HttpServletRequest httpRequest=(HttpServletRequest)request;  
String strBackUrl = "http://" + request.getServerName() //服务器地址  
                    + ":"   
                    + request.getServerPort()           //端口号  
                    + request.getContextPath()      //项目名称  
                    + request.getServletPath()      //请求页面或其他地址  
                + "?" + (request.getQueryString()); //参数 

转自： (http://blog.csdn.net/del1214/article/details/6538189)

Java中获得完整的URl字符串HttpServletRequest httpRequest=(HttpServletRequest)request; String strBackUrl = "http://" + request.getServerName() //服务器地址 + ":" + request import java .io.UnsupportedEncodingException; import java .net. URL Decoder; import java .util.HashMap; import java .util.Map; import java x.servlet.http.HttpServlet Request ; * <p> java 获 取 request 中 的参数、ja