java.sql.SQLException: Illegal operation on empty result set
at com.mysql.jdbc.ResultSet.checkRowPos(ResultSet.java:3616)
at com.mysql.jdbc.ResultSet.getString(ResultSet.java:1758)
at com.mysql.jdbc.ResultSet.getString(ResultSet.java:1822)
at _111._first_0semester._showdetail__jsp._jspService(/111/first_semester/showdetail.jsp:151)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.subservice(Page.java:506)
at com.caucho.server.http.FilterChainPage.doFilter(FilterChainPage.java:182)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:246)
at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:163)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:595)