improve JdbcUtils

pom.xml

@@ -414,5 +414,12 @@
 			<version>4.1.4.Final</version>
 			<scope>test</scope>
 		</dependency>
+
+		<dependency>
+			<groupId>commons-dbutils</groupId>
+			<artifactId>commons-dbutils</artifactId>
+			<version>1.5</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>

src/main/java/com/alibaba/druid/util/JdbcUtils.java

@@ -649,7 +649,7 @@ public final class JdbcUtils {
             return null;
         }
     }
-
+    
     public static void insertToTable(DataSource dataSource, String tableName, Map<String, Object> data)
                                                                                                        throws SQLException {
         Connection conn = null;