JDBC 封装工具类 Properties集合演练 它是双列集合 可存取值

import java.util.Properties;

public class Test3 {
    public static void main(String[] args) {
        // 获得集合
        Properties properties = new Properties();
        // 存值
        properties.setProperty("age", "18");
        properties.setProperty("name", "pyhui");
        // 取值
        String name = properties.getProperty("name");
        String age = properties.getProperty("age");
        System.out.println(name);
        System.out.println(age);
    }
}