maven全新安装不会生成工件SNAPSHOT.jar

Question

I'm making my first steps in Spring Boot and embedded servers. I found this In28Minutes Tutorial which is pretty easy to follow. Now I stuck trying to generate an artifact SNAPSHOT.jar file, which I would import into my RCP-project. Running maven clean install didn't help. Can anyone help me out? Hier are the some informations:

1. Spring Boot framework
2. Spring Boot Starts use Tomcat by default as an embedded server container

Hier is the console output

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ demo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) @ demo ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:3.0.1:testResources (default-testResources) @ demo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/borisnguema/Documents/test-workspace/demo/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.7.0:testCompile (default-testCompile) @ demo ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.21.0:test (default-test) @ demo ---
[INFO] 

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>jar</packaging>

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

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.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-tomcat</artifactId>
            <scope>compile</scope>
        </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-services</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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

Console output (End)

[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Errors: 
[ERROR]   DemoApplicationTests.initializationError » IllegalState Unable to find a @Spri...
[INFO] 
[ERROR] Tests run: 4, Failures: 0, Errors: 1, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.296 s
[INFO] Finished at: 2018-06-10T14:41:23+02:00
[INFO] Final Memory: 24M/437M
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "pom.xml" could not be activated because it does not exist.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.21.0:test (default-test) on project demo: There are test failures.
[ERROR] 
[ERROR] Please refer to /Users/borisnguema/Documents/test-workspace/demo/target/surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date]-jvmRun[N].dump, [date].dumpstream and [date]-jvmRun[N].dumpstream.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

Main:

package bookmarks;

import java.util.Arrays;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import bookmarks.entity.Account;
import bookmarks.entity.Bookmark;
import bookmarks.repository.IAccountRepository;
import bookmarks.repository.IBookmarkRepository;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    CommandLineRunner init(IAccountRepository accountRepository, IBookmarkRepository bookmarkRepository) {
        return (evt) -> Arrays.asList("jhoeller,dsyer,pwebb,ogierke,rwinch,mfisher,mpollack,jlong".split(","))
                .forEach(a -> {
                    Account account = accountRepository.save(new Account(a, "password"));
                    bookmarkRepository.save(new Bookmark(account, "http://bookmark.com/1/" + a, "A description"));
                    bookmarkRepository.save(new Bookmark(account, "http://bookmark.com/2/" + a, "A description"));
                });
    }
}

Answer 1

So I will try to assume, that you didn't create main class and somewhere down you should have something like that:

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.410 s
[INFO] Finished at: 2018-06-10T18:26:06+03:00
[INFO] Final Memory: 32M/1266M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.2.RELEASE:repackage (default) on project demo: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.0.2.RELEASE:repackage failed: Unable to find main class -> [Help 1]

For makeing this working add main class to your src/main/java folder

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class HelloApplication {

    public static void main(String[] args) {
        SpringApplication.run(HelloApplication.class, args);
    }
}

In result of execution of mvn clean install at the end of log you should have:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.043 s
[INFO] Finished at: 2018-06-10T18:29:38+03:00
[INFO] Final Memory: 40M/1004M
[INFO] ------------------------------------------------------------------------

And in target you will get your demo-0.0.1-SNAPSHOT.jar

Hope this will help.

Answer 2

I owe you guys an apology. I messed up big. I was having two test packages as you can see on the picture below. So the first is rightfully set up, but the second wasn't. That is the reason why I had one test failure I couldn't explain. Now, I removed the package and Maven runs trough. Nevertheless, I want to thank you guys for trying to help me with a problem that wasn't really one in the first place :-)