老师这些需要删除吗 我是用idea的 jdk8.55

<properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <maven.compiler.source>1.7</maven.compiler.source>
 <maven.compiler.target>1.7</maven.compiler.target>
</properties>



<build>
 <finalName>o2o</finalName>
 <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
   <plugins>
     <plugin>
       <artifactId>maven-clean-plugin</artifactId>
       <version>3.1.0</version>
     </plugin>
     <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
     <plugin>
       <artifactId>maven-resources-plugin</artifactId>
       <version>3.0.2</version>
     </plugin>
     <plugin>
       <artifactId>maven-compiler-plugin</artifactId>
       <version>3.8.0</version>
     </plugin>
     <plugin>
       <artifactId>maven-surefire-plugin</artifactId>
       <version>2.22.1</version>
     </plugin>
     <plugin>
       <artifactId>maven-war-plugin</artifactId>
       <version>3.2.2</version>
     </plugin>
     <plugin>
       <artifactId>maven-install-plugin</artifactId>
       <version>2.5.2</version>
     </plugin>
     <plugin>
       <artifactId>maven-deploy-plugin</artifactId>
       <version>2.8.2</version>
     </plugin>
   </plugins>
 </pluginManagement>
</build>