* 支持文件权限

langx-java/src/main/java/com/jn/langx/util/io/file/FilePermission.java

@@ -0,0 +1,118 @@
+package com.jn.langx.util.io.file;
+
+
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+public enum FilePermission {
+
+    /***
+     *           user group other
+     *            RWX   RWX   RWX
+     *  二进制     110   100   100
+     *
+     * 以0开始的数字，代表了是 8进制的。
+     * 以 0x 开始的数字，代表是 16进制的
+     */
+
+    /**
+     * read permission, owner
+     */
+    USR_R(00400),
+    /**
+     * write permission, owner
+     */
+    USR_W(00200),
+    /**
+     * execute/search permission, owner
+     */
+    USR_X(00100),
+    /**
+     * read permission, group
+     */
+    GRP_R(00040),
+    /**
+     * write permission, group
+     */
+    GRP_W(00020),
+    /**
+     * execute/search permission, group
+     */
+    GRP_X(00010),
+    /**
+     * read permission, others
+     */
+    OTH_R(00004),
+    /**
+     * write permission, others
+     */
+    OTH_W(00002),
+    /**
+     * execute/search permission, group
+     */
+    OTH_X(00001),
+    /**
+     * set-user-ID on execution
+     */
+    SUID(04000),
+    /**
+     * set-group-ID on execution
+     */
+    SGID(02000),
+    /**
+     * on directories, restricted deletion flag
+     */
+    STICKY(01000),
+    // Composite:
+    /**
+     * read, write, execute/search by user
+     */
+    USR_RWX(USR_R, USR_W, USR_X),
+    /**
+     * read, write, execute/search by group
+     */
+    GRP_RWX(GRP_R, GRP_W, GRP_X),
+    /**
+     * read, write, execute/search by other
+     */
+    OTH_RWX(OTH_R, OTH_W, OTH_X);
+
+    private final int val;
+
+    FilePermission(int val) {
+        this.val = val;
+    }
+
+    FilePermission(FilePermission... perms) {
+        int val = 0;
+        for (FilePermission perm : perms) {
+            val |= perm.val;
+        }
+        this.val = val;
+    }
+
+    public boolean isIn(int mask) {
+        return (mask & val) == val;
+    }
+
+    public static Set<FilePermission> fromMask(int mask) {
+        final List<FilePermission> perms = new LinkedList<FilePermission>();
+        for (FilePermission p : FilePermission.values()) {
+            if (p.isIn(mask)) {
+                perms.add(p);
+            }
+        }
+        return new HashSet<FilePermission>(perms);
+    }
+
+    public static int toMask(Set<FilePermission> perms) {
+        int mask = 0;
+        for (FilePermission p : perms) {
+            mask |= p.val;
+        }
+        return mask;
+    }
+
+}

langx-java/src/main/java/com/jn/langx/util/io/file/Filenames.java

@@ -130,6 +130,11 @@ public static String asUnixFilePath(String filePath) {
         return filePath.trim().replaceAll("\\\\", "/").replaceAll("/+", "/");
     }
 
+    public static String getParentPath(String filepath){
+        String filename = extractFilename(filepath);
+        return filepath.substring(0,filepath.length() - filename.length());
+    }
+
     public static String extractFilename(String filePath) {
         return extractFilename(filePath, true);
     }