checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <property name="severity" value="error"/>
    <property name="localeLanguage" value="en"/>

    <module name="FileTabCharacter">
        <property name="fileExtensions" value="java"/>
    </module>

    <module name="SuppressionSingleFilter">
        <property name="files" value=".*[\\/]generated-sources[\\/]"/>
    </module>

    <module name="FileTabCharacter"/>

    <module name="BeforeExecutionExclusionFileFilter">
        <property name="fileNamePattern" value=".*[\\/]src[\\/]test[\\/].*$"/>
    </module>

    <module name="TreeWalker">
        <module name="SuppressionCommentFilter">
            <property name="offCommentFormat" value="CHECKSTYLE_OFF: WHOLE_FILE"/>
        </module>
        <!-- code cleanup -->
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>
        <module name="RedundantImport"/>
        <module name="IllegalImport"/>
        <module name="ImportOrder">
            <property name="option" value="bottom"/>
            <property name="groups" value="brave,com,feign,io,/^java\./,javax,lombok,net,org,jakarta"/>
            <property name="ordered" value="true"/>
            <property name="separated" value="true"/>
            <property name="separatedStaticGroups" value="true"/>
            <property name="sortStaticImportsAlphabetically" value="true"/>
        </module>
<!--        <module name="UnnecessaryParentheses"/>-->

        <!-- style -->
        <module name="DefaultComesLast"/>
        <module name="EmptyStatement"/>
        <module name="ArrayTypeStyle"/>
        <module name="UpperEll"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>
        <module name="EmptyStatement"/>
        <module name="ConstantName">
            <property name="format" value="(^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$)|(^log$)"/>
            <property name="applyToProtected" value="false"/>
            <property name="applyToPrivate" value="false"/>
        </module>
        <module name="LocalVariableName"/>
        <module name="LocalFinalVariableName"/>
        <module name="MemberName"/>
        <module name="ClassTypeParameterName">
            <property name="format" value="^[A-Z0-9]*$"/>
        </module>
        <module name="MethodTypeParameterName">
            <property name="format" value="^[A-Z0-9]*$"/>
        </module>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>
        <module name="AvoidStarImport"/>

        <!-- whitespace -->
        <module name="EmptyLineSeparator">
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>
        <module name="TypecastParenPad"/>
        <module name="SingleSpaceSeparator"/>
        <module name="GenericWhitespace"/>
        <module name="NoWhitespaceBefore"/>
        <module name="WhitespaceAfter"/>
        <module name="NoWhitespaceAfter"/>
        <module name="WhitespaceAround">
            <property name="allowEmptyConstructors" value="true"/>
            <property name="allowEmptyMethods" value="true"/>
        </module>
        <module name="Indentation"/>
        <module name="MethodParamPad"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="RedundantModifier"/>

        <!-- locale-sensitive methods should specify locale -->
        <module name="Regexp">
            <property name="ignoreComments" value="true"/>
        </module>
    </module>
</module>