ava按文件大小、名称、日期排序方法代码,Java代码库,德仔网

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【Java】 ava按文件大小、名称、日期排序方法

作者:灵栅 / 发布于2014/10/29/ 535


	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() && o2.isFile())
	 return -1;
	if (o1.isFile() && 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");
	 }
	}

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