編寫用於下載zip文件的代碼時出現I/O錯誤

-1

我需要從一個URL下載zip文件。下面是我寫的代碼：編寫用於下載zip文件的代碼時出現I/O錯誤

package Sample2; 
import java.io.BufferedInputStream; 
import java.io.BufferedOutputStream; 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.net.Authenticator; 
import java.net.InetAddress; 
import java.net.MalformedURLException; 
import java.net.PasswordAuthentication; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.Enumeration; 
import java.util.zip.ZipEntry; 
import java.util.zip.ZipFile; 

public class MonthlyDB1 { 


    public static void main(String[] args) throws IOException { 
     URLConnection con = null; 

     //int i; 
      try { 
       Authenticator.setDefault(new CustomAuthenticator()); 
       URL url = new URL("http://www.g1.com/Support/download.asp?fn=2LL\\ASCII\\2LL092015_200.zip&type=db&asset=1-JOKWT&dbAsset=1-JOKY2"); 
       ZipFile zipFile = new ZipFile("http://dl.g1.com/Release/databases/DPV/OPEN_SYSTEM/DPV102015_200.ZIP"); 
       File file= new File("Desktop\\DPV.zip"); 
       //BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()) 
       con = url.openConnection(); 
       BufferedInputStream bis = new BufferedInputStream( 
         con.getInputStream()); 
       BufferedOutputStream bos = new BufferedOutputStream( 
         new FileOutputStream(file.getName())); 
       Enumeration en = zipFile.entries(); 

        while(en.hasMoreElements()){ 
         ZipEntry entry = (ZipEntry)en.nextElement(); 
         String entryName = entry.getName(); 
         long compressedSize = entry.getCompressedSize(); 
        byte[] b = new byte[(int) compressedSize]; 
        int count; 
        while ((count = bis.read(b)) > 0) { 
        bos.write(b, 0, count); 
       }} 
       bos.flush(); 
       bis.close(); 
      } 
      catch (MalformedURLException e) { 
       System.out.println("Malformed URL: " + e.getMessage()); 
      } 
      catch (IOException e) { 
       System.out.println("I/O Error: " + e.getMessage()); 
      } 
     } 
     public static class CustomAuthenticator extends Authenticator { 
      protected PasswordAuthentication getPasswordAuthentication() { 
       String prompt = getRequestingPrompt(); 
       String hostname = getRequestingHost(); 
       InetAddress ipaddr = getRequestingSite(); 
       int port = getRequestingPort(); 
       String username = "stov1jypf6"; 
       String password = "1jypf6"; 
       // Return the information (a data holder that is used by Authenticator) 
       return new PasswordAuthentication(username, password.toCharArray()); 
      } 
     } 

    }

但是下面是我得到的錯誤;

I/O錯誤：HTTP：\ dl.g1.com \發佈\數據庫\ DPV \ OPEN_SYSTEM \ DPV102015_200.ZIP（文件名，目錄名或卷標語法不正確）

來源

2015-11-14 sarah

您似乎試圖打開名稱實際上是URL的ZipFile。「ZipFile」只適用於文件，不適用於URL。此外，您似乎試圖從「ZipFile」中讀取條目，但是從URL連接中讀取數據。他們不相關，所以你如何期待這個工作？ – RealSkeptic

你爲什麼即使打擾試圖打開一個Zip*Stream因爲你想要做的就是複製zip？

代碼下載zip得多，簡單得多：

final Path dst = Paths.get("Desktop\\DPV.zip"); 

final URL url = ...; 

try (
    final InputStream in = url.openStream(); 
) { 
    Files.copy(in, dst); 
}

嗯，這是粗版本;還有一個問題是，您似乎無法在任何地方使用您的身份驗證。您可能打算使用支持身份驗證的HTTP客戶端，而不是來自URL的原始流。

來源

2015-11-14 12:21:59 fge

編寫用於下載zip文件的代碼時出現I/O錯誤

回答

相關問題