加载 properties 的几种方法

1.通过Resources 拿（放在resources文件夹）

1 Properties p = new Properties();
2 
3 p = Resources.getResourceAsProperties("jdbc.properties");

2.

通过流 来拿   p.load(in);

InputStream in = Thread.currentThread()
                            .getContextClassLoader()
                            .getResourceAsStream("jdbc.properties");
            p.load(in);

 2.2  FIleInuptStresm

//InputStream in =  new  FileInputStream("jdbc.properties");//不行
		InputStream in =  new  FileInputStream("resources/jdbc.properties");//行
		p.load(in);

　2.3

源码

 1 package com.seehope._03_util;
 2 
 3 import java.io.FileInputStream;
 4 import java.io.InputStream;
 5 import java.util.Properties;
 6 
 7 public class PropertiesDemo {
 8     public static void main(String[] args) throws Exception{
 9         Properties p = new Properties();
10         
11         /*1.通过流来拿，那应该会指定一个路径
12         InputStream in = Thread.currentThread().getContextClassLoader().getResourceAsStream("jdbc.properties");
13         p.load(in);
14         */
15         
16         /* 2.
17         //InputStream in =  new  FileInputStream("jdbc.properties");//不行
18         InputStream in =  new  FileInputStream("resources/jdbc.properties");// 行
19         p.load(in);
20         */
21         InputStream in = PropertiesDemo.class
22                 .getClassLoader().
23                 getResourceAsStream("test/jdbc.properties");
24         //scr 文件夹下面的 test 包下的 jdbc.properties
25         p.load(in);
26         
27         
28         String  className = p.getProperty("DriverClassName");
29         System.out.println(className);
30         String url = p.getProperty("url");
31         System.out.println(url);
32     }
33     
34 }

　　

输出

1 com.mysql.jdbc.Driver
2 jdbc:mysql://localhost:3306/jdbc

更多参见   https://blog.csdn.net/u013301376/article/details/78341914