Last Modified 3.31.2024
Jakarta EE 9
Tested on JDK 11 LTS and Jetty 11
ee9exam
├── pom.xml
├── src
│ └── main
│ └── webapp
│ ├── WEB-INF
│ │ └── web.xml
│ └── index.jsp
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>net.java_school</groupId>
<artifactId>ee9exam</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>ee9exam Maven Webapp</name>
<url>http://localhost:8080</url>
<properties>
<project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>utf-8</project.reporting.outputEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/jakarta.servlet/jakarta.servlet-api -->
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>5.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>ee9exam</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- https://mvnrepository.com/artifact/org.eclipse.jetty/jetty-maven-plugin -->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>11.0.12</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="5.0"
xmlns="https://jakarta.ee/xml/ns/jakartaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee
https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd">
</web-app>
src/main/webapp/
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>jakartaEE 9 Examples</title>
</head>
<body>
<c:choose>
<c:when test="${empty param.name }">
<h4>Hello, World!</h4>
</c:when>
<c:otherwise>
<h4>Hello, ${param.name }!</h4>
</c:otherwise>
</c:choose>
</table>
</body>
</html>
mvn jetty:run
mkdir -p src/main/java/example vi src/main/java/example/InitParamServlet.java
Use jakarta.* instead of javax.* in the package names.
InitParamServlet.java
package example;
import java.io.IOException;
import java.io.PrintWriter;
import jakarta.servlet.ServletConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
public class InitParamServlet extends HttpServlet {
private String url;
private String user;
private String passwd;
private String driver;
@Override
public void init() throws ServletException {
url = this.getInitParameter("url");
user = this.getInitParameter("user");
passwd = this.getInitParameter("passwd");
driver = this.getInitParameter("driver");
}
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException, ServletException {
resp.setContentType("text/html; charset=UTF-8");
PrintWriter out = resp.getWriter();
out.println("url: " + url + "<br />");
out.println("user: " + user + "<br />");
out.println("passwd: " + passwd + "<br />");
out.println("driver: " + driver);
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="5.0"
xmlns="https://jakarta.ee/xml/ns/jakartaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee
https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd">
<servlet>
<servlet-name>InitParamServlet</servlet-name>
<servlet-class>example.InitParamServlet</servlet-class>
<init-param>
<param-name>driver</param-name>
<param-value>oracle.jdbc.driver.OracleDriver</param-value>
</init-param>
<init-param>
<param-name>url</param-name>
<param-value>jdbc:oracle:thin:@127.0.0.1:1521:XE</param-value>
</init-param>
<init-param>
<param-name>user</param-name>
<param-value>scott</param-value>
</init-param>
<init-param>
<param-name>passwd</param-name>
<param-value>tiger</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>InitParamServlet</servlet-name>
<url-pattern>/initParam</url-pattern>
</servlet-mapping>
</web-app>
mvn jetty:run
http://localhost:8080/initParam
Java EE 7-8 in the Spring Framework 5.3.x line
Jakarta EE 9+ in the Spring Framework 6 line
Spring Framework 6 based applications will require a minimum of JDK 17 at runtime, as well as a minimum of Tomcat 10/Jetty 11.
Migrating the book source to Jakarta EE 9
Test: JDK 17, Jetty 11, Spring 6, Spring-Security 6, Servlet 3 File Upload, DBCP2, MyBatis 3.5.x, Hibernate Validator 8
Source: https://github.com/kimjonghoon/JavaWebProgramming2
How to run
Open the log4j2.xml file in the src/main/resources folder and modify the log file path to match your system.
Open the WebContants.java in the net.java_school.commons package and modify the upload directory to match your system.
After stopping Tomcat, run the following:
mvn jetty:run