Spring Boot War deployed to Tomcat

Question

I am trying to deploy a Spring Boot app to Tomcat, because I want to deploy to AWS. I created a WAR file, but it does not seem to run on Tomcat, even though it is visible.

Details:
0. Here is my app:

@Configuration @ComponentScan @EnableAutoConfiguration public class App {     public static void main(String[] args) {         SpringApplication.run(SampleController.class, args);     } }  @Controller @EnableAutoConfiguration public class SampleController {     @RequestMapping("/help")     @ResponseBody     String home() {         String input = "Hi! Please use 'tag','check' and 'close' resources.";         return input;     } } 

application.properties has following:

server.port=${port:7777} 

1. After reading a number of pages and question-answers I added following to my POM:

   http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

   <groupId>com.niewlabs</groupId> <artifactId>highlighter</artifactId> <version>1.0-SNAPSHOT</version>  <packaging>war</packaging>  <properties>     <java.version>1.8</java.version> </properties>     <parent>     <groupId>org.springframework.boot</groupId>     <artifactId>spring-boot-starter-parent</artifactId>     <version>1.1.9.RELEASE</version> </parent>     <dependencies>     <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-web</artifactId>     </dependency>     <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-tomcat</artifactId>         <scope>provided</scope>     </dependency> </dependencies> 

2. I ran"mvn package"and got WAR file (size 250Mb), which I put into "webapps" folder.

3. I started Tomcat and am able to see my app listed, in my case "/highlighter-1.0-SNAPSHOT".
4. Clicking on the link for the app results in "Status 404" page.
5. When I run Spring Boot app just by itself, without container it runs on localhost:7777, but there is nothing there when I run it in Tomcat.

Update: There is another reference. Not sure how useful it is.

Answer 1

This guide explains in detail how to deploy Spring Boot app on Tomcat:
http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#howto-create-a-deployable-war-file

Essentially I needed to add following class:

public class WebInitializer extends SpringBootServletInitializer {        @Override     protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {         return application.sources(App.class);     }     } 

Also I added following property to POM:

<properties>             <start-class>mypackage.App</start-class> </properties> 

Answer 2

Hey make sure to do this changes to the pom.xml

<packaging>war</packaging> 

in the dependencies section make sure to indicated the tomcat is provided so you dont need the embeded tomcat plugin.

    <dependency>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-tomcat</artifactId>         <scope>provided</scope>     </dependency>             <dependency>         <groupId>org.apache.tomcat.embed</groupId>         <artifactId>tomcat-embed-jasper</artifactId>         <scope>provided</scope>     </dependency>        

This is the whole 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>war</packaging>      <name>demo</name>     <description>Demo project for Spring Boot</description>      <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.4.0.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>         <start-class>com.example.Application</start-class>     </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>          <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-tomcat</artifactId>             <scope>provided</scope>         </dependency>                 <dependency>             <groupId>org.apache.tomcat.embed</groupId>             <artifactId>tomcat-embed-jasper</artifactId>             <scope>provided</scope>         </dependency>             </dependencies>      <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build>   </project> 

And the Application class should be like this

Application.java

package com.example;  import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.support.SpringBootServletInitializer;  @SpringBootApplication public class Application extends SpringBootServletInitializer {       /**      * Used when run as JAR      */     public static void main(String[] args) {         SpringApplication.run(Application.class, args);     }      /**      * Used when run as WAR      */     @Override     protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {         return builder.sources(Application.class);     }  } 

And you can add a controller for testing MyController.java

package com.example;  import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody;  @Controller public class MyController {      @RequestMapping("/hi")     public @ResponseBody String hiThere(){         return "hello world!";     } } 

Then you can run the project in a tomcat 8 version and access the controller like this

http://localhost:8080/demo/hi

If for some reason you are not able to add the project to tomcat do a right click in the project and then go to the Build Path->configure build path->Project Faces

make sure only this 3 are selected

Dynamic web Module 3.1 Java 1.8 Javascript 1.0