0308作业

主代码

package com.kgc.zuoye.zy0308.zy01;

import java.io.*;

//替换文本文件内容
public class Test {
    public static void main(String[] args) {
        BufferedReader br = null;
        BufferedWriter bw = null;
        try {
            br = new BufferedReader(new FileReader("c:\\kkk\\pet.txt"));
            String str = br.readLine();
            System.out.println("替换前:" + str);

            String str2 = str.replace("{name}", "欣欣").replace("{type}", "狗狗").replace("{master}", "张三");
            System.out.println("替换后:"+str2);
            bw = new BufferedWriter(new FileWriter("c:\\kkk\\pet.txt"));
            bw.write(str);
            bw.newLine();
            bw.write(str2);
            bw.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (bw != null) {
                    bw.close();
                }
                if (br != null) {
                    br.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }
}

 

 

 

 

 

运行结果