PMD 5.4.2 发布 Java 程序代码检查工具

PMD 5.4.2 发布了，该版本一些提升：

A JSON-renderer for PMD which is compatible with CodeClimate. SeePR#83.
#1360: Provide backwards compatibility for PMD configuration file
CPD supports now Swift (see PR#33).
java-design/UseVargs: public static void main method is ignored now and so are methods, that are annotated with Override. See PR#79.

CLI 改进：

CPD: If a complete filename is specified, the language dependent filename filter is not applied. This allows to scan files, that are not using the standard file extension. If a directory is specified, the filename filter is still applied and only those files with the correct file extension of the language are scanned.
CPD: If no problems found, an empty report will be output instead of nothing. See also#1481
New command line parameter for PMD: -norulesetcompatibility – this disables the ruleset factory compatibility filter and fails, if e.g. an old rule name is used in the ruleset. See also#1360. This option is also available for the ant task:<noRuleSetCompatibility>true</noRuleSetCompatibility>.

PMD是一款采用BSD协议发布的Java程序代码检查工具。该工具可以做到检查Java代码中是否含有未使用的变量、是否含有空的抓取块、是否含有不必要的对象等。该软件功能强大，扫描效率高，是Java程序员debug的好帮手。

PMD支持的编辑器包括：
JDeveloper、 Eclipse、JEdit、JBuilder、BlueJ、CodeGuide、NetBeans/Sun Java Studio Enterprise/Creator、IntelliJ IDEA、TextPad、Maven、Ant,、Gel、JCreator和Emacs。

下载地址：https://github.com/pmd/pmd/releases/tag/pmd_releases%2F5.4.2