checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN" "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<!-- Generated by RHY @will_awoke -->

<module name="Checker">

    <!--<property name="charset" value="UTF-8"/>-->
    <!--<property name="severity" value="warning"/>-->

    <!-- Checks for Size Violations.  -->
    <!-- 检查文件的长度（行） default max=2000 -->
    <module name="FileLength">
        <property name="max" value="2500"/>
    </module>

    <!-- Checks that property files contain the same keys. -->
    <!-- 检查**.properties配置文件 是否有相同的key
    <module name="Translation">
    </module>
    -->

    <module name="TreeWalker">

        <!-- See http://droidyue.com/blog/2016/05/22/use-checkstyle-for-better-code-style/ -->
        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html -->

        <module name="IllegalImport"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>

        <module name="FallThrough"/>

        <!-- Checks for whitespace                               -->
        <!-- See http://checkstyle.sf.net/config_whitespace.html -->

        <module name="GenericWhitespace"/>
        <module name="EmptyForIteratorPad"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>

        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html -->
        <module name="AvoidNestedBlocks"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>
        <module name="NeedBraces">
            <property name="tokens" value="LITERAL_DO, LITERAL_IF, LITERAL_ELSE, LITERAL_FOR, LITERAL_WHILE"/>
        </module>

        <!-- non-static fields -->
        <module name="MemberName">
            <property name="format" value="(^[a-z][a-zA-Z0-9]{0,29}$)"/>
        </module>

        <!--检查switch中case后是否加入了跳出语句，例如：return、break、throw、continue -->
        <module name="FallThrough"/>

        <!-- Checks the number of parameters of a method or constructor. max default 7个. -->
        <module name="ParameterNumber">
            <property name="max" value="19"/>
        </module>

        <!-- 每行字符数 -->
        <module name="LineLength">
            <property name="max" value="200"/>
        </module>

        <!-- Checks for long methods and constructors. max default 150行. max=300 设置长度300 -->
        <module name="MethodLength">
            <property name="max" value="300"/>
        </module>

        <!-- ModifierOrder 检查修饰符的顺序，默认是 public,protected,private,abstract,static,final,transient,volatile,synchronized,native -->
        <module name="ModifierOrder">
        </module>

        <!-- 检查是否有多余的修饰符，例如：接口中的方法不必使用public、abstract修饰  -->
        <module name="RedundantModifier">
        </module>

        <!--- 字符串比较必须使用 equals() -->
        <module name="StringLiteralEquality">
        </module>

        <!-- if-else嵌套语句个数 最多4层 -->
        <module name="NestedIfDepth">
            <property name="max" value="3"/>
        </module>

        <!-- try-catch 嵌套语句个数 最多2层 -->
        <module name="NestedTryDepth">
            <property name="max" value="2"/>
        </module>

    </module>

</module>