io 遍历文件目录并写入文件

 1 public class Test {
 2 
 3     /**
 4      * @param args
 5      */
 6     public static void main(String[] args) {
 7         // TODO Auto-generated method stub
 8         File dir = new File("E:\\Test\\JAVA");
 9         FilenameFilter filter = new FilenameFilter() {
10 
11             @Override
12             public boolean accept(File dir, String name) {
13                 // TODO Auto-generated method stub
14                 return name.endsWith(".java");
15             }
16         };
17         List<File> list = new ArrayList<File>();
18         getFiles(dir, filter, list);
19         File destFile = new File(dir, "javalist.txt");
20         writeToFile(list, destFile);
21 
22     }
23 /**
24  * 对指定目录中的内容i进行深度遍历，并按照指定过滤器进行过滤
25  * 将过滤器的内容存储到指定容器List中
26  * @param dir
27  * @param filter
28  * @param list
29  */
30     public static void getFiles(File dir, FilenameFilter filter, List<File> list) {
31         File[] files = dir.listFiles();
32         for (File file : files) {
33             if (file.isDirectory()) {
34                 // 递归查找文件目录
35                 getFiles(file, filter, list);
36             } else {
37                 // 对遍历到得文件进行过滤器的过滤，将符合条件File对象存储到List集合中
38                 if (filter.accept(dir, file.getName())) {
39                     list.add(file);
40                 }
41             }
42         }
43     }
44     //将List集合存入到文件中
45     public static void writeToFile(List<File> list, File destFile) {
46         BufferedWriter bufx = null;
47         try {
48             bufx = new BufferedWriter(new FileWriter(destFile));
49             for (File file : list) {
50                 bufx.write(file.getAbsolutePath());
51                 bufx.newLine();
52                 bufx.flush();
53             }
54         } catch (IOException e) {
55             // TODO Auto-generated catch block
56             throw new RuntimeException("写入失败");
57         } finally {
58             if (bufx != null) {
59                 try {
60                     bufx.close();
61                 } catch (IOException e) {
62                     // TODO Auto-generated catch block
63                     throw new RuntimeException("关闭失败");
64                 }
65             }
66         }
67     }
68 
69 }
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posted on 2013-12-09 00:14 ざ柒阅读(207) 评论(0) 收藏举报