Update import package statement position and doc comment details to pass checkstyle plugin #2621
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Describe what this PR does / why we need it
When building the latest SCA cloned from github via maven, some of the SCA components (such as Nacos and RocketMQ) do not pass the checkstyle check and report an error
Does this pull request fix one issue?
Fixes #2620
Describe how you did it
Check the checkstyle-result.xml file in the target directory to locate the specific line where the class does not meet the code specification
Describe how to verify it
Modify the code according to the error message by following the row and column positions indicated by the error tag in the checkstyle-result.xml in the target directory
Afterwards, run
mvn clean install -DskipTests
to confirm that the checkstyle plugin checks out