java读取html并替换相关内容-优快云博客

本文介绍了一个简单的Java程序，用于批量替换指定文件夹内所有文件中的特定文本。程序接收源文件夹路径、目标文件夹路径、要替换的内容及替换成的内容作为输入，并完成文件内容的替换。

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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.flush(); } bw.close(); } } } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }

网络摘录：

知道你有无注意到,JDK中的String的ReplaceAll方法支持的是正则表达式,在你的参数中可能出现正则表达式转义符的情况下,很可能得到意想不到的结果.所以做一个自己的ReplaceAll方法还是一个很有必要的工作.

public static String replaceAll(String src, String fnd, String rep) { int pos = 0; int prepos = 0; int fndlen = fnd.length(); String newstr = ""; pos = src.indexOf(fnd, pos); while (pos >= 0) { newstr += src.substring(prepos, pos); newstr += rep; prepos = pos + fndlen; pos = src.indexOf(fnd, pos + fndlen); } newstr += src.substring(prepos); return newstr; }