The difference between ForWord and Sendredirect in JSP

js|redirect|word| difference

1.requestdispatcher.forward ()

is on the server side, when using forward (), the Servlet engine passes HTTP requests from the current servlet or JSP to another servlet,jsp or normal HTML file, or your form commits to a.jsp, The forward () redirect to b.jsp is used in a.jsp, where all the information submitted by form is available in b.jsp and the parameters are automatically passed.

However, forward () cannot be redirected to a JSP file with a frame, which can be redirected to an HTML file with a frame, while forward () cannot be passed back with parameters such as Servlet?name=frank, which is not possible. You can pass Response.setattribute ("name", name) to the next page within your program.

The browser address bar URL does not change after redirection.

Example: redirection in servlet files
CODE

public void DoPost (httpservletrequest request,httpservletresponse response)

Throws Servletexception,ioexception

{

Response.setcontenttype ("text/html; charset=gb2312 ");

ServletContext sc = Getservletcontext ();

RequestDispatcher rd = null;

RD = Sc.getrequestdispatcher ("/index.jsp");

Rd.forward (request, response);
}

2.response.sendredirect ()

is working on the user's browser side, Sendredirect () can be passed with parameters, such as Servlet?name=frank to the next page, and it can be redirected to different hosts, and the URL of the redirected page appears on the browser's address bar.

Sendredirect () can redirect the JSP file with frame.

Example: redirection in servlet files
CODE

public void DoPost (httpservletrequest request,httpservletresponse response)

Throws Servletexception,ioexception

{

Response.setcontenttype ("text/html; charset=gb2312 ");

Response.sendredirect ("/index.jsp");

}