javaee Properties键值对写入和读取方法

package Zjshuchu;

import java.util.Properties;
import java.util.Set;

public class Demo03 {

    public static void main(String[] args) {
        Properties pro=new Properties();
        //设置添加值setProperty
        pro.setProperty("a", "1");
        pro.setProperty("b", "2");
        pro.setProperty("c", "3");
        pro.setProperty("d", "4");
        //取值getProperty
        String a=pro.getProperty("a");
        System.out.println(a);
        //遍历取值,先建立一个泛型
        Set<String> set=pro.stringPropertyNames();
        for(String s:set){
            String key=s;
            String value=pro.getProperty(s);
            System.out.println(key+"..."+value);
        }

    }

}