Java 获取当前页面完整的url

HttpServletRequest httpRequest=(HttpServletRequest)request;  

          

  

String strBackUrl = "http://" + request.getServerName() //服务器地址  

                      

+ ":"   

                      

+ request.getServerPort()//端口号  

                      

+ httpRequest.getContextPath()      //项目名称  

                     

 + httpRequest.getServletPath()      //请求页面或其他地址  

                 

 + "?" + (httpRequest.getQueryString()); //参数