使用rs.next()时jsp页面会出现错误?

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ResultSet answerrs = answer.answer_all(question_id);
if(answerrs!=null){
while(answerrs.next()){
Date currentTime = answerrs.getDate("Restore_date");//处理时间
}
}
jsp出现如下错误,还请高手指点:
HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: ??? Resultset: next
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)
org.apache.jsp.answer_005fquestion_jsp._jspService(answer_005fquestion_jsp.java:143)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


root cause

java.sql.SQLException: ??? Resultset: next
oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1130)
oracle.jdbc.driver.OracleResultSetImpl.next(OracleResultSetImpl.java:196)
org.apache.commons.dbcp.DelegatingResultSet.next(DelegatingResultSet.java:196)
org.apache.jsp.answer_005fquestion_jsp._jspService(answer_005fquestion_jsp.java:115)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


note The full stack trace of the root cause is available in the Tomcat logs.


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Apache Tomcat/5.0.16
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