head first servlets and jsp pdf

shown below (click to view larger image):Click on the network, you can observe a header named Loction, the content is exactly the URL we redirect, then if the servlet code is changed to "Resp.setheader (" Location "," http://www.cnblogs.com/xkxf/"); Can I implement redirection? The answer is no, but add the words "resp.setstatus (302);" It is possible to achieve this effect.7. Finally, what does Sendredirect ("another URL") mean? The explanation in the book is that you want the browser to proce

-class>Com.example.web.JarDownloadServlet-class> servlet> servlet-mapping> Servlet-name>TestServlet-name> Url-pattern>/jardownload.doUrl-pattern> servlet-mapping>Web-app>4. Prepare a test jar package and place it in D:\APACHE-TOMCAT-7.0.77\WEBAPPS\JARDOWNLOAD-V15. Write a servlet with full name com.example.web.JarDownload, compile it into a. class file and deploy to D:\apache-tomcat-7.0.77\webapps\JarDownload-v1\ Web-inf\classes\com\example\web PackageCom.example.web;Impor

). 　　 　　 What are the implied objects (Implicity object) in the JSP page? What are their respective types and functions? 　　 Request-- Reponse-- Session-- Application-- Out-- Page-- PageContext-- Exception-valid only if the current JSP page is the error page. Config-- 　　 　　 What is the difference between the 　　 　　 　　 servlets/

First of all, spit groove yourself, old remember the wrong spelling of the word servlets ~ ~ ~At head first Servlets jsp, I felt the fascination of head first (multi-image, one-page-less, this is head).What did the 1.WEB server do

use the XML Deployment profile (DD) to configure security without having to hard-code it into the Servlet class code.5.JSP support: Responsible for translating JSP code into real java.P.S: How does a container handle a request? P42A city servlet can have 3 names1. URL name that the customer knows2. The password internal name that the Deployer knows3. The actual fully qualified nameEstablishing a mapping of

safety, servlet Lifecycle management, JSP support and logging, and so on. We don't need to write anymore, we just need to call the method.The process of distributing the request is as follows, although I don't think I need it.Mapping of 2.2 servletHow did Tomcat find the servlet?You can use XML attribute mappings to findServlet file path name under Web-inf's classes, the generic servlet has 3 names URL name The secret internal name, whic

Chapter OutlineThe difference between 1.servletConfig and ServletContextThe difference between 1.servletConfig and ServletContext From the deployment point of view, ServletConfig is in the servlet, and ServletContext is under Web-app From the code,Getservletcontext (). Getinitparameter ("foo"); Getservletconfig (). Getinitparameter ("foo") From a usable point of view, ServletConfig is available only to the corresponding servlet, while ServletContext is useful for all