如何在不打开浏览器的情况下在指定目录的url内容中下载文件？ [英] how to download the file in the url content in specified directory without opening the browser?

问题描述

import java.net.MalformedURLException;
import java.net.URL;
import java.security.cert.Certificate;
import java.io.*;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;

public class HttpsClient{
	
   public static void main(String[] args)
   {
        new HttpsClient().testIt();
   }
	
   private void testIt(){

      String https_url = "https://www.google.com/";
      URL url;
      try {

	     url = new URL(https_url);
	     HttpsURLConnection con = (HttpsURLConnection)url.openConnection();
			
	     //dumpl all cert info
	     print_https_cert(con);
			
	     //dump all the content
	     print_content(con);
			
      } catch (MalformedURLException e) {
	     e.printStackTrace();
      } catch (IOException e) {
	     e.printStackTrace();
      }

   }
	
   private void print_https_cert(HttpsURLConnection con){
     
    if(con!=null){
			
      try {
				
	System.out.println("Response Code : " + con.getResponseCode());
	System.out.println("Cipher Suite : " + con.getCipherSuite());
	System.out.println("\n");
				
	Certificate[] certs = con.getServerCertificates();
	for(Certificate cert : certs){
	   System.out.println("Cert Type : " + cert.getType());
	   System.out.println("Cert Hash Code : " + cert.hashCode());
	   System.out.println("Cert Public Key Algorithm : " 
                                    + cert.getPublicKey().getAlgorithm());
	   System.out.println("Cert Public Key Format : " 
                                    + cert.getPublicKey().getFormat());
	   System.out.println("\n");
	}
				
	} catch (SSLPeerUnverifiedException e) {
		e.printStackTrace();
	} catch (IOException e){
		e.printStackTrace();
	}

     }
	
   }
	
   private void print_content(HttpsURLConnection con){
	if(con!=null){
			
	try {
		
	   System.out.println("****** Content of the URL ********");			
	   BufferedReader br = 
		new BufferedReader(
			new InputStreamReader(con.getInputStream()));
				
	   String input;
				
	   while ((input = br.readLine()) != null){
	      System.out.println(input);
	   }
	   br.close();
				
	} catch (IOException e) {
	   e.printStackTrace();
	}
			
       }
		
   }
	
}

此代码只执行内容....但我希望下载的URL文件在我指定的目录中....



任何人都可以请我这个....

this code is just executing only the content.... but i want the downloaded URL file in my specified directory....

can anybody please me for that....

推荐答案

你有两个问题，你需要改变



String https_url =https://www.google.com/;指向你的文件



和



print_content例程因为这只显示在控制台上。 />


谷歌有很多例子，这样的东西可能符合你的要求



从网上下载 [ ^ ]



问候



/ Darren

You have two issues, you will need to change

String https_url = "https://www.google.com/"; to point to your file

and

print_content routine because this only displays to the console.

Google has many examples and something like this may fit your requirements

download from the web[^]

Regards

/Darren

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