package Zy;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.Properties;

import java.util.Set;

/*2.用代码实现以下需求：

(1)已知配置文件config.properties中有三个键值对

        name=zhangsan

        score=80

        address=beijing

(2)使用IO字节流对象和Properties类结合使用,将配置文件中的score键的值修改为100*/

public class Zy02 {

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

        Properties pro=new Properties();

        FileInputStream fis=new FileInputStream("d:\\java\\config.properties");

        pro.load(fis);

        Set<String> str=pro.stringPropertyNames();

        for(String s:str){

            if(s.equals("score")){

                pro.setProperty(s, "100");

            }else{

                pro.setProperty(s, pro.getProperty(s));

            }

            System.out.println(s+"..."+pro.getProperty(s));

            FileOutputStream fos=new FileOutputStream("d:\\java\\config.properties");

            pro.store(fos, "message");

            fos.close();

    }

    }

}