前段时间研究了一下SUN的编码规范,公司在经过再三考虑之后,决定在我们项目组试用。
      以下是我以过对SUN的CheckStyle进行学习后修正的XML文档,在eclipse中导入后即可使用。下面中以<module>开关的,被我注释掉的部分为我们修正的部分。
      相关的详细信息,可以参看下面每个module对应的url。
      <?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<module name="Checker">
 <property name="severity" value="warning"/>

    <!-- Checks that a package.html file exists for each package.     -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html#PackageHtml -->
    <module name="PackageHtml"/>

    <!-- Checks whether files end with a new line.                        -->
    <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
    <!--<module name="NewlineAtEndOfFile"/>-->

    <!-- Checks that property files contain the same keys.         -->
    <!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
    <!--<module name="Translation"/>-->


    <module name="TreeWalker">

        <!-- Checks for Javadoc comments.                     -->
        <!-- See http://checkstyle.sf.net/config_javadoc.html -->
        <module name="JavadocMethod"/>
        <module name="JavadocType"/>
        <module name="JavadocVariable"/>
        <module name="JavadocStyle"/>


        <!-- Checks for Naming Conventions.                  -->
        <!-- See http://checkstyle.sf.net/config_naming.html -->
  <module name="ConstantName"/>
        <module name="LocalFinalVariableName">
   <property name="format" value="^[a-z][a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
  </module>
        <module name="LocalVariableName">
   <property name="format" value="^[a-z][a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
  </module>
        <module name="MemberName">
   <property name="format" value="^[a-z][a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
  </module>
        <module name="MethodName"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName">
   <property name="format" value="^[a-z][a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
  </module>
        <module name="TypeName"/>


        <!-- Checks for Headers                                -->
        <!-- See http://checkstyle.sf.net/config_header.html   -->
        <!-- <module name="Header">                            -->
            <!-- The follow property value demonstrates the ability     -->
            <!-- to have access to ANT properties. In this case it uses -->
            <!-- the ${basedir} property to allow Checkstyle to be run  -->
            <!-- from any directory within a project. See property      -->
            <!-- expansion,                                             -->
            <!-- http://checkstyle.sf.net/config.html#properties        -->
            <!-- <property                                              -->
            <!--     name="headerFile"                                  -->
            <!--     value="${basedir}/java.header"/>                   -->
        <!-- </module> -->

        <!-- Following interprets the header file as regular expressions. -->
        <!-- <module name="RegexpHeader"/>                                -->


        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html -->
        <module name="AvoidStarImport"/>
        <!--<module name="IllegalImport"/> --><!-- defaults to sun.* packages -->
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>


        <!-- Checks for Size Violations.                    -->
        <!-- See http://checkstyle.sf.net/config_sizes.html -->
        <module name="FileLength"/>
        <!--<module name="LineLength"/>-->
  <module name="LineLength">
   <property name="max" value="120"/>
  </module>
        <module name="MethodLength"/>
        <!--<module name="ParameterNumber"/>-->


        <!-- Checks for whitespace                               -->
        <!-- See http://checkstyle.sf.net/config_whitespace.html -->
        <!--<module name="EmptyForIteratorPad"/>-->
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <!--<module name="TabCharacter"/>-->
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>


        <!-- Modifier Checks                                    -->
        <!-- See http://checkstyle.sf.net/config_modifiers.html -->
        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>


        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html -->
        <module name="AvoidNestedBlocks"/>
        <module name="EmptyBlock"/>
        <module name="LeftCurly"/>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>


        <!-- Checks for common coding problems               -->
        <!-- See http://checkstyle.sf.net/config_coding.html -->
        <module name="AvoidInlineConditionals"/>
        <module name="DoubleCheckedLocking"/>    <!-- MY FAVOURITE -->
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <!--<module name="HiddenField"/>-->
        <module name="IllegalInstantiation"/>
        <module name="InnerAssignment"/>
        <!--<module name="MagicNumber"/>-->
        <module name="MissingSwitchDefault"/>
        <module name="RedundantThrows"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>

        <!-- Checks for class design                         -->
        <!-- See http://checkstyle.sf.net/config_design.html -->
        <!--<module name="DesignForExtension"/>-->
        <module name="FinalClass"/>
       <!-- <module name="HideUtilityClassConstructor"/>-->
        <!--<module name="InterfaceIsType"/>-->
        <module name="VisibilityModifier"/>


