常用类库IO之Properties

public class Demo_properties {
    public static void main(String[] args) throws IOException {
        //Properties是Hashtable的子类（即Map的子类）
        //写数据
        /*Properties ppt = new Properties();
        ppt.put("name","金苹果");
        ppt.put("info","讲述了苹果种植的过程");
        FileWriter fw = new FileWriter("D:/book.properties");
        ppt.store(fw,"存储的图书");
        fw.close();*/
        //读取数据
        Properties ppt = new Properties();
        FileReader r = new FileReader("D:/book.properties");
        ppt.load(r);
        System.out.println(ppt.get("name"));
        //getProperty（）是Properties类特有的，和get（）功能一样
        System.out.println(ppt.getProperty("info"));
    }
}