diff --git a/gen/src/main/java/com/gitee/gen/gen/JavaColumnDefinition.java b/gen/src/main/java/com/gitee/gen/gen/JavaColumnDefinition.java
index 28510777f41c74c843850ae9db6452ceb1a40b24..34803f3759e6d4bc305917663ff578ce1d092333 100644
--- a/gen/src/main/java/com/gitee/gen/gen/JavaColumnDefinition.java
+++ b/gen/src/main/java/com/gitee/gen/gen/JavaColumnDefinition.java
@@ -3,6 +3,7 @@ package com.gitee.gen.gen;
 import com.gitee.gen.gen.converter.ColumnTypeConverter;
 import com.gitee.gen.gen.converter.JavaColumnTypeConverter;
 import com.gitee.gen.util.FieldUtil;
+import org.springframework.util.StringUtils;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -15,6 +16,7 @@ public class JavaColumnDefinition extends ColumnDefinition {
     private static final JavaColumnTypeConverter COLUMN_TYPE_CONVERTER = new JavaColumnTypeConverter();
 
     private static final Map<String, String> TYPE_MYBATIS_MAP = new HashMap<>(64);
+
     static {
         TYPE_MYBATIS_MAP.put(TypeEnum.BIT.getType(), "BOOLEAN");
         TYPE_MYBATIS_MAP.put(TypeEnum.BOOLEAN.getType(), "BOOLEAN");
@@ -50,7 +52,11 @@ public class JavaColumnDefinition extends ColumnDefinition {
      */
     public String getJavaFieldName() {
         String fieldName = FieldUtil.underlineFilter(getColumnName());
-        return  fieldName.replaceAll("_", "");
+        if(StringUtils.isEmpty(fieldName)){
+            return fieldName;
+        }
+        fieldName = fieldName.replaceAll("_", "");
+        return fieldName.substring(0, 1).toLowerCase() + fieldName.substring(1);
     }
 
     /**
diff --git a/gen/src/main/java/com/gitee/gen/gen/TableDefinition.java b/gen/src/main/java/com/gitee/gen/gen/TableDefinition.java
index 87000af8874b10fbda7d55aa5e1e27c9cd4db0c6..6e600ad5ff110debdc6d828f92461f8b741e5e3f 100644
--- a/gen/src/main/java/com/gitee/gen/gen/TableDefinition.java
+++ b/gen/src/main/java/com/gitee/gen/gen/TableDefinition.java
@@ -109,6 +109,20 @@ public class TableDefinition {
         return false;
     }
 
+    /**
+     * 是否含有Long字段
+     *
+     * @return
+     */
+    public boolean getHasLongField() {
+        for (ColumnDefinition definition : columnDefinitions) {
+            if ("Long".equals(((JavaColumnDefinition) definition).getJavaType())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     /**
      * 获取主键信息
      *
diff --git a/gen/src/main/java/com/gitee/gen/gen/dm/DmColumnSelector.java b/gen/src/main/java/com/gitee/gen/gen/dm/DmColumnSelector.java
index fa67450a9fd54765f522c2df7e780c79b838b350..7f35e4bc576a34c27c034706dbf2ad2da5fe8ab9 100644
--- a/gen/src/main/java/com/gitee/gen/gen/dm/DmColumnSelector.java
+++ b/gen/src/main/java/com/gitee/gen/gen/dm/DmColumnSelector.java
@@ -17,7 +17,7 @@ import java.util.Set;
  */
 public class DmColumnSelector extends ColumnSelector {
 
-	private static final TypeFormatter TYPE_FORMATTER = new OracleTypeFormatter();
+	private static final TypeFormatter TYPE_FORMATTER = new DmTypeFormatter();
 
 	private static final String COLUMN_SQL = " SELECT " +
 			" atc.COLUMN_NAME FIELD, atc.DATA_TYPE TYPE, atc.DATA_SCALE SCALE, atc.DATA_LENGTH MAXLENGTH, " +
diff --git a/gen/src/main/java/com/gitee/gen/gen/dm/DmTypeFormatter.java b/gen/src/main/java/com/gitee/gen/gen/dm/DmTypeFormatter.java
index e35163f9104e6b2bd467812c48f3234064e00889..d70f1cd7b3f250c79230eb70bd2303b57db6548c 100644
--- a/gen/src/main/java/com/gitee/gen/gen/dm/DmTypeFormatter.java
+++ b/gen/src/main/java/com/gitee/gen/gen/dm/DmTypeFormatter.java
@@ -32,12 +32,12 @@ public class DmTypeFormatter implements TypeFormatter {
 
     @Override
     public boolean isInt(String columnType) {
-        return contains(Arrays.asList("int", "integer"), columnType);
+        return !isLong(columnType) && contains(Arrays.asList("int", "integer"), columnType);
     }
 
     @Override
     public boolean isLong(String columnType) {
-        return !isVarchar(columnType) && contains(Collections.singletonList("long"), columnType);
+        return !isVarchar(columnType) && contains(Collections.singletonList("bigint"), columnType);
     }
 
     @Override