Home Discussion Discuss: JSP CRUD Application

  • The code is throwing null pointer exception . Prag Tyagi May 22, 2013 at 3:02 PM

    The code is throwing null pointer exception when clicking on the View-All records button . Exception :- java.lang.NullPointerException net.roseindia.dao.UserDao.getAllUsers(UserDao.java:71) net.roseindia.handler.UserHandler.doGet(UserHandler.java:66) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) Also the addition button is not working . There an error is coming :- java.lang.NullPointerException net.roseindia.dao.UserDao.addUser(UserDao.java:26) net.roseindia.handler.UserHandler.doGet(UserHandler.java:39) net.roseindia.handler.UserHandler.doPost(UserHandler.java:76) javax.servlet.http.HttpServlet.service(HttpServlet.java:641) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) Please suggest me as soon as possible on these errors

  • a questionmiral March 11, 2013 at 9:15 PM

    Thanks, it was very helpful for beginners such as me but can you tell me how to control what the user writes in the textfields? I can do it with a javascript code but i prefer that it will be in a class model (because we are working with the mvc).

  • reFraise March 10, 2013 at 4:10 PM

    Thanks, it is very helpful even if you have used the get method instead of the post method in the servlet class which is not very secure. But it is clear and simple.

  • list not displayingpallavi September 13, 2013 at 12:40 PM

    when i am adding the user i am not able to see the displayed result by using the same code. i am using oracle and all credentials have been set. there are no errors but once i add the msg of added successfully is displaying but not the list.

  • pls provide the solution for my errorkavi October 24, 2013 at 9:33 AM

    after running my user.jsp file i got this error pls provide the solution HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException ConnectionProcess.UserDao.addUser(UserDao.java:29) HandlerProcess.UserHandler.doGet(UserHandler.java:41) HandlerProcess.UserHandler.doPost(UserHandler.java:87) javax.servlet.http.HttpServlet.service(HttpServlet.java:637) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.33 logs.

  • pls provide the solutoionKAVI October 24, 2013 at 9:51 AM

    after running the user.jsp i got this error ....pls provide the solution HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException ConnectionProcess.UserDao.addUser(UserDao.java:29) HandlerProcess.UserHandler.doGet(UserHandler.java:41) HandlerProcess.UserHandler.doPost(UserHandler.java:87) javax.servlet.http.HttpServlet.service(HttpServlet.java:637) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.33 logs.

  • edit page not displayMangesh Mandavgane January 7, 2014 at 3:44 PM

    I have done Select,delete and add operation successfully but when trying to doing edit(update) it will not open the edit.jsp...

  • Exception in Coderakesh January 29, 2014 at 11:29 PM

    Hi, i am Rakesh ,I was downloaded code(Curd jsp servlet jdbc) from ur tutorial , While running this code inside server I got Exception like.. java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver Jan 29, 2014 10:58:42 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at info.dao.UserDao.getAllUsers(UserDao.java:71) at org.apache.jsp.listUser_jsp._jspService(listUser_jsp.java:70) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 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:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 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:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Unknown Source) pls replay how i can resolve this exception Thanks & regards Rakesh

  • askthe employe March 5, 2014 at 12:52 PM

    Hi, when I try to run my project it seems ok, but when i clik button submit the page directly go to here : HTTP Status 500 - type Exception report message description The server encountered an internal error that prevented it from fulfilling this request. exception java.lang.NullPointerException net.roseindia.dao.UserDao.getAllUsers(UserDao.java:75) net.roseindia.handler.UserHandler.doGet(UserHandler.java:76) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) please help me.. thanks

  • asktrank March 10, 2014 at 11:17 AM

    good tutorial, may i know, how to set combo box to save in database? because in your tutorial at user.jsp, just using input type = "text". can you give me some example for combo box? Thnks

  • error when submit is pressedSanketh March 11, 2014 at 1:09 PM

    Error 404: javax.servlet.UnavailableException: SRVE0200E: Servlet [net.roseindia.handler.UserHandler]: Could not find required class - net/roseindia/handler/UserHandler i am getting this error after step 2 step that is when i press submit after filling the form.

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