filefilter使用方法.docx

filefilter使用方法filefilter使用方法，计算目录层次，列出目录下所有带指定扩展名的文件名 import java.io.*; import java.util.Date; /* * Created by xcl on 15-10-16. */ public class IO public static void main(String args) throws Exception File f = new File("/home/xcl/桌面/workspace"); processAFile a = new IO.new processAFile; /System.out.println("目录层次:"+a.listDirectoray(f); a.listExtension(f,".o"); class processAFile public int count=1; public processAFile public int max(int a,int b) return a>b?a:b; public void listExtension(File f,String Extension) if(f.isDirectory)/如果是目录 File fs=f.listFiles; for(int i=0;i<fs.length;i+) listExtension(fsi,Extension); else/如果是文件 if(f.getName.endsWith(Extension) System.out.println("带扩展名"+Extension+"的文件"+f.getAbsolutePath); public int listDirectoray(File f) /该函数返回当前目录的层次 int maxCount=0;/当前目录下的最高层次 System.out.println("directoray:" + f.getAbsolutePath); File fs = f.listFiles(new FileFilter Override public boolean accept(File file) return file.isDirectory; ); for (int i = 0; i < fs.length; i+) maxCount=max(maxCount,listDirectoray(fsi); return maxCount+1;