Using longblob in hibernate

Question

I'm new to the hibernate world and i am using it to map a table that stores files of all types. i am however recieving a very strange error :
javax.servlet.ServletException: java.lang.ClassCastException: [B cannot be cast to java.sql.Blob
I have mapped my MySql LONGBLOB column has: `<property name="fileData" type="blob" .../>` and `<property name="fileData" type="longblog" .../>` but both dont work.
I'm currently using spring mvc version 3.x the latest version and tomcant 7 if that helps.
edit: here is how my POJO looks like for fileObject:
[CODE]package com.kc.models;
public class FileObject {
     private String fileName;
     private String type;
     private double size;
     private byte[] file;
     private int id;
     public int getId() {
          return id;
     public void setId(int id) {
          this.id = id;
     public String getFileName() {
          return fileName;
     public void setFileName(String fileName) {
          this.fileName = fileName;
     public String getType() {
          return type;
     public void setType(String type) {
          this.type = type;
     public double getSize() {
          return size;
     public void setSize(double size) {
          this.size = size;
     public byte[] getFile() {
          return file;
     public void setFile(byte[] file) {
          this.file = file;
And here is how my hbm.xml file looks like:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.kc.models.FileObject" >
     <class name="com.kc.models.FileObject" table="FILES">
          <id name="id" column="ID">
               <generator class="native" />
          </id>
          <property name="fileName" type="string" column="FILENAME" />
          <property name="type" type="string" column="TYPE" />
          <property name="size" type="double" column="SIZE" />
          <property name="file" type="blob" column="FILE" />
     </class>
</hibernate-mapping>O and here is a print screen of mySql:

Answer 1

shienna17 wrote:
javax.servlet.ServletException: java.lang.ClassCastException: [B cannot be cast to java.sql.Blob
That means you're trying to cast a byte array to Blob.