I have been attempting to create a spring boot deployable war so that it can be deployed to a tomcat server (I would like to note that it runs fine as an executable jar). However, I have been running into the following exception which occurs on my Tomcat 9 server (I have one running within IntelliJ and another one running on a linux server, both throw the same exception):
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.example.demo.DemoApplication]; nested exception is java.lang.NoClassDefFoundError: org/springframework/context/annotation/AdviceMode
From my understanding, this lives in the spring-context jar, which is correctly being pulled into the build via maven. I created a super simple demo app with spring boot and I really can't see why I would be running into this issue.
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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<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>
<properties>
<java.version>11</java.version>
<start-class>com.example.demo.DemoApplication</start-class>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.5</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
And here is the main application file:
DemoApplication.java
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#SpringBootApplication
#RestController
public class DemoApplication extends SpringBootServletInitializer {
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(DemoApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#RequestMapping(value = "/")
public String hello() {
return "Hello World from Tomcat";
}
}
I am at a total loss as to why I'm hitting this ClassNotFoundException. Looking at the war file, I do see all the appropriate libraries in the WEB-INF/lib folder. The two files I pasted above are literally all the project I'm attempting to run is.
I have looked at this guide: Spring Boot Traditional Deployment
If I remove extends SpringBootServletInitializer, then the error goes away, but then I of course don't really have a functional spring boot war file.
did you import spring-boot-starter-web? This class is located in context lib that is imported by spring-boot-starter-web
Well, apparently I had a lib in my Tomcat lib folder that was built to include ALL dependent libraries... which happens to have a spring dependency... so it was pulling in an older version of spring, which was causing a conflict. With the jar swapped out with one that doesn't include all dependencies, it loaded.
Related
I have downloaded spring boot example from https://start.spring.io/.
I tried many times but i get same error again and again:
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
at com.example.demo.Application.main(Application.java:10)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
Here is my 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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>SpringBoot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringBoot</name>
<description>Demo project for Spring Boot</description>
<properties>
<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-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
and SpringBootClass
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
also my ControllerClass
package com.example.demo.controller;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
#RestController
#EnableAutoConfiguration
public class HelloWorldController {
#RequestMapping("/hello")
#ResponseBody
public String sayHello() {
return "Hello World Developer!!!";
}
}
I am struggling from past three days and not getting any help from anywhere.
I am using Spring Tool Suite
I am new to Spring Boot and need help here
Set Maven to you path and try from command prompt/ terminal with command:
mvn clean install
this will create jar file in target folder.
go to target folder and run java -jar jarName.jar.
OR
Try cleaning the project from project tab,
Add all the maven dependencies to eclipse build path.
Then try running it as java application.
It is caused by a corrupt Maven repository.
Delete everything under C:\Users\<me>\.m2\repository.
Then do Eclipse Maven Update, and it will work.
it is like spring-boot.jar got corrupted.
I'm leanring springboot with some source code.Recent days,when I begin learning new lessons and want to import the example project I found I fail to import all the packages when I open the example project. Although previous example projects works fine.
It's especially strange that the editor actually can identify those packages - it even offered me the appropriate classes when I manually deleted the import statements, I can see the library in the Project tree under External Libraries,I even can skip to see where the package is through ctrl+click. However, I always get a list of "java: package ... does not exist" upon compilation.How should I solve the problem?Thanks!!
I hava tried following solutions:
reimport in maven settings
invalidate and restart
3.check pom.xml
my pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.neo</groupId>
<artifactId>spring-boot-file-upload</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
</parent>
<properties>
<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-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
some of the wrong import
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
error messages while compiling:
fail to import all the packages
therefore can't resolve all the related symbols
Your project is missing some dependencies. You are not only using Spring Boot, but also Spring Web and Spring MVC.
Try adding this to your pom.xml:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
You may want to adapt depending on the Spring version you are using.
This is a Simple Microservice built using spring-boot. The application is working fine when I execute as Java Application. But when I run on Server i.e. Tomcat Server v8.5 the Server shows Started & Syncnorized but in console, the spring-boot logo doesn't appear and the application doesn't start. Other Projects on my IDE are working fine.
I tried following but didn't work:
1)Delete Server and add again.
2)Clean the Project using Maven.
3)Changed BuildPath Settings(JDK Version, Facets, etc).
Screenshot to refer
1) https://i.imgur.com/fVFLhNK.png
2)https://i.imgur.com/nTSWEGd.png
Main App
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
#SpringBootApplication
public class ShUsersApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(ShUsersApplication.class, args);
}
}
Controller
package com.logituit.sitehawk.Controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpEntity;
import org.springframework.lang.NonNull;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.google.gson.Gson;
import com.logituit.sitehawk.Model.Contract;
import com.logituit.sitehawk.Service.UserService;
#RestController
#RequestMapping("/sitehawk")
public class UserController {
private UserService userService;
private Gson gson;
#Autowired
public UserController(#NonNull final UserService userService, #NonNull Gson gson) {
this.userService = userService;
this.gson = gson;
}
#PostMapping("/save")
public String saveDetails(HttpEntity<String> httpEntity) {
final Contract contract = gson.fromJson(httpEntity.getBody(), Contract.class);
if (contract != null) {
userService.createTicketBySite(contract);
return "Success";
} else
return "Failed";
}
#GetMapping("/ticketsfromsite/{siteId}")
public List<Contract> getAllTicketsBySite(HttpEntity<String> httpEntity, #PathVariable("siteId") final int siteId) {
return userService.getTicketsBySite(siteId);
}
}
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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.logituit.sitehawk</groupId>
<artifactId>SH_Users</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>SH_Users</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</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>
application.properties
#Local Database
spring.datasource.url = jdbc:mysql://localhost:3306/site_hawk
spring.datasource.username = root
spring.datasource.password = admin123
server.port=8089
Please help me how can I run my spring-boot App.I'm want to see Spring boot running on the console. But the Big Logo of Spring Boot doesn't appear on the console.
