How to call to a servlet from jsp without scriptles?

Question

I am new to jsp and I have created jsp page to search something. I have written servlet as well. But I don't know hot to make the interaction between those.

My web.xml looks like

<servlet>
    <servlet-name>HotelSearch</servlet-name>
    <servlet-class>it.testproject.HotelSearch</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>HotelSearch</servlet-name>
    <url-pattern>/HotelSearch</url-pattern>
</servlet-mapping>

My servlet name is HotelSearch.java and Search page is Default.jsp and I want to redirect to SearchResults.jsp after the servlet call.

Can anyone expalain me how to do this.Thanks in advance.

Answer 1

step 1: load default.jsp i guess you have a form to submit the search query like

  <form method="post" action="HotelSearch">
  //action is your url pattern and method is your choice get or post
    // your text box
   </form>

step 2: Now perform your business logic for search in your servlet then put your result data in request

 req.setAttribute("key",value); //value is object

 dispatch your request with data to `SearchResults.jsp` 
 req.getRequestDispatcher("SearchResults.jsp").forward(req,resp);

step 3: display data in SearchResults.jsp using req.getAttribute("key")

Tip

Best way is to configure jsp file in web.xml

<servlet>
      <servlet-name>myjsp</servlet-name>
      <jsp-file>jsp/SearchResults.jsp</jsp-file>
 </servlet>
 <servlet-mapping>
      <servlet-name>myjsp</servlet-name>
      <url-pattern>/jsp_url</url-pattern>
 </servlet-mapping>

Now you can use

req.getRequestDispatcher("jsp_url").forward(req,resp);

Answer 2

So you would want to:

1. Use form to send data to servlet from first jsp:

   <form action="servlet_url"> <input type="submit" ... > </form>

2. Redirect from servlet to second jsp:

   (HttpServletResponse)response.sendRedirect("jsp_url");

Answer 3

On the Client

Make sure your tag has the action set correctly:

<c:set var="ctx" value="${pageContext.request.contextPath}"/>
<FORM action="${ctx}/HotelSearch">
    <input type="text" name="queryString">
</FORM>

In the Servlet

response.sendRedirect(request.getContextPath() + "/SearchResults.jsp");