package a.one;

import java.io.FileInputStream;

import java.io.InputStream;

import java.util.Properties;

public class Test1 {

/*    private static String driver;

    private static String url;

    private static String user;

    private static String password;*/

    //利用反射加载properties文件

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

        //

        Properties p=new Properties();

        FileInputStream in=new FileInputStream("config/c.properties");

        p.load(in);

        System.out.println(p);

        System.out.println("name:"+p.getProperty("name"));

        System.out.println("============使用类加载器加载properties文件=============");

        InputStream in2=Test1.class.getClassLoader().getResourceAsStream("db.properties");

        Properties p2=new Properties();

        p2.load(in2);

        System.out.println(p2);

        System.out.println("password:"+p2.getProperty("password"));

        System.out.println("============直接用类文件加载，其实里面就是封装了getClassLoader()方法==============");

        InputStream in3=Test1.class.getResourceAsStream("/db.properties");

        Properties p3=new Properties();

        p3.load(in3);

        System.out.println(p3);

        System.out.println("user:"+p3.getProperty("user"));

    }

}

 driver=com.mysql.jdbc.Driver

 url=jdbc:mysql://localhost:3306/mydb3

 user=root

 password=123456

{age=30, name=taeyeon, song=four seasons}

name:taeyeon

============使用类加载器加载properties文件=============

{user=root, password=123456, url=jdbc:mysql://localhost:3306/mydb3, driver=com.mysql.jdbc.Driver}

password:123456

============直接用类文件加载，其实里面就是封装了getClassLoader()方法==============

{user=root, password=123456, url=jdbc:mysql://localhost:3306/mydb3, driver=com.mysql.jdbc.Driver}

user:root