Java URI

// 获取 ClassLoader
ClassLoader cl = Person.class.getClassLoader();
Thread.currentThread().getContextClassLoader();
ClassLoader.getSystemClassLoader();

// 通过 classloader 去获取类路径下面的文件
// 协议://路径:端口/具体位置
// http://localhost:80/b/meinv.jpg
// ftp://localhost:22/ksjdksjdf/yeshou.jpg
// file:/d:/ksjdfksjdfk/qi.jpg
// jdbc:mariadb://localhost:3306/vip
URL resource = Person.class.getClassLoader().getResource("hibernate.cfg.xml");
System.out.println(resource);
InputStream resourceAsStream = cl.getResourceAsStream("hibernate.cfg.xml");
Enumeration<URL> resources = cl.getResources("hibernate.cfg.xml");
while (resources.hasMoreElements()) resources.nextElement();

// 留作作业
App.class.getResourceAsStream("hibernate.cfg.xml");
URL resource1 = Person.class.getResource("/hibernate.cfg.xml");
System.out.println(resource1);


// urn:
// isbn:82738283-23778272387