Java类使用类装载器实现装载文件

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view plainprint?package com.bird.dao;

import java.io.FileInputStream;import java.io.InputStream;import java.util.Properties;

import org.junit.Test;

/*** @use Java普通类实现装载配置文件* @author Bird**/public class UserDao {

@Test//无法实现动态修改后呈现，因为直接装载到内存中是不会随着磁盘的文件的更改而更改的 public void update() throws Exception{ InputStream in = UserDao.class.getClassLoader().getResourceAsStream(“db.properties”);//得到当前类装载器装载配置文件 Properties pro = new Properties(); pro.load(in);

String url = pro.getProperty(“url”); String username = pro.getProperty(“username”); String password = pro.getProperty(“password”);

System.out.println(url); System.out.println(username); System.out.println(password); }

@Test//可以时时的获得更改后的数据 public void test() throws Exception{ String path = UserDao.class.getClassLoader().getResource(“db.properties”).getPath(); FileInputStream in = new FileInputStream(path); Properties pro = new Properties(); pro.load(in); String url = pro.getProperty(“url”); String username = pro.getProperty(“username”); String password = pro.getProperty(“password”);

System.out.println(url); System.out.println(username); System.out.println(password); }}