1 package FileDemo; 2  3 import java.io.BufferedWriter; 4 import java.io.File; 5 import java.io.FileWriter; 6 import java.io.FilenameFilter; 7 import java.io.IOException; 8 import java.util.ArrayList; 9 import java.util.List;10 11 public class FilePropertyTest {12 13     /**14      * @param args15      * @throws IOException16      */17     public static void main(String[] args) throws IOException {18 19         File dir = new File("D:\\Java");20         FilenameFilter filter = new FilenameFilter() {21 22             @Override23             public boolean accept(File dir, String name) {24 25                 return name.endsWith(".txt");26             }27         };28         List
     
       list = new ArrayList
      
       ();29         getFiles(dir, filter, list);30         File destFile = new File("D:\\destfile.txt");31         write2File(list, destFile);32     }33 34     public static void getFiles(File dir, FilenameFilter fileter,35             List
       
         list) {36         File files[] = dir.listFiles();37         for (File file : files) {38             if (file.isDirectory()) {39                 getFiles(file, fileter, list);40             } else {41                 if (fileter.accept(dir, file.getName())) {42                     list.add(file);43                 }44             }45         }46     }47 48     public static void write2File(List
        
          list, File destFile) throws IOException {49         BufferedWriter bufw = null;50         try {51             bufw = new BufferedWriter(new FileWriter(destFile));52             for (File file : list) {53                 bufw.write(file.getAbsolutePath());54                 bufw.newLine();55                 bufw.flush();56             }57         } catch (Exception e) {58             throw new RuntimeException("出现异常，写入失败");59         } finally {60             if(bufw!=null){61                 try {62                     bufw.close();63                     64                 } catch (Exception e2) {65 66                     throw new RuntimeException("关闭失败");67                 }68             }69         }70     }71 72 }