mvn spring-boot:run

mvn clean package

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:803) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:784) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:771) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    at de.conbord.trms.Application.main(Application.java:20) [classes!/:1.0-SNAPSHOT]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_102]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_102]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_102]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_102]
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [trms-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [trms-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) [trms-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:58) [trms-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
Caused by: java.lang.NullPointerException: null
    at de.conbord.trms.controller.TokenBuilder.createToken(TokenBuilder.java:17) ~[classes!/:1.0-SNAPSHOT]
    at de.conbord.trms.api.CheckToken.createNewToken(CheckToken.java:66) ~[classes!/:1.0-SNAPSHOT]
    at de.conbord.trms.api.CheckToken.checkValidToken(CheckToken.java:41) ~[classes!/:1.0-SNAPSHOT]
    at de.conbord.trms.controller.TokenLoader.run(TokenLoader.java:41) ~[classes!/:1.0-SNAPSHOT]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800) [spring-boot-1.4.1.RELEASE.jar!/:1.4.1.RELEASE]
    ... 14 common frames omitted

<?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>de.conbord</groupId>
    <artifactId>trms</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.1.RELEASE</version>
    </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>

    <packaging>jar</packaging>

    <dependencies>
        <!-- Spring Boot JPA -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <!-- lombock -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.8</version>
        </dependency>

        <!-- Thymeleaf -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

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

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>false</optional>
        </dependency>
        <!-- Apache Commons -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>

        <!-- Spring Boot Security -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <!-- MySQL Connector -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.40</version>
        </dependency>

        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.9.4</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>1.4.1.RELEASE</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

</project>

package de.conbord.trms.controller;

import de.conbord.trms.entity.Configuration;
import de.conbord.trms.entity.Token;
import org.springframework.http.HttpEntity;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

public class TokenBuilder {

    public Token createToken(Configuration configuration) {
        String authString = "SIP sip_username=" + configuration.getUserName()
            + " sip_password=" + configuration.getUserPasswort()
            + " sip_database=" + configuration.getDbName()
            + " app_key=" + configuration.getAppGUID();
        String jsonObject = "{"AppliesTo":"localhost:808/staffitprowebAPI/", "TokenType":"http://staffITpro.com/tokens/staffITproSecurityToken/type"}";
        String url = configuration.getUrl() + "Token/";

        MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
        headers.add("Accept", "application/json");
        headers.add("Content-Type", "application/json");
        headers.add("Authorization", authString);

        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());

        HttpEntity<String> request = new HttpEntity<>(jsonObject, headers);

        return restTemplate.postForObject(url, request, Token.class);
    }
}