        <!-- Miscellaneous other checks.                   -->
        <!-- See http://checkstyle.sf.net/config_misc.html -->
        <module name="ArrayTypeStyle"/>
        <!--<module name="FinalParameters"/>-->
        <module name="GenericIllegalRegexp">
            <property name="format" value="\s+$"/>
            <property name="message" value="Line has trailing spaces."/>
        </module>
        <!--<module name="TodoComment"/>
        <module name="UpperEll"/>-->

    </module>

</module>

下面这个XML文件,与上面的一样,不过加了些中文注释,如下:
<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<!--

  Checkstyle configuration that checks the sun coding conventions from:

    - the Java Language Specification at
      http://java.sun.com/docs/books/jls/second_edition/html/index.html

    - the Sun Code Conventions at http://java.sun.com/docs/codeconv/

    - the Javadoc guidelines at
      http://java.sun.com/j2se/javadoc/writingdoccomments/index.html

    - the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html

    - some best practices

  Checkstyle is very configurable. Be sure to read the documentation at
  http://checkstyle.sf.net (or in your downloaded distribution).

  Most Checks are configurable, be sure to consult the documentation.

  To completely disable a check, just comment it out or delete it from the file.

  Finally, it is worth reading the documentation.

-->

<module name="Checker">
 <property name="severity" value="warning"/>

    <!-- Checks that a package.html file exists for each package.     -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html#PackageHtml
 检查是否有一个兄弟html文件-->
    <module name="PackageHtml"/>

    <!-- Checks whether files end with a new line.                        -->
    <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile
 检查文件是否以新的一行结尾-->
    <!--<module name="NewlineAtEndOfFile"/>-->

    <!-- Checks that property files contain the same keys.         -->
    <!-- See http://checkstyle.sf.net/config_misc.html#Translation
 检查资源文件是否一致-->
    <!--<module name="Translation"/>-->


    <module name="TreeWalker">

        <!-- Checks for Javadoc comments.                     -->
        <!-- See http://checkstyle.sf.net/config_javadoc.html
  检查方法,类和接口,变量是否有javadoc,
  javadocStyle是检查以上的javadoc是否规范,如以.结尾,有@param,@returnt等-->
        <module name="JavadocMethod"/>
        <module name="JavadocType"/>
        <module name="JavadocVariable"/>
        <module name="JavadocStyle"/>


        <!-- Checks for Naming Conventions.                  -->
        <!-- See http://checkstyle.sf.net/config_naming.html
  检查变量是否符合规范(正则表达示),在全局上可以使用,但是可以变通,有warn也不用修改-->
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>


        <!-- Checks for Headers                                -->
        <!-- See http://checkstyle.sf.net/config_header.html   -->
        <!-- <module name="Header">                            -->
            <!-- The follow property value demonstrates the ability     -->
            <!-- to have access to ANT properties. In this case it uses -->
            <!-- the ${basedir} property to allow Checkstyle to be run  -->
            <!-- from any directory within a project. See property      -->
            <!-- expansion,                                             -->
            <!-- http://checkstyle.sf.net/config.html#properties        -->
            <!-- <property                                              -->
            <!--     name="headerFile"                                  -->
            <!--     value="${basedir}/java.header"/>                   -->
        <!-- </module> -->

        <!-- Following interprets the header file as regular expressions. -->
        <!-- <module name="RegexpHeader"/>                                -->


        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html
  对导入的包进行检查。有没有带*的,无效的包(默认sun.*),
  多余的导入(重复导入,导入的包包含在java.lang中,比如导入java.lang.String,类从同一个包中导入),
  没有使用的导入-->
        <module name="AvoidStarImport"/>
        <!--<module name="IllegalImport"/> --><!-- defaults to sun.* packages -->
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>


        <!-- Checks for Size Violations.                    -->
        <!-- See http://checkstyle.sf.net/config_sizes.html
  检查长度。文件长度(默认2000),行长度(默认80),方法长度(默认150),参数的数量(默认7)-->
        <module name="FileLength"/>
        <module name="LineLength"/>
        <module name="MethodLength"/>
        <!--<module name="ParameterNumber"/>-->


