文件下載器更新系統崩潰

Question

我目前正在編寫一個應用程序在Java中安裝mods到我的世界和更新/第一次運行系統崩潰時，它試圖下載所需的文件，我得到以下異常

java.io.IOException: Access is denied 
    at java.io.WinNTFileSystem.createFileExclusively(Native Method) 
    at java.io.File.createNewFile(Unknown Source) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:43) 
    at com.hachisoftware.mat.launcher.Main.setup(Main.java:22) 
    at com.hachisoftware.mat.launcher.Main.main(Main.java:15) 
java.io.FileNotFoundException: \Gui.jar (Access is denied) 
    at java.io.FileOutputStream.open(Native Method) 
    at java.io.FileOutputStream.<init>(Unknown Source) 
    at java.io.FileOutputStream.<init>(Unknown Source) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:71) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:45) 
    at com.hachisoftware.mat.launcher.Main.setup(Main.java:22) 
    at com.hachisoftware.mat.launcher.Main.main(Main.java:15) 
java.io.IOException: Access is denied 
    at java.io.WinNTFileSystem.createFileExclusively(Native Method) 
    at java.io.File.createNewFile(Unknown Source) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:43) 
    at com.hachisoftware.mat.launcher.Main.setup(Main.java:23) 
    at com.hachisoftware.mat.launcher.Main.main(Main.java:15) 
java.io.FileNotFoundException: \IntelliMod.jar (Access is denied) 
    at java.io.FileOutputStream.open(Native Method) 
    at java.io.FileOutputStream.<init>(Unknown Source) 
    at java.io.FileOutputStream.<init>(Unknown Source) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:71) 
    at com.hachisoftware.mat.launcher.Util.getFileFromWeb(Util.java:45) 
    at com.hachisoftware.mat.launcher.Main.setup(Main.java:23) 
    at com.hachisoftware.mat.launcher.Main.main(Main.java:15) 

我用下面的代碼的下載

public static boolean getFileFromWeb(String location, String destination) 
{ 
    String[] s = location.split("/"); 
    String s2 = s[s.length - 1]; 

    if(!"".equals(destination) && !(new File(destination)).exists()) 
     (new File(destination)).mkdir(); 

    File outFile = new File(destination, s2); 
    if(!outFile.exists()) 
     try { outFile.createNewFile(); } catch(Exception e) { e.printStackTrace(); } 

    return getFileFromWeb(outFile, location); 
} 

public static boolean getFileFromWeb(File outFile, String location) 
{ 
    BufferedInputStream in = null; 
    BufferedOutputStream out = null; 

    try 
    { 
     URL url = new URL(location); 
     URLConnection urlc = url.openConnection(); 
     urlc.setRequestProperty("User-Agent", "HS File Downloader(" + clientName + ")"); 
     in = new BufferedInputStream(urlc.getInputStream()); 
     out = new BufferedOutputStream(new FileOutputStream(outFile)); 
     byte[] dataBuffer = new byte[4096 * 1024]; 

     for(int line = in.read(dataBuffer); line != -1; line = in.read(dataBuffer)) 
     { 
      out.write(dataBuffer, 0, line); 
      out.flush(); 
     } 

     in.close(); 
     out.close(); 
    } 
    catch(Exception e) 
    { 
     e.printStackTrace(); 
     return false; 
    } 

    return true; 
} 

任何幫助或建議，歡迎

Answer 1

異常明確表示

java.io.IOException: Access is denied 

java.io.FileNotFoundException: \Gui.jar (Access is denied) 

確保您的程序有權訪問文件系統。