java向access插入blob数据问题。

java想access内插入类似文章一样的很长的内容的时候，普通String插入只能会截取掉，改成用blob插入，使用PreparedStatement.setBlob()方法提示这样的错误：
2010-5-26 9:00:34 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet addArticle threw exception
java.lang.UnsupportedOperationException
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.setBlob(JdbcOdbcPreparedStatement.java:2479)
at lsmj.ArticleManager.save(ArticleManager.java:27)
at lsmj.SaveArticleServlet.doPost(SaveArticleServlet.java:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at lsmj.CharsetEncodingFilter.doFilter(CharsetEncodingFilter.java:29)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)求各位大侠帮忙哦！