Difference between sendRedirect, include, forward

1. sendRedirect

• response.sendRedirect();
• Server follow the logic, send a link to browser and browser will invoke the link with previous session, request again; The request.setAttribute can’t use.

2. include:

• Will show the content of current page and included page, and the address link not change. And the reques.setAttribute can use
• Servlet: request.getRequestDispatcher(“jsp2.jsp”).include(request, response);
• JSP: <jsp:include page=”include.jsp”/>

3. forward:

• Will show the content of forward page, and the address link not change. And the reques.setAttribute can use
• Servlet: request.getRequestDispatcher(“jsp2.jsp”).forward(request, response);
• JSP: <jsp:forward page=”include.jsp” />