java读取html并替换相关内容

import java.io.*;
/**
* Created by IntelliJ IDEA.
* User: zl420226
* Date: 2010-4-10
* Time: 13:58:23
* To change this template use File | Settings | File Templates.
*/
public class ReplaceText {
public static void main(String[] args)
{try {
BufferedReader buff = new BufferedReader(
new InputStreamReader(System.in));
System.out.print("Source Folder path:");
System.out.flush();
String folderPath = buff.readLine();
BufferedReader buffTarget = new BufferedReader(
new InputStreamReader(System.in));
System.out.print("target Folder path:");
System.out.flush();
String targetFolder = buffTarget.readLine();
BufferedReader buffSourceText = new BufferedReader(
new InputStreamReader(System.in));
System.out.print("The content you will replace:");
System.out.flush();
String source = buffSourceText.readLine();
BufferedReader buffTargetText = new BufferedReader(
new InputStreamReader(System.in));
System.out.print("replace as:");
System.out.flush();
String target = buffTargetText.readLine();
File file = new File(folderPath);
if(file.isDirectory()) {
String[] filelist = file.list();
for (int i = 0; i < filelist.length; i++) {
{
BufferedReader bf = new BufferedReader(new FileReader(folderPath+"\\"+filelist[i]));
BufferedWriter bw = new BufferedWriter(new FileWriter(targetFolder+"\\"+filelist[i]));
String s = null;
while( (s = bf.readLine()) != null) {
s = s.replaceAll(source,target);
bw.write(s);
bw.newLine();
bw.flus