Various methods of JSP page jump and request

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding= "Utf-8"%><! DOCTYPE html >${pagecontext.request.contextpath}style= "Cursor:pointer; width:50px; height:50px "> </a> <!--here is a server-side request with a tag, and the parameters are passed behind the link? Connect-<a href= "${pagecontext.request.contextpath}/jsppage/requestpage.ht?name=merida" > style= "Cursor:pointer; width:50px; height:50px "> </a> Form Action= "${pagecontext.request.contextpath}/jsppage/requestpage.ht" >Name:<input type= "text" name= "name" > <input type= "Submit"value= "Submit" > </form> Action= "${pagecontext.request.contextpath}/jsppage/requestpage.ht" >Name:<input type= "text" name= "name" > <a href= "#"onclick= "document.getElementById (' subform ')." Submit (); return false "> style= "Cursor:pointer;" > </a> </form> Action= "${pagecontext.request.contextpath}/jsppage/requestpage.ht" >Name:<input type= "text" name= "name" > <!--here is the role of the a tag is grafted to the IMG tag, and the same can be achieved when the form is submitted--style= "Cursor:pointer;"onclick= "document.getElementById (' Subform1 ')." Submit (); return false "> </a> </form> Request Forwarding: Request.getrequestdispatcher (URL address). Forward (request, response) Here is the use of the requested forwarding to request the server-<%--<%Request.setattribute ("Name", "GIANT"); /*request.getrequestdispatcher ("${pagecontext.request.contextpath}/jsppage.ht"). Forward (request, response);*/%>--%> /*here is the use of forwarding to jump the page on the client*/Request.getrequestdispatcher ("/jsppage/requestpage.jsp"). Forward (request, response); %>--%> <%--in a JSP page, you can use the <jsp:forward> tag to forward requests--%> <%--<jsp:forward page= "/JSPPAGE/REQUESTP Age.jsp ">--%></body>
 PackageResponseservlet;Importjava.io.IOException;Importjavax.servlet.ServletException;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse; Public classResponseservletextendsHttpServlet {@Overrideprotected voidService (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {//get the app name for the projectString path= "\ \" +Request.getservername (); if(! (Request.getparameter ("name") = =NULL) ) {String name=request.getparameter ("name"); Response.getwriter (). println ("The value obtained from the request parameter" +name); Response.sendredirect (Path+ "/jsppage/redirectpage.jsp"); }Else{String namestring= (String) request.getattribute ("name"); Response.getwriter (). println ("Get out of request scope" +namestring); Response.sendredirect (Path+ "/jsppage/redirectpage.jsp"); }    }}
<?XML version= "1.0" encoding= "UTF-8"?><Web-appXmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns= "Http://java.sun.com/xml/ns/javaee"Xmlns:web= "Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"ID= "webapp_id"version= "2.5">  <Display-name>Requestmethod</Display-name>  <welcome-file-list>    <Welcome-file>/jsppage/index.jsp</Welcome-file>  </welcome-file-list>  <servlet>  <Servlet-name>Pagerequest</Servlet-name>  <Servlet-class>Responseservlet.responseservlet</Servlet-class>  </servlet>  <servlet-mapping>  <Servlet-name>Pagerequest</Servlet-name>  <Url-pattern>*.ht</Url-pattern>  </servlet-mapping></Web-app>
Various methods of JSP page jump and request