室的计算机上。好的。我在我的客户机类中尝试了这一点，但什么也没发生：它没有打印或给出错误。那么，服务器在这个过程中做什么呢？我如何让他得到这个请求？附言：谢谢你的回答！HTTP是一种协议，允许请求以特定资源为目标。因为您只有一个资源，所以可以忽略请求中的数据，但这是一种欺骗。因此，实际上您应该解析请求的第一行，从中提取URL（/在本例中），如果它是您期望的，则生成适当的HTTP响应。至于为什么什么都没发生，我不知道-请发布你的更新代码。抱歉耽搁了。我已经更新了代码。再次感谢您的帮助。对不起，这还不够详细。当你回到电脑前，请把实际的代码贴出来。是我现在带着的代码还是我留在学校的代码？因为我在学校的那一个我只能在星期三拿到。。。