60315 -- allow 'yyyy-MM-dd' as a valid date format in metadata in OPCParser

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1767026 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/openxml4j/opc/internal/PackagePropertiesPart.java

@@ -55,6 +55,7 @@ public final class PackagePropertiesPart extends PackagePart implements
 	private final static String[] DATE_FORMATS = new String[]{
 			DEFAULT_DATEFORMAT,
 			"yyyy-MM-dd'T'HH:mm:ss.SS'Z'",
+            "yyyy-MM-dd"
 	};
 
 	//Had to add this and TIME_ZONE_PAT to handle tz with colons.
@@ -635,7 +636,7 @@ public final class PackagePropertiesPart extends PackagePart implements
 		if (date == null) {
 		   return "";
 		}
-		
+
 		SimpleDateFormat df = new SimpleDateFormat(DEFAULT_DATEFORMAT, Locale.ROOT);
 		df.setTimeZone(LocaleUtil.TIMEZONE_UTC);
 		return df.format(date);

src/ooxml/testcases/org/apache/poi/openxml4j/opc/TestPackageCoreProperties.java

@@ -94,6 +94,9 @@ public final class TestPackageCoreProperties {
         props.setCreatedProperty("2007-05-12T06:00:00-0200");
         assertEquals(dateToInsert, props.getCreatedProperty().getValue());
 
+        props.setCreatedProperty("2015-07-27");
+        assertEquals(msdf.parse("2015-07-27T00:00:00.000Z"), props.getCreatedProperty().getValue());
+
         props.setCreatedProperty("2007-05-12T10:00:00.123+0200");
         assertEquals(msdf.parse("2007-05-12T08:00:00.123Z"), props.getCreatedProperty().getValue());