Maven (3)-use intellij idea to create a maven web project, intellijmaven

Maven (3)-use intellij idea to create a maven web project, intellijmaven

This article uses an example to describe how to use maven to build a web project. Development Tool: intellij idea.

1. Create a maven Project

Select Create from archetype. Create a project from an existing maven template. Select maven-archetype-webapp template this time. After this template is selected, the generated project will contain the files required by webapp. Convenient. You can also create a blank maven project without selecting this option, and manually add the files required by the web.

Enter maven coordinates for the project

2. Configure the maven project structure

Generate a maven Project

The above project only contains the directory structure required by the web-app and the basic maven project element: pom. The standard maven project structure is as follows:

The complete project directory:

3.Add a Servlet

This Servlet function is very simple: Output a sentence.

package com.cnblogs.kmpp;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;public class WebAppServlet extends HttpServlet {    public void doGet(HttpServletRequest request,                      HttpServletResponse response)            throws ServletException, IOException {        PrintWriter out = response.getWriter();        out.println( "WebAppServlet Executed" );        out.flush();        out.close();    }}

The Servlet above has a dependency on J2EE and needs to add a dependency on j2ee in pom.

<dependency>    <groupId>org.apache.geronimo.specs</groupId>    <artifactId>geronimo-servlet_3.0_spec</artifactId>    <version>1.0</version></dependency>

Configure servlet

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app>  <display-name>Archetype Created Web Application</display-name>    <servlet>        <servlet-name>WebApp</servlet-name>        <servlet-class>com.cnblogs.kmpp.WebAppServlet</servlet-class>    </servlet>    <servlet-mapping>        <servlet-name>WebApp</servlet-name>        <url-pattern>/simple-servlet</url-pattern>    </servlet-mapping></web-app>

ThuRun the web app

The running of web projects can be implemented through tomcat, but now maven has been used to implement this function through a maven plug-in: jetty (Jetty is an open-source servlet container, it provides runtime environments for Java-based web containers, such as JSP and servlet ).

Run jetty: locate the command line in the directory of the current project and enter the following command:

The result is as follows:

Jetty is started at this time.

Enter http: // localhost: 8080/web-app/in the browser /.

 

This interface is the default index. jsp page of web-app.

The above shows the default output. A simple servlet has been defined and configured in web. xml. This can also be run. Enter http: // localhost: 8080/web-app/simple-servlet in the browser

The above page output is previously implemented in WebAppServlet.

So far, a maven web project has been created and runs successfully.