insert data into database using servlet and jsp in eclipse

Question

I am trying to add or insert values into table of database using servlet and jsp and MySQL Workbench as database  These are the following details   1   Register java  package register com   import java io IOException  import java io PrintWriter   import javax servlet ServletConfig  import javax servlet ServletException  import javax servlet annotation WebServlet  import javax servlet http HttpServlet  import javax servlet http HttpServletRequest  import javax servlet http HttpServletResponse   import java sql    import javax servlet          Servlet implementation class Register     WebServlet   register   public class Register extends HttpServlet   private static final long serialVersionUID   1L           see HttpServlet HttpServlet       public Register         super           TODO Auto-generated constructor stub                    see Servlet init ServletConfig              public void init ServletConfig config  throws ServletException              TODO Auto-generated method stub                        see HttpServlet service HttpServletRequest request  HttpServletResponse  response              protected void service HttpServletRequest request  HttpServletResponse response  throws ServletException  IOException              TODO Auto-generated method stub                        see HttpServlet doGet HttpServletRequest request  HttpServletResponse response              protected void doGet HttpServletRequest request  HttpServletResponse response  throws ServletException  IOException              TODO Auto-generated method stub                        see HttpServlet doPost HttpServletRequest request  HttpServletResponse response              protected void doPost HttpServletRequest request  HttpServletResponse response  throws ServletException  IOException              TODO Auto-generated method stub               response setContentType  text html                  PrintWriter pw   response getWriter                   String connectionURL    jdbc mysql   127 0 0 1 3306 newData     newData is the database                 Connection connection                Connection conn null              String url  jdbc mysql   localhost 3306                String dbName  userlogindb               String driver  com mysql jdbc Driver             String dbUserName  root             String dbPassword  root            try              String Fname   request getParameter  fname                String Mname   request getParameter  mname                String Lname   request getParameter  lname                String Uname   request getParameter  username                String Emailid   request getParameter  emailid                String Mobno   request getParameter  mobno                String Address   request getParameter  address                String Password1   request getParameter  password1                String Password2   request getParameter  password2                 Class forName driver  newInstance                conn   DriverManager getConnection url dbName  root    root              PreparedStatement pst   PreparedStatement  conn prepareStatement  insert into  userlogindb   registerutable  fname mname lname username emailid mobno address password1 password2  values                        try2 is the name of the table              pst setString 1 Fname               pst setString 2 Mname                     pst setString 3 Lname             pst setString 4 Uname             pst setString 5 Emailid             pst setString 6 Mobno             pst setString 7 Address             pst setString 8 Password1             pst setString 9 Password2               int i   pst executeUpdate              conn commit               String msg                if i  0                 msg  Record has been inserted               pw println   lt font size  6  color blue gt     msg     lt  font gt                                 else                msg  failed to insert the data               pw println   lt font size  6  color blue gt     msg     lt  font gt                              pst close                        catch  Exception e               pw println e                         2   index jsp   lt    page language  java  contentType  text html  charset ISO-8859-1  pageEncoding  ISO-8859-1   gt   lt  DOCTYPE html PUBLIC  -  W3C  DTD HTML 4 01 Transitional  EN                      http   www w3 org TR html4 loose dtd  gt   lt html gt   lt head gt   lt meta http-equiv  Content-Type  content  text html  charset ISO-8859-1  gt   lt title gt Insert title here lt  title gt   lt  head gt   lt body gt   lt form name  registrationform  action  register  method  post  gt   lt p gt  Enter your first name   lt input type  text  name  fname  gt  lt br gt  Enter your middle name   lt input type  text  name  mname  gt  lt br gt  Enter your last name   lt input type  text  name  lname  gt  lt br gt   lt  p gt  lt br gt   lt p gt  Enter username   lt input type  text  name  username  gt  lt br gt   lt  p gt  lt br gt   lt p gt  Enter email id   lt input type  text  name  emailid  gt  lt br gt  Enter mobile number   lt input type  text  name  mobno  gt  lt br gt  Enter address   lt textarea rows  5  cols  5  name  address  gt  lt  textarea gt  lt br gt   lt  p gt  lt br gt   lt p gt  Enter the password   lt input type  password  name  password1  gt  lt br gt  Reenter the password   lt input type  password  name  password2  gt  lt br gt   lt  p gt  lt br gt   lt p gt   lt input type  submit  gt   lt  p gt  lt br gt   lt  form gt   lt  body gt   lt  html gt    3   web xml   lt  xml version  1 0  encoding  UTF-8   gt   lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xmlns  http   java sun com xml ns javaee  xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 3 0 xsd  id  WebApp ID  version  3 0  gt   lt display-name gt RegisterExample lt  display-name gt   lt welcome-file-list gt   lt welcome-file gt index html lt  welcome-file gt   lt welcome-file gt index htm lt  welcome-file gt   lt welcome-file gt index jsp lt  welcome-file gt   lt welcome-file gt default html lt  welcome-file gt   lt welcome-file gt default htm lt  welcome-file gt   lt welcome-file gt default jsp lt  welcome-file gt   lt  welcome-file-list gt   lt servlet gt   lt description gt Register Servlet lt  description gt   lt display-name gt Register lt  display-name gt   lt servlet-name gt Register lt  servlet-name gt   lt servlet-class gt register com Register lt  servlet-class gt     lt  servlet gt   lt servlet-mapping gt   lt servlet-name gt Register lt  servlet-name gt   lt url-pattern gt  register lt  url-pattern gt   lt  servlet-mapping gt   lt  web-app gt    4   I have added mysql-connector-java-5 0 8-bin jar and servlet-api-3 0 jar is anything else needed to add it  I have created a connection to database in Data Source Explorer   When I m compiling or debuging it shows no error  During runtime also there is no error  When I fill in the form and submit it shows only blank screen    No output is displayed     Also in the database values are not updated    Please help me  I m getting hangover with this snippet

User · Accepted Answer

Check that doPost   method of servlet is called from the jsp form and remove conn commit

User · Answer

Can you check value of i by putting logger or println    and check with closing db conn at the end  Rest your code looks fine and it should work

User · Answer

Same problem fetch main problem in  PreparedStatement use simple statement then you successfully insert record same use below   String  st2  insert into  user gender name address telephone fax email       destination sdate edate Participant hcategory       Culture Nature People Cities Beaches Festivals username password   values    gender       name       address       phone       fax               email       desti       sdate       edate       parti               hotel       chk1       chk2       chk3       chk4               chk5       chk6       user       password         int i stm executeUpdate st2

User · Answer

Remove conn commit from Register java  In your jsp change action to   lt form name  registrationform  action  Register  method  post  gt

User · Answer

I had a similar issue and was able to resolve it by identifying which JDBC driver I intended to use  In my case  I was connecting to an Oracle database   I placed the following statement  prior to creating the connection variable   DriverManager registerDriver  new oracle jdbc driver OracleDriver

User · Answer

String user   request getParameter  uname    out println user    String pass   request getParameter  pass    out println pass    Class forName   com mysql jdbc Driver     Connection conn   DriverManager getConnection   jdbc mysql   localhost 3306 rental   root   root      out println  hello    Statement st   conn createStatement    String sql    insert into login  user pass  values      user           pass         st executeUpdate sql

User · Answer

In your JSP at line  lt form gt  tag  try this code   lt form name  registrationform  action  Register  method  post  gt

[java] insert data into database using servlet and jsp in eclipse

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