package com.cuit.suyang;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

public class Initial_ {

public static void main(String[] args) throws IOException {

InputStreamReader in = new InputStreamReader(new FileInputStream(new File("dir\\a.txt")));

int c;

StringBuilder string = new StringBuilder();

while((c = in.read()) != -1)

string.append((char)c);

System.out.println(string);

String _string = new String(string.toString()); //将StringBuilder 转换为 Stirng

_string = _string.replaceAll("336", "330");  //替换相应的字符

OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(new File("dir\\a.txt")));

out.write(_string); //写入原文件

out.flush();

out.close();

}

}