How to retrieve init parameter in jsp

Question

I try to get url data using jsp, for that i used jsp code as

  String Url = pageContext.getServletConfig().getInitParameter(\"url\").toString();
 out.println         


        

Answer 1

I think this will solve your issue.

Please restart your server after making changes to the web.xml file.

web.xml

    GetInitParam
    /GetInitParam.jsp
    
        url  
        hello  
    

  
    GetInitParam  
    /GetInitParam.jsp  
 

GetInitParam.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>



    
    


<%!
    String url= null;
    public void jspInit() { 
        ServletConfig config = getServletConfig(); 
        url= config.getInitParameter("url");
    }
%>
<%
    System.out.println(url);
%>

Update 1

As you asked in your comments to access parameters in all jsp files. to access parameters in your all jsp files you have to set in your web.xml

Put following lines in your web.xml

param1
hello

you can access this parameters in following way in your jsp file:

<% 
    String param1=application.getInitParameter("param1"); 
    System.out.println(param1);
%>

Update2

web.xml

param1
hello

JSP FILE

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>







<%
    String param1=application.getInitParameter("param1"); 
    System.out.println(param1);
%>