Java获取项目中路径方法

Java获取项目中路径方法
假设项目结构如下：

D:\workspace\maven-web-project\target\maven-web-project\
|-WEB-INF\
  |-classes\
    |-pack\
      |-Test.class
    |-config.properties

class Test {
    static {
        /*在Test类中获取路径*/
        // 打印 file:/D:/workspace/maven-web-project/target/maven-web-project/WEB-INF/classes/
        System.out.println(Test.class.getClassLoader().getResource(""));
        // 打印 file:/D:/workspace/maven-web-project/target/maven-web-project/WEB-INF/classes/
        System.out.println(Test.class.getClassLoader().getResource("/"));
        // 打印 file:/D:/workspace/maven-web-project/target/maven-web-project/WEB-INF/classes/pack/
        System.out.println(Test.class.getResource(""));
        // 打印 file:/D:/workspace/maven-web-project/target/maven-web-project/WEB-INF/classes/
        System.out.println(Test.class.getResource("/"));
        // 打印 D:\App\apache-tomcat-7.0.69\bin
        System.out.println(new File("").getAbsolutePath());
        // 打印 D:\
        System.out.println(new File("/").getAbsolutePath());
        // 打印 null
        System.out.println(Thread.currentThread().getClass().getResource(""));
        // 打印 file:/D:/App/apache-tomcat-7.0.69/lib/
        System.out.println(Thread.currentThread().getClass().getResource("/"));
        // 打印 file:/D:/App/apache-tomcat-7.0.69/lib/
        System.out.println(Thread.currentThread().getClass().getClassLoader().getResource(""));
        // 打印null
        System.out.println(Thread.currentThread().getClass().getClassLoader().getResource("/"));
    }
}

总结：
获取classpath的方法

Test.class.getClassLoader().getResource("")
Test.class.getResource("/")