Spring Boot 404 JSON Error

I am doing some basic spring boot sample. I'm trying to do some json POST.

i can't find resolve of this problem.

Accept: application/json

{ "question":"how old are you ?" } on http://localhost:7603/app but i get this errors

403 Forbidden Show explanation Loading time: 73
Request headers 
Accept: application/json
Origin: chrome-extension://hgmloofddffdnphfgcellkdfbfbjeloo

Content-Type: application/json 
Accept-Encoding: gzip, deflate

Response headers 
Server: Apache-Coyote/1.1 
X-Application-Context: application:7603
Allow: HEAD, GET 
Content-Length: 0 
Date: Sat, 18 Apr 2015 23:38:24 GMT 

__ Program Console Log___

Response does not contain any data.
2015-04-19 01:38:24.745  WARN 49144 --- [nio-7603-exec-3]           o.s.web.servlet.PageNotFound             : Request method 'POST' not supported

---

  package org.apka;

  import java.util.List;

  import org.Entity.Question;
  import org.Repository.DataRepository;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.RequestBody;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RestController;

  @RestController
  @RequestMapping("/app")
  public class MainController {

protected final Log log = LogFactory.getLog(getClass());


private final DataRepository dataRepository;

@RequestMapping(method = RequestMethod.POST)
public void upload(@RequestBody Question question) {
    dataRepository.save(question);
}

@Autowired
public MainController(DataRepository dataRepository) {

    this.dataRepository = dataRepository;
}

@RequestMapping(method = RequestMethod.GET)
public List<Question> getAll() {

    return (List<Question>) dataRepository.findAll();

}

}

---

package demo;

import java.util.Arrays;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@SpringBootApplication
@ComponentScan("org.Repository.DataRepository")
public class DemoApplication {

public static void main(String[] args) {
    ApplicationContext app = SpringApplication.run(DemoApplication.class,
            args);

    System.out.println("Witam:");

    String[] beanNames = app.getBeanDefinitionNames();
    Arrays.sort(beanNames);
    for (String beanName : beanNames) {
        System.out.println(beanName);
    }
  }
  }

---

 package org.Entity;



import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
public class Question  {

 @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private long id;
    private String question;


    protected Question() {}

    public Question(String question) {
        this.question = question;

    }

    @Override
    public String toString() {
        return String.format(
                "Question[id=%d, question='%s']",
                id, question);
    }

}

---

package org.Repository;

import java.util.List;

import org.Entity.Question;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Repository
public interface DataRepository extends CrudRepository<Question, Long> {

List<Question> findByQuestion(String question);
}

---

?xml version="1.0" encoding="UTF-8"?>

http://ift.tt/VE5zRx"> 4.0.0

<groupId>org.test</groupId>
<artifactId>demo</artifactId>
<version>1.3.0-SNAPSHOT</version>
<packaging>jar</packaging>

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

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.0.BUILD-SNAPSHOT</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <start-class>org.apka.ApkaApplication</start-class>
    <java.version>1.7</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <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.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>9.4-1201-jdbc41</version>
        <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>

<repositories>
    <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>http://ift.tt/17sHSGD;
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>http://ift.tt/17sHSWR;
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>
<pluginRepositories>
    <pluginRepository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>http://ift.tt/17sHSGD;
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </pluginRepository>
    <pluginRepository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>http://ift.tt/17sHSWR;
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </pluginRepository>
</pluginRepositories>