Why maven packege produce 4 jar files? - maven

Question

When I run mvn package,there are 4 files produced in total:
foo.jar
foo.zip
foo-1.0-SNAPSHOT.jar
foo.1.0-SNAPSHOT.jar.original
Could anyone please explain what leads to this situation?Is it some plugin that I used?
Here is some piece of my pom.xml:
<modelVersion>4.0.0</modelVersion>
<groupId>cn.bar.buzz</groupId>
<artifactId>foo</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
... some dependencies
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>1.5.16.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<resources>
<resource>
<directory>src/main/resources/web</directory>
<includes>
<include>**/*</include>
</includes>
</resource>
<resource>
<directory>src/main/resources/${profiles.active}</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.5.16.RELEASE</version>
<configuration>
<fork>true</fork>
<mainClass>cn.bar.service.MyApplication</mainClass>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>cn.bar.service.AnotherApplication</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<finalName>${project.artifactId}</finalName>
<appendAssemblyId>false</appendAssemblyId>
<descriptors>
<descriptor>assembly.xml</descriptor>
</descriptors>
<outputDirectory>target</outputDirectory>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
Is maven itself package for me or the plugins? If the latter,which plugin did which part of job?

Answer 1

spring-boot-maven-plugin produce foo-1.0-SNAPSHOT.jar and
foo.1.0-SNAPSHOT.jar.original
maven assembly plugin created zip file
maven default procude jar