通過類加載器獲取已知文件名的路徑

通過文件名獲得路徑和絕度路徑

public class ClassloderGetpath {
    public static void main(String[] args) throws IOException {
        //創建properties
        Properties pro = new Properties();

        //通過src下的文件名獲取絕對路徑
        URL resource = InputStreamDemo.class.getClassLoader().getResource("prop.properties");
        String path = resource.getPath();
        System.out.println(path);

        //使用類加載器獲得輸入流
        InputStream resourceAsStream = ClassloderGetpath.class.getClassLoader().getResourceAsStream("abcd.properties");
        //將類加載
        pro.load(resourceAsStream);
        //獲取鍵值對
        String username = pro.getProperty("username");

        System.out.println(username);
    }
}