The normal deployment format for application containers (Tomcat included) is .war however Spring Boot by default packages a runnable jar file.
You can change the packaging format in pom.xml file.
<packaging>war</packaging>
You may also need to add an additional dependency for Tomcat specific classes.
...
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
Such setup should yield a .war file to $project_dir/target/classes which most servlet containers can successfully run.
Server doesn't simple print everything in the console, since there will be a lot of applications running at the same time, the console is going to be a big confuse messy with so many "System.out", so the solution to the servers is put on log to each application. Try to find you application logs, maybe the spring logo will be there.
Be sure also that you are uploading a .war file. The jar package is for running is you pc. For Tomcat you need to send the .war file. You can simple change the packaging type in your pom.xml.
Usage - Apache Maven WAR Plugin
To run your application in tomcat server you should exclude the embedded one via :
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
And as käyrätorvi said package your application as war
Spring boot applications include an embedded web server and can be run in a number of ways. Tomcat is included by default which can be overridden by other servers. You can find the reference here and here.
Spring boot applications, unlike traditional java web applications, are simplified in terms of running and deploying. As a developer, you can focus on developing the core logic, exposing the endpoints etc. Once built, these applications are ready to run and do not need to be deployed on an explicit server as they run on an embedded server that comes from spring boot starter web dependency.
I have a web application using maven & spring boot with a war deployment.
While it works normally on a windows machine (starting it using netbeans), I get a blank page response from browser when I run it on a linux machine (not sure if this is relevant). No errors occur on startup.
After searching a while I found that it is related with some 404 error response of spring boot. This happens for any route that I try (valid or not)
Another clue is that I tried to redirect 404 errors to a test.jsp but nothing changed in the browsers (I still get this blank page). With postman I get this .jsp as a response.
In any case it's not normal to get an error response since the routes are correct.
Here is my 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>org</groupId>
<artifactId>app</artifactId>
<version>1.0-RELEASE</version>
<packaging>war</packaging>
<name>webapp</name>
<description></description>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Provided
<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>-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.11.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<includeSystemScope>true</includeSystemScope>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<!--<failOnMissingWebXml>true</failOnMissingWebXml>-->
<webResources>
<resource>
<directory>${basedir}/src/main/resources/lib</directory>
<targetPath>WEB-INF/lib</targetPath>
</resource>
</webResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
Any ideas?
EDIT
I add some extra info that might help:
No MVC-relevant configuration is included in application.properties
Application.java (I'm not using #EnableWebMvc):
#SpringBootApplication
#EnableScheduling
public class Application extends SpringBootServletInitializer {
private static final Logger log = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
}
Web MVC Configuration is done by:
#Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {
#Bean
public ViewResolver getPageViewResolver(){
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/pages/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
resolver.setOrder(1);
return resolver;
}
}
After some tries I conclude that:
mvn spring-boot:run
java -classpath "lib/*:classes/." org.app.Application
java -jar webapp-1.0.RELEASE.war
start the app as a normal application which leads to this problem. No matter if pom packing is defined as jar or war (If I'm wrong someone pls correct me)
Netbeans was deploying the app into an external tomcat server. I finally tried the classic war deployment way in order to make it work.
This answer is not solving the original question but provides a fix in case someone else has the same problem.
I m trying to do Spring MVC tutorial:
It makes you create a main controller ad start a SpringApplication.
When I run the SpringApplication, I can see that a Tomcat server gets started, a controller class gets instanced as it should.
However, the mapping seems to fail : #RequestMapping("/greeting")
When I try to browse http://localhost:8080/TestSpringOpenEMM2/greeting
or http://localhost:8080/TestSpringOpenEMM2/greeting , I always get a 404 error.
(TestSpringOpenEMM2 is my project name).
I use eclipse IDE.
Here are my files:
package application;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
System.out.println("App starting" );
SpringApplication.run(Application.class, args);
System.out.println("App started" );
}
}
controller:
import javax.servlet.annotation.WebServlet;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
#Controller
public class GreetingController {
static{
System.out.println("Static init GreetingController");
}
#RequestMapping("/greeting")
public String greeting(#RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
System.out.println("starting servlet (greeting)");
model.addAttribute("name", name);
return "greeting";
}
public GreetingController(){
super();
System.out.println("new GreetingController");
}
}
pom:
<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>TestSpringOpenEMM2</groupId>
<artifactId>TestSpringOpenEMM2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>1.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>1.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-juli</artifactId>
<version>8.0.23</version>
</dependency>
</dependencies>
</project>
Maybe you can use #RestController not #Controller. For REST api, if I use #Controller, the request will cause a 404 not found error, but after I change it to #RestController, the request works fine.
If you raise the Spring log level it should, when web-app starts, show you which URLs are being mapped to which classes/methods. That may help.
Also, if you're using Eclipse, right click project -> Properties -> Web Project Settings -> Context root. Make sure it is as you expect it to be i.e. TestSpringOpenEMM2. I have seen plenty of examples of this (context root) not being as expected in Eclipse.
The spring-boot-starter-parent is a great way to use Spring Boot, hence use a pom.xml 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>TestSpringOpenEMM2</groupId>
<artifactId>TestSpringOpenEMM2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>
By default spring boot using a embedded tomcat container, you just need to run the main method. Read more on this topic on Spring Boot's Doc