Summary of several methods for page Jump in jsp and servlet

The following methods can be used to redirect pages in JSP and Servlet:

Assume that you want to jump from test1.jsp to test2.jsp.

1. Jump in JSP:

1. Use the requestdispatcher. Forward Method for forwarding

<%
Requestdispatcher RD = getservletcontext (). getrequestdispatcher ("/test/test2.jsp ");

Rd. Forward (request, response );
%>

2. response. sendredirect redirection

<%
Response. sendredirect ("test2.jsp ");
%>

3. Use the forward label

<JSP: Forward page = "test2.jsp"/>

4. meta tag in HTML Tag

<Meta http-equiv = "refresh" content = "0; url = test2.jsp">

5. Use response. setheader

<%
Int staytime = 0;
String url = "test2.jsp ";
String content = staytime + "; url =" + URL;
Response. setheader ("refresh", content );
%>

6. Use response. setHeader and response. setStatus to send redirect requests

<%
Response. setStatus (HttpServletResponse. SC _MOVED_PERMANENTLY );
String newLocation = "test2.jsp ";
Response. setHeader ("Location", newLocation );
%>

7. Use javascript scripts

<Script type = "text/javascript">
Window. location. href = "test2.jsp ";
</Script>

Ii. redirection in servlet:

Assume that you are redirected to test2.jsp from the servlet.

1. forward

ServletContext SC = getServletContext ();
RequestDispatcher rd = SC. getRequestDispatcher ("/test/test2.jsp"); // targeted page
Rd. forward (request, response );

 

Public class ForwardServlet extends HttpServlet {

Public void doGet (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {

String id = request. getParameter ("id ");
Response. setContentType ("text/html; charset = gb2312 ");
ServletContext SC = getServletContext ();
RequestDispatcher rd = SC. getRequestDispatcher ("/test/test2.jsp"); // targeted page
Rd. forward (request, response );
}

Public void doPost (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {
DoGet (request, response );
}

}

 

2. sendRedirect

 

Package com. yanek. test;

Import java. io. IOException;

Import javax. servlet. RequestDispatcher;
Import javax. servlet. ServletContext;
Import javax. servlet. ServletException;
Import javax. servlet. http. HttpServlet;
Import javax. servlet. http. HttpServletRequest;
Import javax. servlet. http. HttpServletResponse;

Public class RedirectServlet extends HttpServlet {

Public void doGet (HttpServletRequest request, HttpServletResponse response)
Throws ServletException, IOException {

String id = request. getParameter ("id ");
Response. setContentType ("text/html; charset = gb2312 ");
Response. sendRedirect ("test/test2.jsp ");
}

Public void doPost (HttpServletRequest request, HttpServletResponse response)
Throws servletexception, ioexception {
Doget (request, response );
}

}