fixed: codegen error for "blob" type

mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcDialect.java

@@ -38,7 +38,10 @@ public abstract class JdbcDialect implements IDialect {
             for (int i = 1; i <= columnCount; i++) {
                 Column column = new Column();
                 column.setName(columnMetaData.getColumnName(i));
-                column.setPropertyType(columnMetaData.getColumnClassName(i));
+
+                String jdbcType = columnMetaData.getColumnClassName(i);
+                column.setPropertyType(JdbcTypeMapping.getType(jdbcType));
+
                 column.setAutoIncrement(columnMetaData.isAutoIncrement(i));
 
                 //注释

mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcTypeMapping.java

@@ -0,0 +1,28 @@
+package com.mybatisflex.codegen.dialect;
+
+import com.mybatisflex.core.util.StringUtil;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class JdbcTypeMapping {
+
+    private static Map<String, String> mapping = new HashMap<>();
+
+    static {
+        mapping.put("[B", "byte[]");
+    }
+
+    public void registerMapping(Class<?> from, Class<?> to) {
+        mapping.put(from.getName(), to.getName());
+    }
+
+    public void registerMapping(String from, String to) {
+        mapping.put(from, to);
+    }
+
+    static String getType(String jdbcType) {
+        String registered = mapping.get(jdbcType);
+        return StringUtil.isNotBlank(registered) ? registered : jdbcType;
+    }
+}

mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Column.java

@@ -203,7 +203,10 @@ public class Column {
         List<String> importClasses = new ArrayList<>();
 
         //lang 包不需要显式导入
-        if (!propertyType.startsWith("java.lang.")) {
+        if (!propertyType.startsWith("java.lang.")
+                && !"byte[]".equals(propertyType)
+                && !"Byte[]".equals(propertyType)
+        ) {
             importClasses.add(propertyType);
         }