為什么它給我一個405錯誤，盡管代碼應(yīng)該在邏輯上工作，鏈接有一個有效的下載，我從互聯(lián)網(wǎng)上復(fù)制一些工作代碼，看看發(fā)生了什么，如這個主題如何下載一個圖像與Java socket HTTP / 1.1請求？它也沒有給我一個響應(yīng)200？很抱歉混亂的代碼我試圖找出問題大約2天//package htmlconnection;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.ByteArrayOutputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.MalformedURLException;import java.net.Socket;import java.net.URL;import java.net.UnknownHostException;import java.nio.charset.StandardCharsets;import javax.net.SocketFactory;import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLSocketFactory;public class MyClass {    public static void main(String args[])throws UnknownHostException, IOException {        try {            URL url =new URL("http://www.ncert.nic.in/NCERTS/l/jemh1an.pdf");            String path=url.getPath();            String domain=url.getHost();            System.out.println(path);            System.out.println(domain);            Socket socket = new Socket(domain,80);            PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())));            System.out.println(socket.isConnected());            out.println("Get "+path+" HTTP/1.1\n" +"Host: "+domain);            out.println();            out.flush();            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));            String inputLine;            while ((inputLine = in.readLine()) != null && inputLine.trim() != "0") {               System.out.println(inputLine);            }        } catch (MalformedURLException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}