Java IO Operations Scan local files and delete portions of some of these files

Mainly the front-end time computer in the VBS virus, although anti-virus, but for the HTML file, there are still a lot of new content

<script language=vbscript><!--
Dropfilename = "Svchost.exe"
WriteData = " 4d5a90000300000004000000ffff0000b8000000000000004000000000000000000000000000000000000000000000000000000000000000000000000 0010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000 ... omit after

So I wrote a scan of all the HTML files in the target directory and <script language=vbscript><!--
Dropfilename = "Svchost.exe" as a flag, the text is processed, delete the HTML file in the above Code section of code.

Direct Code Bar (for the C-drive section of the directory without access to the access, but this type of file is generally not the existence of infected HTML files)
Package gwdevelop;

Import Java.io.BufferedReader;
Import Java.io.BufferedWriter;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import Java.io.FileWriter;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import Java.io.OutputStreamWriter;
Import Java.util.HashSet;
Import Java.util.Set;

Import Org.apache.catalina.tribes.membership.StaticMember;

public class Tool_deletetxt {

public static void Main (string[] args) {
String filepath= "d://new Folder";//Read D-drive
String fileendwith= ". html";//Read the. html file
set<string> fileset = new hashset<> ();//Save HTML file list
String out= "";
try {
ReadFile (Filepath,fileendwith,fileset); Read the HTML file under D and put the path into Fileset
for (String String:fileset) {
Out=changecharacter (String, "////", "////////");//Convert directory string form, translate/convert//
try {
String a = FileRead (out); Reads the contents of the file out and saves it in a string
string[] PPP = A.split ("<script language=vbscript>");//The HTML file containing the VBS infection is judged by this flag and the contents of the previous normal file are intercepted
Clearinfoforfile (out); Empty file contents
WriteStringToFile2 (Out,ppp[0]); Re-write the previous normal file contents to the file
} catch (Exception e) {
E.printstacktrace ();
}
}
} catch (FileNotFoundException e) {
E.printstacktrace ();
} catch (IOException e) {
E.printstacktrace ();
}
}
Read all HTML files under a folder
public static Boolean ReadFile (String filepath,string fileendwith,set<string> Set) throws FileNotFoundException, IOException {

try {
File File = new file (filepath);
if (!file.isdirectory () &&file.getabsolutepath (). EndsWith (Fileendwith)) {
Set.add (File.getabsolutepath ());

} else if (File.isdirectory ()) {
string[] filelist = File.list ();
if (null = = FileList) {
System.out.println (File.getpath () + "file read failed in directory");
return true;
}
if (filelist.length>0) {
for (int i = 0; i < filelist.length; i++) {
File ReadFile = new file (filepath + "\ \" + filelist[i]);
if (!readfile.isdirectory () && Readfile.getabsolutepath (). EndsWith (Fileendwith)) {
Set.add (Readfile.getabsolutepath ());
} else if (Readfile.isdirectory ()) {
ReadFile (filepath + "\" + Filelist[i],fileendwith,set);
}
}
}
}
} catch (FileNotFoundException e) {
SYSTEM.OUT.PRINTLN (filepath);
System.out.println ("ReadFile () Exception:" + e.getmessage ());
}
return true;
}

/**
* String processing, will/change \ \, read directory use
**/
public static string Changecharacter (string instring,string a,string b) {
String outstring;
outstring = Instring.replaceall (A, b);
return outstring;
}

Read File contents
public static string FileRead (String string) throws Exception {
FileInputStream file = new FileInputStream (string);//define a file object to initialize the FileReader
InputStreamReader reader = new InputStreamReader (file, "UTF-8");//define a FileReader object to initialize the BufferedReader
BufferedReader breader = new BufferedReader (reader),//new a BufferedReader object, reads the contents of the file into the cache
StringBuilder sb = new StringBuilder ();//define a string cache and store the string in the cache
String s = "";
while ((S =breader.readline ()) = null) {//Line reads the contents of the file, does not read the line break and the trailing space
Sb.append (s + "\ n");//Adds a newline character to the read string and stores it in the cache
}
Breader.close ();
String str = sb.tostring ();
return str;
}

Empty existing file contents
public static void Clearinfoforfile (String fileName) {
File file =new file (fileName);
System.out.println ("Empty file:" +filename);
try {
if (!file.exists ()) {
File.createnewfile ();
}
FileWriter FileWriter =new FileWriter (file);
Filewriter.write ("");
Filewriter.flush ();
Filewriter.close ();
} catch (IOException e) {
E.printstacktrace ();
}
}

Write Normal file contents
public static void WriteStringToFile2 (String filepath,string content) {
try {
System.out.println ("Re-write File:" +filepath);
FileOutputStream file = new FileOutputStream (FilePath);
OutputStreamWriter writer = new OutputStreamWriter (file, "UTF-8");
BufferedWriter bw = new BufferedWriter (writer);
Bw.write (content);//Add a string to an existing file
Bw.close ();
Writer.close ();
} catch (Exception e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}
}

Java IO Operations Scan local files and delete portions of some of these files