        <!-- Checks for whitespace                               -->
        <!-- See http://checkstyle.sf.net/config_whitespace.html
  检查空格,默认的均为false,不用修改。不用太关心。用jalopy美化工具后,就可以了-->
        <!--<module name="EmptyForIteratorPad"/>-->
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <!--<module name="TabCharacter"/>-->
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>


        <!-- Modifier Checks                                    -->
        <!-- See http://checkstyle.sf.net/config_modifiers.html
  检查修饰符,是否按照顺序(1. public 2. protected 3. private 4. abstract 5. static 6. final 7. transient 8. volatile 9. synchronized 10. native 11. strictfp ),
  是否在类型定义中有多余的修饰符,例:interface中,方法均不public,就不用在方法前写明public了-->
        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>


        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html
  检查语句块。嵌套的语句块,是否有空的语句块,程序块(for,else等)左括号的位置,
  程序块两端的括号,程序块(for,else等)右括号的位置-->
        <module name="AvoidNestedBlocks"/>
        <module name="EmptyBlock"/>
        <module name="LeftCurly"/>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>


        <!-- Checks for common coding problems               -->
        <!-- See http://checkstyle.sf.net/config_coding.html
  检查同一行中的条件语句,尽量不要用String b = (a==null || a.length<1) ? null : a.substring(1);
  双重检测锁定,避免同步时运行开销
  检测空语句(单独的分号;)
  检查类覆盖了equals()方法和hashCode()方法,若覆盖了equals,则要覆盖hashCode
  检查本地变量或者参数是否要隐藏在同一个类的字段当中,容易在参数中出现问题,所以去掉
  检查非法的实例化,当选用工厂方法的时候
  检查子表达式,例如在String s=Integer.toString(i=2)当中的赋值,要在语句前赋值
  检查没有”魔数”出现,所有的数字均要定义为常量,所以去掉。-1,0,1,和2不被认为是”魔数“
  检查switch语句有default子句
  检查多余的在throws语句当中异常声明,比如重复的没有检查的的异常或者一个已经声明的异常的子类.
  检查过于复杂的boolean表达式,if (b == true), b || true, !false, 等等
  检查过于复杂的boolean返回语句if (valid())  return false;else return true;修改为return !valid();-->
        <module name="AvoidInlineConditionals"/>
        <module name="DoubleCheckedLocking"/>    <!-- MY FAVOURITE -->
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <!--<module name="HiddenField"/>-->
        <module name="IllegalInstantiation"/>
        <module name="InnerAssignment"/>
        <!--<module name="MagicNumber"/>-->
        <module name="MissingSwitchDefault"/>
        <module name="RedundantThrows"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>

        <!-- Checks for class design                         -->
        <!-- See http://checkstyle.sf.net/config_design.html
  检查类设计
  检查类的扩展性,父类的空方法,要可以被子类实现,但是有的类,是可以自己写一些实现的,并不需要全部实现
  检查一个有私有构造方法的类,要为final的
  确认应用工具类(类仅仅包含静态的方法)没有一个公有的创建方法
  实现Bloch式的,根据Bloch的原则,一个接口应该定义为一个类型.因此如果定义一个接口里面不包含方法而仅仅包含常量是不合适的检查类成员的可视性,基本原理就是封装-->
        <!--<module name="DesignForExtension"/>-->
        <module name="FinalClass"/>
        <module name="HideUtilityClassConstructor"/>
        <!--<module name="InterfaceIsType"/>-->
        <module name="VisibilityModifier"/>


        <!-- Miscellaneous other checks.                   -->
        <!-- See http://checkstyle.sf.net/config_misc.html
  检查组类型变量的声明,要使用java型的,int[] someArray,不要使用C型的,int someArray[]
  要method,构造方法和catch中的参数为fianl的,不能满足
  给定义的属性的正则表达示加信息,如果没有,提示message
  todo注释,现在没有需要。让人忘记想要记住的东西,
  定义一个常量,均要用大写,没有必要-->
        <module name="ArrayTypeStyle"/>
        <!--<module name="FinalParameters"/>-->
        <module name="GenericIllegalRegexp">
            <property name="format" value="\s+$"/>
            <property name="message" value="Line has trailing spaces."/>
        </module>
        <!--<module name="TodoComment"/>
        <module name="UpperEll"/>-->

    </module>

</module>