java中替换文件内容

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package jbit.io;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class ReaderAndWriterFile { public void replaceFile(String file1,String file2) {      BufferedReader reader = null;           BufferedWriter writer = null; try {//创建 FileReader对象和FileWriter对象.FileReader fr  = new FileReader(file1);  FileWriter fw = new FileWriter(file2);            //创建 输入、输入出流对象.            reader = new BufferedReader(fr);            writer = new BufferedWriter(fw);            String line = null;            StringBuffer sbf=new StringBuffer();              //循环读取并追加字符            while ((line = reader.readLine()) != null) {                sbf.append(line);              }            System.out.println("替换前："+sbf);            /*替换内容*/            String newString=sbf.toString().replace("{name}", "欧欧");            newString = newString.replace("{type}", "狗狗");            newString = newString.replace("{master}", "李伟");            System.out.println("替换后："+newString);            writer.write(newString);  //写入文件               } catch (IOException e) {            e.printStackTrace();        }finally{        //关闭 reader 和 writer.try {if(reader!=null)reader.close();if(writer!=null)writer.close();} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {ReaderAndWriterFile obj = new ReaderAndWriterFile();        obj.replaceFile("c:\\pet.template", "D:\\myDoc\\pet.txt");          }}
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