图像存储 unsupported data conversion问题。
原因如下：
microsoft SQL驱动默认支持Blob(图像)及Clob(大型文本数据)的存储，却不能读取，发现需要替换为Microsoft SQL Server(jTDS driver)这个驱动。
解决方法：
jtds-0.6.jar下载：http://prdownloads.sourceforge.net/jtds/jtds-0.6.jar?download
把项目中的驱动换下就行了。
我本人是在MyEclipse上解决的：
在MyEclipse的DB Browser中New个 Database Driver ，
Driver template:Microsoft SQL Server(jTDS driver)
Driver name:net.sourceforge.jtds.jdbc.Driver
Connection url :jdbc:jtds:sqlserver://219.228.230.7:1433/book (book为数据库名)
user name :sa
password:
Driver jars->add jars->把刚才下的jtds-0.6.jar选中
勾选Save password复选框。
修改hibernate.cfg.xml文件中的驱动和URL
本文来自CSDN博客，转载出处：http://blog.csdn.net/fireinjava/archive/2008/02/19/2104536.aspx
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