java.sql.SQLException: 数据大小超出此类型的最大值: 2253

java.sql.SQLException: 数据大小超出此类型的最大值: 2253
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.ttc7.TTCItem.setArrayData(TTCItem.java:147)
at oracle.jdbc.dbaccess.DBDataSetImpl.setBytesBindItem(DBDataSetImpl.java:2461)
at oracle.jdbc.driver.OraclePreparedStatement.setItem(OraclePreparedStatement.java:1155)
at oracle.jdbc.driver.OraclePreparedStatement.setString(OraclePreparedStatement.java:1572)
at com.bjepn.news.NewsTypePO.prepareUpdateStatement(NewsTypePO.java:90)
at ess.base.po.ESSTransaction.update(ESSTransaction.java:233)
at com.bjepn.news.NewsTypeBO.updateNews(NewsTypeBO.java:59)
at com.bjepn.news.NewsTypeTask.updateNewsType(NewsTypeTask.java:84)
at com.bjepn.news.NewsTypeTask.execute(NewsTypeTask.java:19)
at ess.base.task.ESSServlet.perform(ESSServlet.java:51)
at ess.base.task.ESSServlet.doPost(ESSServlet.java:44)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:743)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
我用的是VARCHAR2（4000）的字段，急求解决方法~