按文件名排序

 

/**     * 按文件名排序     * @param filePath     */    public static ArrayList
     
       orderByName(String filePath) {        ArrayList
      
        FileNameList = new ArrayList
       
        ();        File file = new File(filePath);        File[] files = file.listFiles();        List fileList = Arrays.asList(files);        Collections.sort(fileList, new Comparator
        
         () {            @Override            public int compare(File o1, File o2) {                if (o1.isDirectory() && o2.isFile())                    return -1;                if (o1.isFile() && o2.isDirectory())                    return 1;                return o1.getName().compareTo(o2.getName());            }        });        for (File file1 : files) {            if (file1.isDirectory()) {                FileNameList.add(file1.getName());            }        }        return FileNameList;    }
        
       
      
     

 

基于名称：

/**     * 按文件名排序     * @param filePath     */    public static ArrayList
    
      orderByName(String filePath) {        ArrayList
     
       FileNameList = new ArrayList
      
       ();        File file = new File(filePath);        File[] files = file.listFiles();        List fileList = Arrays.asList(files);        Collections.sort(fileList, new Comparator
       
        () {            @Override            public int compare(File o1, File o2) {                if (o1.isDirectory() && o2.isFile())                    return -1;                if (o1.isFile() && o2.isDirectory())                    return 1;                return o1.getName().compareTo(o2.getName());            }        });        for (File file1 : files) {            if (file1.isDirectory()) {                FileNameList.add(file1.getName());            }        }        return FileNameList;    }
       
      
     
    

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26

基于最近修改时间：

/**     * 按文件修改时间排序     * @param filePath     */    public static ArrayList
    
      orderByDate(String filePath) {        ArrayList
     
       FileNameList = new ArrayList
      
       ();        File file = new File(filePath);        File[] files = file.listFiles();        Arrays.sort(files, new Comparator
       
        () {            public int compare(File f1, File f2) {                long diff = f1.lastModified() - f2.lastModified();                if (diff > 0)                    return 1;                else if (diff == 0)                    return 0;                else                    return -1;// 如果 if 中修改为 返回-1 同时此处修改为返回 1 排序就会是递减            }            public boolean equals(Object obj) {                return true;            }        });        for (File file1 : files) {            if (file1.isDirectory()) {                FileNameList.add(file1.getName());            }        }        return FileNameList;    }
       
      
     
    

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32

基于大小：

/**     * 按文件大小排序     * @param filePath     */    public static ArrayList
    
      orderBySize(String filePath) {        ArrayList
     
       FileNameList = new ArrayList
      
       ();        File file = new File(filePath);        File[] files = file.listFiles();        List
       
         fileList = Arrays.asList(files);        Collections.sort(fileList, new Comparator
        
         () {            public int compare(File f1, File f2) {                long s1 = getFolderSize(f1);                long s2 = getFolderSize(f2);                long diff = s1 - s2;                if (diff > 0)                    return 1;                else if (diff == 0)                    return 0;                else                    return -1;// 如果 if 中修改为 返回-1 同时此处修改为返回 1 排序就会是递减            }            public boolean equals(Object obj) {                return true;            }        });        for (File file1 : files) {            if (file1.isDirectory()) {                FileNameList.add(file1.getName());            }        }        return FileNameList;    }    /**     * 获取文件夹大小     * @param file File实例     * @return long     */    public static long getFolderSize(File file) {        long size = 0;        try {            java.io.File[] fileList = file.listFiles();            for (int i = 0; i < fileList.length; i++) {                if (fileList[i].isDirectory()) {                    size = size + getFolderSize(fileList[i]);                } else {                    size = size + fileList[i].length();                }            }        } catch (Exception e) {            e.printStackTrace();        }        return size;    }