java按文件大小、名称、日期排序方法，java日期排序, //java按文

java按文件大小、名称、日期排序方法，java日期排序, //java按文

    //java按文件大小、名称、日期排序      //java按文件大小、名称、日期排序方法      import java.io.*;      import java.util.*;       public class FileOrder{      //按照文件大小排序        public static void orderByLength(String fliePath) {       List< File> files = Arrays.asList(new File(fliePath).listFiles());       Collections.sort(files, new Comparator< File>() {           public int compare(File f1, File f2) {          long diff = f1.length() - f2.length();          if (diff > 0)            return 1;          else if (diff == 0)            return 0;          else            return -1;           }          public boolean equals(Object obj) {          return true;          }         });         for (File f : files) {            if(f.isDirectory()) continue;            System.out.println(f.getName()+":"+f.length());         }      }      //按照文件名称排序      public static void orderByName(String fliePath) {        List files = Arrays.asList(new File(fliePath).listFiles());        Collections.sort(files, new Comparator< File>() {         @Override         public int compare(File o1, File o2) {          if (o1.isDirectory() &amp;&amp; o2.isFile())                return -1;          if (o1.isFile() &amp;&amp; o2.isDirectory())                return 1;          return o1.getName().compareTo(o2.getName());         }        });         for (File f : files) {           System.out.println(f.getName());          }        }      //按日期排序      public static void orderByDate(String fliePath) {         File file = new File(fliePath);         File[] fs = file.listFiles();         Arrays.sort(fs,new Comparator< File>(){           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;           }           public boolean equals(Object obj) {          return true;           }           });           for (int i = fs.length-1; i >-1; i--) {          System.out.println(fs[i].getName());          System.out.println(new Date(fs[i].lastModified()));            }        }         public static void main(String args[]){            // orderByLength("c:/java");            // orderByName("c:/java");            orderByDate("c:/java");            }      }