如何阻止用戶使用java訪問目錄？

Question

java是否可以修改目錄權限，以便任何人都無法訪問該目錄內的內容。

Answer 1

您可以使用方法File對象上這個

• boolean setWritable(boolean writable, boolean ownerOnly)
• boolean setReadable(boolean readable, boolean ownerOnly)
• boolean setExecutable(boolean executable,boolean ownerOnly)

File dir = new File("my directory"); 
dir.mkdir(); 

// Make it not readable, writable and executable for anyone 
dir.setExecutable(false, false); 
dir.setReadable(false, false); 
dir.setWritable(false, false); 

// Make it readable, writable and executable for the owner only (see 
// second parameter "ownerOnly" to these calls) 
dir.setExecutable(true, true); 
dir.setReadable(true, true); 
dir.setWritable(true, true); 

Java的NIO API有更細粒度控制做同樣的，如

• Path setPosixFilePermissions(Path path, Set<PosixFilePermission> perms)