java工程的途径备忘录

java工程的路径备忘录
String path = this.getClass().getResource("").getPath();
System.out.println(path);
String path2 = this.getClass().getClassLoader().getResource("").getPath();
System.out.println(path2);
String path3 = System.getProperty("user.dir");
System.out.println(path3);