IO---替换文本内容

package ReaderAndWriter;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.nio.charset.MalformedInputException;
import java.util.Scanner;

public class ReaderAndWriter2 {
    public void ReaderAndWriter(String file1,String file2) {
        BufferedReader br = null;
        BufferedWriter bw = null;
        BufferedWriter bw1 = null;
        
        try {
            FileWriter fw1 = new FileWriter(file1);
            bw1 = new BufferedWriter(fw1);
            Scanner input = new Scanner(System.in);
            System.out.println("请输入你的名字:");
            String sr = input.next();
            String str = "我的名字叫:"+sr;
            bw1.write(str);
            bw1.flush();
            
            InputStreamReader isr = new InputStreamReader(new FileInputStream(file1),"GBK");
            FileWriter fw = new FileWriter(file2);
            
            br = new BufferedReader(isr);
            bw = new BufferedWriter(fw);
            
            
            String line = null;
            StringBuffer sbf = new StringBuffer();
            while((line = br.readLine())!=null) {
                
                sbf.append(line);
            }
            
            System.out.println("替换前："+sbf);
            String newString = sbf.toString().replace(sr,"男神");
            System.out.println("替换后："+newString);
            bw.write(newString);
            bw.flush();
            
            
        } catch (UnsupportedEncodingException | FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                bw.close();
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            
        }
        
        
    }
    public static void main(String[] args) {
        ReaderAndWriter2 rw = new ReaderAndWriter2();
        rw.ReaderAndWriter("d:/q.txt","d:/qq.txt");
    }
}