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1. //java°´Îļþ´óС¡¢Ãû³Æ¡¢ÈÕÆÚÅÅÐò
4. //java°´Îļþ´óС¡¢Ãû³Æ¡¢ÈÕÆÚÅÅÐò·½·¨
5. import java.io.*;
6. import java.util.*;
7. public class FileOrder{
8. //°´ÕÕÎļþ´óСÅÅÐò
9. public static void orderByLength(String fliePath) {
10. List< File> files = Arrays.asList(new File(fliePath).listFiles());
11. Collections.sort(files, new Comparator< File>() {
12. public int compare(File f1, File f2) {
13. long diff = f1.length() - f2.length();
14. if (diff > 0)
15. return 1;
16. else if (diff == 0)
17. return 0;
18. else
19. return -1;
20. }
21. public boolean equals(Object obj) {
22. return true;
23. }
24. });
25. for (File f : files) {
26. if(f.isDirectory()) continue;
27. System.out.println(f.getName()+":"+f.length());
28. }
29. }
30. //°´ÕÕÎļþÃû³ÆÅÅÐò
31. public static void orderByName(String fliePath) {
32. List files = Arrays.asList(new File(fliePath).listFiles());
33. Collections.sort(files, new Comparator< File>() {
34. @Override
35. public int compare(File o1, File o2) {
36. if (o1.isDirectory() && o2.isFile())
37. return -1;
38. if (o1.isFile() && o2.isDirectory())
39. return 1;
40. return o1.getName().compareTo(o2.getName());
41. }
42. });
43. for (File f : files) {
44. System.out.println(f.getName());
45. }
46. }
47. //°´ÈÕÆÚÅÅÐò
48. public static void orderByDate(String fliePath) {
49. File file = new File(fliePath);
50. File[] fs = file.listFiles();
51. Arrays.sort(fs,new Comparator< File>(){
52. public int compare(File f1, File f2) {
53. long diff = f1.lastModified() - f2.lastModified();
54. if (diff > 0)
55. return 1;
56. else if (diff == 0)
57. return 0;
58. else
59. return -1;
60. }
61. public boolean equals(Object obj) {
62. return true;
63. }
65. });
66. for (int i = fs.length-1; i >-1; i--) {
67. System.out.println(fs[i].getName());
68. System.out.println(new Date(fs[i].lastModified()));
69. }
70. }
71. public static void main(String args[]){
72. // orderByLength("c:/java");
73. // orderByName("c:/java");
74. orderByDate("c:/java");
75. }
76. }