CODEWITHSUNDEEP
tomcatintellij-ideaservletsjakarta-ee
Alexander Lopatin
Alexander Lopatin

Reputation: 582

Standard project Java EE Servlets doesn't work in Intellij IDEA

I generated a standard project of servlet in IntelliJ IDEA.

Problem:

When I open localhost:8080/javaee in the browser it works.

enter image description here

But when I try to open servlet page: localhost:8080/javaee/hello-servlet I get 404 error.

enter image description here

Project:

I use Maven, here is 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>java-ee</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>java-ee</name>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.target>11</maven.compiler.target>
        <maven.compiler.source>11</maven.compiler.source>
        <junit.version>5.7.1</junit.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>jakarta.servlet</groupId>
            <artifactId>jakarta.servlet-api</artifactId>
            <version>5.0.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.1</version>
            </plugin>
        </plugins>
    </build>
</project>

Here is the structure of the project:

enter image description here

index.jsp has next content:

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %>
</h1>
<br/>
<a href="hello-servlet">Hello Servlet</a>
</body>
</html>

HelloServlet.java

package com.example;

import java.io.*;

import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;

@WebServlet(name = "helloServlet", value = "/hello-servlet")
public class HelloServlet extends HttpServlet {
    private String message;

    public void init() {
        message = "Hello World!";
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("text/html");

        // Hello
        PrintWriter out = response.getWriter();
        out.println("<html><body>");
        out.println("<h1>" + message + "</h1>");
        out.println("</body></html>");
    }

    public void destroy() {
    }
}

And here is my configuration for a running of Tomcat server from Intellij Idea:

enter image description here

enter image description here

Upvotes: 2

Views: 1110

Answers (1)

Heshan Andrews
Heshan Andrews

Reputation: 75

You either need to update your tomcat version to 10 or downgrade your servlet api to use javax.servlet-api instead of jakarta.servlet-api (what's specified in your current pom.xml file)

Up until tomcat version 10, tomcat supported javax as the servlet API but after tomcat 10 they only support jakarta.

Migration docs: https://tomcat.apache.org/migration-10.html#Migrating_from_9.0.x_to_10.0.x

Let me answer in a pseudo code cuz why not xD,

if (tomcat.version >= 10) 
  use jakarta.servlet-api
else 
  use javax.servlet-api

Upvotes: 4

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