获取当前url

 <%  
        String url=request.getScheme()+"://";   
        url+=request.getHeader("host");   
        url+=request.getRequestURI();   
        if(request.getQueryString()!=null)   
        url+="?"+request.getQueryString();   
        out.println(url);  
 
    %>  
<%  
    String  realPath1  =  "http://"  +  request.getServerName()  +  ":"  +  request.getServerPort()  +  request.getContextPath()+request.getServletPath().substring(0,request.getServletPath().lastIndexOf("/")+1);    
    String  realPath2  =  "http://"  +  request.getServerName()  +  ":"  +  request.getServerPort()  +  request.getContextPath()+request.getServletPath();  
    out.println("web  URL  路径1:"+realPath1);  
    out.println("web  URL  路径2:"+realPath2);  
%>