0308作业

第一题：

package com.bd22;

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.io.Writer;

public class Pet {
    public static void main(String[] args) {
        InputStreamReader isr = null;
        BufferedReader br = null;
        Writer w = null;
        BufferedWriter bw = null;
        try {
            isr = new InputStreamReader(new FileInputStream("E:\\pet.txt"),"GBK");
            w = new FileWriter("E:\\newpet.txt");
            br = new BufferedReader(isr);
            StringBuffer sb = new StringBuffer();
            bw = new BufferedWriter(w);
            String str = null;
            while((str = br.readLine())!=null) {
                sb.append(str);
            }
            System.out.println("替换前："+sb);
            String a = sb.toString().replace("{name}", "是小白").toString().replace("{type}", "狗").toString().replace("{master}", "欣仔");
            bw.write(a);
            bw.flush();
            System.out.println("替换后："+a);
            
        } catch (UnsupportedEncodingException | FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                br.close();
                bw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

输出结果：