diff --git a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/dynamic/db/SqlUtils.java b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/dynamic/db/SqlUtils.java
index dec76a34..751dfbe9 100644
--- a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/dynamic/db/SqlUtils.java
+++ b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/dynamic/db/SqlUtils.java
@@ -12,6 +12,10 @@ import java.util.Map;
  */
 public class SqlUtils {
 
+    private SqlUtils(){
+
+    }
+
     public static final String DATABSE_TYPE_MYSQL = "mysql";
     public static final String DATABSE_TYPE_POSTGRE = "postgresql";
     public static final String DATABSE_TYPE_ORACLE = "oracle";
@@ -30,9 +34,9 @@ public class SqlUtils {
      * 获取所有表的SQL
      */
     public static final String MYSQL_ALLTABLES_SQL = "select distinct table_name from information_schema.columns where table_schema = {0}";
-    public static final String POSTGRE__ALLTABLES_SQL = "SELECT distinct c.relname AS  table_name FROM pg_class c";
-    public static final String ORACLE__ALLTABLES_SQL = "select distinct colstable.table_name as  table_name from user_tab_cols colstable";
-    public static final String SQLSERVER__ALLTABLES_SQL = "select distinct c.name as  table_name from sys.objects c";
+    public static final String POST_GRE_ALL_TABLES_SQL = "SELECT distinct c.relname AS  table_name FROM pg_class c";
+    public static final String ORACLE_ALL_TABLES_SQL = "select distinct colstable.table_name as  table_name from user_tab_cols colstable";
+    public static final String SQL_SERVER_ALL_TABLES_SQL = "select distinct c.name as  table_name from sys.objects c";
 
     /**
      * 获取指定表的所有列名
@@ -184,11 +188,11 @@ public class SqlUtils {
             if (dbTypeIsMySQL(dbType)) {
                 return MessageFormat.format(MYSQL_ALLTABLES_SQL, params);
             } else if (dbTypeIsOracle(dbType)) {
-                return ORACLE__ALLTABLES_SQL;
+                return ORACLE_ALL_TABLES_SQL;
             } else if (dbTypeIsPostgre(dbType)) {
-                return POSTGRE__ALLTABLES_SQL;
+                return POST_GRE_ALL_TABLES_SQL;
             } else if (dbTypeIsSQLServer(dbType)) {
-                return SQLSERVER__ALLTABLES_SQL;
+                return SQL_SERVER_ALL_TABLES_SQL;
             }
         }
         return null;