java 过滤器获取URL区别

假定你的web application 名称为CardHolderWeb,你在浏览器中输入请求路径：

http://localhost:8080/CardHolderWeb/memberCardManagement/init.action

则执行下面向行代码后打印出如下结果：

1、 System.out.println(request.getContextPath());

打印结果：/CardHolderWeb

2、System.out.println(request.getServletPath());

打印结果：/memberCardManagement/init.action

3、 System.out.println(request.getRequestURI());

打印结果：/CardHolderWeb/memberCardManagement/init.action

4、System.out.println(request.getRequestURL());

打印结果：http://localhost:8080/CardHolderWeb/memberCardManagement/init.action

5、 System.out.println(request.getRealPath("/"));

打印结果：发布到项目的目录