servlet中用HttpServletRequest对象获取一些路径和信息

System.out.println(request.getSession().getServletContext().getRealPath(""));
//项目在服务器的路径
  System.out.println(request.getRequestURL());
//页面访问地址
  System.out.println(request.getContextPath());
//项目名路径
  System.out.println(request.getMethod());
//请求方法
  System.out.println(request.getLocalPort());
//端口号
  System.out.println(request.getRequestURI());
//相对路径
  System.out.println(request.getServletPath());
//项目中请求路径
  System.out.println(request.getServerPort());
//服务器端口号
  System.out.println(request.getServerName());
//网站域名
  System.out.println(request.getScheme());

//请求协议
  System.out.println(System.getProperty("user.dir"));

//得到工程路径

输出结果：
D:\Users\Administrator\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Spring3MVC
http://localhost:8081/Spring3MVC/test3/login
/Spring3MVC

GET

8081

/Spring3MVC/test3/login

/test3/login

8081

localhost

http

C:\Users\Administrator\Desktop\eclipse-jee-indigo-SR2-win32