Added standard Log4j appender to stdout for examples.

Author: pmoerenhout

jsmpp-examples/src/main/resources/log4j.properties

@@ -0,0 +1,6 @@
+log4j.rootLogger=INFO, STDOUT
+
+log4j.appender.STDOUT=org.apache.log4j.ConsoleAppender
+log4j.appender.STDOUT.layout=org.apache.log4j.PatternLayout
+# Pattern to output the caller's file name and line number.
+log4j.appender.STDOUT.layout.ConversionPattern=%d [%t] %-5p %c - %m%n