Apache Maven 3.0.4发布

Apache Maven 3.0.4 发布，官方发行说明：

http://maven.apache.org/docs/3.0.4/release-notes.html

主要改进记录：

** Bug
* [MNG-4792] - Preemptive authentication doesn't work
* [MNG-5064] - mvn -nsu (--no-snapshot-updates) should not download snapshots (and break local builds)
* [MNG-5096] - <exclusion> on <dependency> with <type>test-jar</type> doesn't work in maven 3
* [MNG-5113] - NullPointerException on javadoc site generation
* [MNG-5131] - Wrong encoding for encrypted passwords
* [MNG-5135] - Regression: in some cases aggregator mojo is unable to resolve dependencies with custom packaging
* [MNG-5137] - Reactor resolution does not work for forked multi module builds
* [MNG-5149] - DefaultArtifactRepositoryFactory.createArtifactRepository overload w/layoutId passes wrong (repo) id
* [MNG-5153] - ModelMerger omits relativ path
* [MNG-5155] - 'inherited' flag of report sets ignored.
* [MNG-5157] - NPE stemming from DefaultModelBuilder.containsCoordinates
* [MNG-5163] - MavenProject.getPluginRepositories misimplemented
* [MNG-5164] - Odd <name> of central in superpom
* [MNG-5165] - Problem with scp transport (wagon-maven-plugin 1.0-beta-3, Maven 2.2.1, Ubuntu 11.04)
* [MNG-5192] - prevent ConcurrentModificationException in parallel mode -Tx when project have errors
* [MNG-5221] - Default version of m-site-p does not work (no reports)
* [MNG-5224] - REGRESSION: Injected Settings in a Mojo are missing the profiles from settings.xml
* [MNG-5225] - The default version of the maven-site-plugin as defined in the site-lifecycle must be 3.x

** Improvement
* [MNG-4112] - Set property containing the currently executing maven version.
* [MNG-5073] - ProjectBuilder.build(File,ProjectBuildingRequest) returns null project if dependency version info is missing
* [MNG-5076] - Improve SEO of documentation of lifecycle.xml
* [MNG-5119] - improve site organization of core components
* [MNG-5134] - Standard documentation for build-in properties
* [MNG-5141] - Make MojoExecutor.ensureDependenciesAreResolved public
* [MNG-5151] - use CNAME or repo to provide more stability
* [MNG-5152] - upgrade wagon to the final 1.0 version
* [MNG-5158] - Make loading of extensions from lib/ext more robust with regard to existence of ext directory
* [MNG-5159] - Extend validation of settings.xml to check for uniqueness of id elements
* [MNG-5175] - replace wagon http lightweight with wagon http 2.1
* [MNG-5200] - upgrade plugin versions in super pom
* [MNG-5201] - upgrade aether to 1.13.1 and sisu to 2.3.0

** Task
* [MNG-5046] - Remove $Id$ from sources

** Test
* [MNG-5114] - Handling unrecognized version qualifiers

** Wish
* [MNG-5118] - add aggregated javadoc

项目构建工具 Maven介绍

目前，绝大多数开发人员都把 Ant 当作 Java 编程项目的标准构建工具。遗憾的是，Ant 的项目管理工具（作为 make 的替代工具）不能满足绝大多数开发人员的需要。通过检查 Ant 构建文件，很难发现项目的相关性信息和其它元信息（如开发人员／拥有者、版本或站点主页）。

Maven 除了以程序构建能力为特色之外，还提供 Ant 所缺少的高级项目管理工具。由于 Maven 的缺省构建规则有较高的可重用性，所以常常用两三行 Maven 构建脚本就可以构建简单的项目，而使用 Ant 则需要十几行。事实上，由于 Maven 的面向项目的方法，许多 Apache Jakarta 项目现在使用 Maven，而且公司项目采用 Maven 的比例在持续增长。

Maven vs Ant

那么，Maven 和 Ant 有什么不同呢？在回答这个问题以前，我要强调一点：Maven 和 Ant 针对构建问题的两个不同方面。Ant 为 Java 技术开发项目提供跨平台构建任务。Maven 本身描述项目的高级方面，它从 Ant 借用了绝大多数构建任务。因此，由于 Maven 和 Ant 代表两个差异很大的工具，所以我将只说明这两个工具的等同组件之间的区别，如表 1 所示。

表 1. Maven vs Ant

相关开发环境下的Maven插件：http://mevenide.codehaus.org/

下载地址：http://maven.apache.org/download.html

原文链接：http://www.oschina.net/news/24961/apache-maven-3-0-4-released

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