使用 ant 让你愉快编程(4)

摘要: checkstyle_checks.xml, java.header

现在已经有了目录结构, 有了 build_common.xml, common.xml, usage.txt,
build.xml, build.properties 等文件, 已经可以完成大部分任务了.
现在介绍如何进行辅助任务, 比如代码检查.

代码检查在 build_common.xml 中已经有这个任务了, 但是还需要两个配置
文件配合, 还需要到这里下载 checkstyle 的 jar 包并将
它放到 work/common/lib/ 目录下.

这两个配置文件是: work/common/template/build/ 目录下的
checkstyle_checks.xml 文件和 java.header 文件
checkstyle_checks.xml 文件说明了对 java 文件应该如何进行检查,
java.header 文件指出每个 java 文件的头部构造.

. checkstyle_checks.xml 文件如下, 是借用的Johan
的源文件, 作了一点儿修改. 其中每项配置的具体说明都有给出链接, 不明白的
话可以仔细看看.

<?xml version="1.0" encoding="iso-8859-1"?><!-- Copyright 2004 Johan K�ng�d, http://dev.kanngard.net This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA--><!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN" "http://www.puppycrawl.com/dtds/configuration_1_2.dtd"><!-- Based on the Checkstyle configuration file sun_checks.xml with some minor modifications.. Checkstyle is very configurable. Be sure to read the documentation at http://checkstyle.sf.net--><module name="Checker"> <!-- 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"/> <module name="LocalVariableName"/> <module name="MemberName"> <property name="format" value="^[_A-Z][a-zA-Z0-9]*$"/> </module> <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}/build/java.header"/> <property name="ignoreLines" value="3,5,8"/> </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="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"> <property name="tokens" value="VARIABLE_DEF"/> </module> <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>

. 以下是我的 java 文件头部构造, 当然每个团队可以有自己的约定.
因为第3,5,8行是随文件的改变而改变的, 因此我忽略了对他们的检查,
这一点可以从上面的 checkstyle_checks.xml 文件中看出来.

/* * ----------------------------------------------------------- * file name : _filename_ * authors : camry([e-mail]) * created : _datetime_ * copyright : (c) 2003 Vitular Inc. All Rights Reserved. * * modifications: * * ----------------------------------------------------------- */

有的朋友可能觉得每次都在文件前写这么一个头岂不是很麻烦, 但是对于我来说,这一点非常容易就可以让 vim 做到了. 当我用 vim 新建一个 java 文件时,它会自动加入这个头部说明, 并用适当的文件名和时间替换 _filename_ 和_datetime_ 这两个参数. 如何做到这一点将来会做说明.使用这个 checkstyle 时会有这么一个麻烦的地方: 它不允许在行尾有多余的空格. 对于程序员来说, 谁在乎这么几个空格呢, 可是程序是非常严谨的:)使用vim的朋友可以在这里发现如何轻松消除行尾空格.