java处理文本文件中的乱码字符

java处理文本文件中的乱码字符
逐行读取文本文件，使用正则表达式替换其中出现的乱码，并将清除掉乱码的数据保存到新文件中

package com.yonyou.jekey;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
/*
 * 
 */
public class Replacelm {
	public static BufferedReader bufread;
	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		String input = args[0];
		String output = args[1];
		File outputf = creatTxtFile(output);
		String read, write;
		String regex = "[^\\p{Graph}\\s]";
		FileReader fileread;
		fileread = new FileReader(input);
		bufread = new BufferedReader(fileread);
		FileOutputStream fos = new FileOutputStream(outputf);
		PrintWriter pw = new PrintWriter(fos);
		while ((read = bufread.readLine()) != null) {
			write = read.replaceAll(regex, "")+"\r\n";
			pw.write(write.toCharArray());
		}
		pw.flush();
		pw.close();
		System.out.println("处理完成!");
		System.out.println("请查看文件:"+outputf.getAbsolutePath());
	}
	/**
	 * 创建文本文件.
	 * 
	 * @throws IOException
	 * 
	 */
	public static File creatTxtFile(String filename) throws IOException {
		File f = new File(filename);
		if (!f.exists()) {
			f.delete();
			f.createNewFile();
		}
		return f;
	}
}