更新mysql的jar包版本5.1.49

pom.xml

@@ -257,7 +257,7 @@
             <dependency>
                 <groupId>mysql</groupId>
                 <artifactId>mysql-connector-java</artifactId>
-                <version>5.1.21</version>
+                <version>5.1.49</version>
             </dependency>
             <dependency>
                 <groupId>org.codehaus.jackson</groupId>