idea 获取resources资源目录下文件

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以下格式都是正确的(注意：.properties文件中的第一行不要有空格！)：

        URL resource01 = MainMobile.class.getResource("");

        URL resource02 = MainMobile.class.getResource("/conf.properties");//success: resources下的

        InputStream ip3 = MainMobile.class.getClassLoader().getResourceAsStream("conf.properties");//success: resources下的

        InputStream resource32 = Thread.currentThread().getContextClassLoader().getResourceAsStream("conf.properties");

        InputStream ips =  MainMobile.class.getResourceAsStream("/conf.properties");//success: resources下的

        URL resource13 = Thread.currentThread().getContextClassLoader().getResource("conf.properties");

        InputStream resource43 = Thread.currentThread().getContextClassLoader().getResourceAsStream("conf.properties");

        InputStream resource23 = Thread.currentThread().getContextClassLoader().getResourceAsStream("conf.properties");