bug fixed for Not EXPR

src/test/java/com/alibaba/druid/bvt/utils/JdbcUtilsTest2.java

@@ -0,0 +1,15 @@
+package com.alibaba.druid.bvt.utils;
+
+import org.junit.Assert;
+
+import com.alibaba.druid.util.JdbcConstants;
+import com.alibaba.druid.util.JdbcUtils;
+
+import junit.framework.TestCase;
+
+
+public class JdbcUtilsTest2 extends TestCase {
+    public void test_get_0() throws Exception {
+        Assert.assertEquals(JdbcConstants.ORACLE_DRIVER, JdbcUtils.getDriverClassName("JDBC:oracle:"));
+    }
+}