maven生成javadoc文件

<plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-javadoc-plugin</artifactId>
   <version>2.10.2</version>
   <configuration>
      <aggregate>true</aggregate>
   </configuration>
   <executions>
      <execution>
         <id>attach-javadocs</id>
         <goals>
            <goal>jar</goal>
         </goals>
      </execution>
   </executions>
</plugin>