Unable to run localhost in Spring Boot application (Tomcat server)

I've been learning Spring using the following tutorials: https://www.youtube.com/playlist?list=PLqq-6Pq4lTTbx8p2oCgcAQGQyqN8XeA1x

I have created a Maven project and tried to run the Spring Boot application while referring to these videos:

https://www.youtube.com/watch?v=E7_a-kB46LU&index=9&list=PLqq-6Pq4lTTbx8p2oCgcAQGQyqN8XeA1x

I tried to run my Spring application on Tomcat server but the localhost isn't working. (Port 8080)

My pom.xml looks like this:

<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>io.javabrains.springbootquickstart</groupId>
<artifactId>course-api-new</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Java Brains Course API</name>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

<properties>
<java.version>1.8</java.version>
</properties>

</project>


CourseApiApp.java :

package io.javabrains.springbootstarter;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class CourseApiApp

public static void main(String args)
SpringApplication.run(CourseApiApp.class, args);






According to the video localhost should display Whitelist error on running the application, but it doesn't run at all.

Any help would be appreciated, thanks!

6 Answers
6

I would suggest that you start your project from beginning. To create a valid spring-boot project you have a very good web based generator for spring-boot starter applications.

spring-boot

spring-boot

For a web application with an embedded tomcat you should use web project.

web

Using STS you can create the same by choosing new -> spring starter project.

STS

new -> spring starter project

A wizard will appear and you can choose your project informations:

And then in the second step you dependencies:

After generating your project your pom.xml should look like that:

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>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>demo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>


Your application should start normally and tomcat listens on localhost:8080.

localhost:8080

It could be possible that STS by default uses Tomcat version 7 and if you happen to use version 8, then would need to specify the same in pom.xml

<properties>
<tomcat.version>8.0.47</tomcat.version>
</properties>


You should try to run spring-boot as sudo

sudo mvn spring-boot:run


I also faced the same issue. Try creating Spring Boot apprlication by choosing Spring Boot starter project in STS.
Right click on STS->New->Spring Starter Project->Give name and click on Next->Choose Web and tick mark on Web and search for Dev Tools and tick mark Dev Tools and click on Finish

Now click on the project and Run as Spring Boot Application.

In application.properties put server.port=8080

I faced the similar issue. I too was following the JavaBrains SpringBoot example. This is what I did:
I created a fresh spring boot project using STS tool and included the same code as provided by you and it worked!

Thanks for contributing an answer to Stack Overflow!

But avoid …

To learn more, see our tips on writing great answers.

Required, but never shown

Required, but never shown

By clicking "Post Your Answer", you agree to our terms of service, privacy policy and cookie policy