spring boot error 404 while starting jar - spring

Question

I’m trying to run a spring boot application. I downloaded a code from a tutorial so I know the code works. When I run my jar file, it looks like the applications I running on port 8080 but still I get 404 for any URL, I never got the spring white label page. I checked that I don’t have anything else running on port 8080, and the server I up and running.
I have no clue why my applications are not responding.
running the jar
error 404
package com.virtualpairprogrammers;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* Created by masn on 2017-04-01.
*/
#RestController
public class HelloController {
#RequestMapping("/hello")
public String sayHello(){
return "Hello";
}
}
enter code here
package com.virtualpairprogrammers;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class FleetmanApplication {
public static void main(String[] args) {
SpringApplication.run(FleetmanApplication.class, args);
}
}
enter code here
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.virtualpairprogrammers</groupId>
<artifactId>fleetman</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>fleetman</name>
<description>VPP´s Fleet Management Application</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.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>

Answer 1

If you run the command java -jar YourAppName.jar you must be located inside the root folder (fleetman) and NOT INSIDE the target folder where the .jar is located.
This is a common mistake so run the command inside the fleetman folder.
You might want to update the pom.xml with this
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>

Answer 2

Just try like this and it will work:
#RestController
public class HelloController {
#RequestMapping(path = "/hello", method = RequestMethod.GET)
public String hello() {
return "hello";
}
}
Here's the screenshot I've taken from my computer: