方式一:
InputStream in = Test.class
.getResourceAsStream("/env.properties");
URL url = Test.class.getResource("env.properties") ;
说明：env.properties文件在src的根目录下，文件名前有斜杠
方式二:
InputStream in = Test.class.getClassLoader()
.getResourceAsStream("env.properties");
URL url = Test.class.getClassLoader().getResource("env.properties") ;
方式三：
InputStream in = Thread.currentThread().getContextClassLoader()
.getResourceAsStream("ExcelModeMappingl.xml");
原贴地址:https://yq.aliyun.com/articles/40852