Servlet Video-Developing the first Java Web (simplest Java Web program)

Web projects have directory structure requirements

The web-info folder is a servlet specification that must be named

There are also directory structure requirements under Web-info, such as

Xml

The servlet is an interface with 5 methods that must be implemented

To implement the Java Web, you must implement these 5 methods destroy () Getservletconfig () Getservletinfo () init (servletconfig config) service (servletrequ EST req,servletresponse Res)

The following code is output to the browser window

1 ImportJavax.servlet.Servlet;2 ImportJavax.servlet.ServletConfig;3 Importjavax.servlet.ServletException;4 Importjavax.servlet.ServletRequest;5 ImportJavax.servlet.ServletResponse;6 Importjava.io.IOException;7 ImportJava.io.PrintWriter;8 9  Public classWelcomeservletImplementsServletTen { One      Public voidInit (servletconfig config)throwsservletexception A       { -          -     } the  -      Public voidService (ServletRequest request,servletresponse response)throwsservletexception,ioexception -     { -         +PrintWriter out=Response.getwriter (); -Out.print ("123123"); +     } A  at      Public voiddestroy () {} -      PublicString Getservletinfo () {return NULL;} -      PublicServletConfig Getservletconfig () {return NULL;} -      -}

Configuration XML

1 <?XML version= "1.0" encoding= "Iso-8859-1"?>2 <Web-appxmlns= "Http://xmlns.jcp.org/xml/ns/javaee"3 Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"4 xsi:schemalocation= "Http://xmlns.jcp.org/xml/ns/javaee5 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd "6 version= "3.1">7 8 <servlet>9 <Servlet-name>Thisisservletname</Servlet-name>Ten <Servlet-class>Welcomeservlet</Servlet-class> One </servlet> A  - <servlet-mapping> - <Servlet-name>Thisisservletname</Servlet-name> the <Url-pattern>/aaa</Url-pattern> - </servlet-mapping> -  - </Web-app>

Servlet Video-Developing the first Java Web (simplest Java Web program)