Shulou(Shulou.com)06/02 Report--

This article mainly explains "how to use Servlet". Friends who are interested might as well take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use Servlet.

The development environment needed to write Servlet

The basic environment required for Servlet development is JSDK and a Web server that supports Servlet.

1.JSDK (Java Servlet Development Kit)

JSDK contains the Java class libraries and related documentation needed to compile Servlet applications. For users developing with Java 1.1, JSDK must be installed. JSDK has been integrated into Java 1.2 Beta version, and if you develop with Java 1.2 or above, you do not need to install JSDK.

two。 Web server that supports Servlet

Servlet needs to run on a Web server that supports Servlet. Currently supports Servlet's Web server SUN's JSWDK1.0.1. If the existing Web server does not support Servlet, you can use some third-party server add-ons (add-ons) to make the Web server support Servlet, in which Live Software company provides a product called JRun, by installing the corresponding version of JRun, you can make Microsoft IIS and Netscape Web Server support Servlet.

The process of developing Servlet

Here is a simple Servlet example to illustrate the process of developing Servlet.

1. Write Servlet code

Java Servlet API is a standard Java extension package that contains two Package ∶ javax.servlet and javax.servlet.http. For developers who want to develop custom protocols based on customers, they should use the classes and interfaces in the javax.servlet package; for developers who only use the HTTP protocol to interact with the client, they only need to use the classes and interfaces in the javax.servlet.http package for development.

The following is a servlet program code (RequestInfoExample.java) ∶

Import java.io.*; import java.servlet.*; import javax.servlet.*; public class RequestInfoExample extends HttpServlet {public void doGet (HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {response.setContentType ("text/html"); PrintWriter out = response.getWriter (); out.println ("< html >"); out.println ("< body >"); out.println ("< head >"); out.println ("< title > Request Information Example < / title >") Out.println ("< / head >"); out.println ("< body >"); out.println ("< h4 > Request Information Example < / h4 >"); out.println ("Method:" + request.getMethod ()); out.println ("RequestURI:" + request.getRequestURI ()); out.println ("Protocol:" + request.getProtocol ()); out.println ("PathInf" + request.getPathInfo ()) Out.println ("Remote Address:" + request.getRemoteAddr ()); out.println ("< / body >"); out.println ("< / html >");} public void doPost (HttpServletRequest request, HttpServletResponse res) throws IOException, ServletException {doGet (request, response);}} so far, I believe you have a deeper understanding of "how to use Servlet", you might as well do it! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.