[MJAR-170] please add property 'maven.jar.classifier'
Submitted by ryenus
from https://github.com/apache/maven-plugins/pull/13

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1525834 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/maven/plugin/jar/JarMojo.java b/src/main/java/org/apache/maven/plugin/jar/JarMojo.java
index 15a161f..ba95fbf 100644
--- a/src/main/java/org/apache/maven/plugin/jar/JarMojo.java
+++ b/src/main/java/org/apache/maven/plugin/jar/JarMojo.java
@@ -48,7 +48,7 @@
      * If this is not given,it will merely be written to the output directory
      * according to the finalName.
      */
-    @Parameter
+    @Parameter( property = "maven.jar.classifier", defaultValue = "" )
     private String classifier;
 
     protected String getClassifier()