update > java version to 1.8 close #64

Author: hengming.lhm

pom.xml

@@ -10,7 +10,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <java.version>1.7</java.version>
+        <java.version>1.8</java.version>
     </properties>
 
     <!-- Inherit defaults from Spring Boot -->