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JSP database connectivity

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JSP database connectivity

 
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  #1
Sep 9th, 2009
Hello.
I was studying the database connectivity tutorial .
I set it up with the database in MySQL.

However I tried to set it up using Netbeans6.7.1. just to see if I could get it to run. it's not working out.

Can this be setup in netbeans? I have attached the program.
at:
http://cid-b5cb457363230793.skydrive...olTutorial.zip
I also plan to try to recreate it step by step with netbeans if possible.

any feed back on what is wrong with the example setup with netbeans would be appreciated.
-ceyesumma
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Re: JSP database connectivity

 
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  #2
Sep 9th, 2009
@ceyesuma : Can this be setup in netbeans?
-- YES or NO - It may be.

But I have a suggestion for you. Read & act this tutorial throughly - JDBC(TM) Database Access
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Re: JSP database connectivity

 
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  #3
Sep 9th, 2009
@ceyesuma: Your question is confusing, if you have problems to link MySQL with NetBeans have look at this tutorial else please provide better explanation
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Re: JSP database connectivity

 
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Sep 9th, 2009
Thanks
Those links will be helpful.
I have not started the tutorial supplied on the JSP page.

I have the database connection in netbeans and I need to learn how to access it.

I was just starting the tutorial and I set up the whole project in netbeans and the package was a little different . It all seemed to compile but I get the error that it will not deploy.

I was trying to quickly get the example to run in the netbeans.

I plan on tearing the tutorial apart to understand how it is using the MVC Model 2

I guess I will start by creating a java web app using JSF1.2. Will this be a good start?
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Re: JSP database connectivity

 
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Sep 9th, 2009
Leave JSF till you get good understanding of JSP and servlets

When you getting errors please post them toether with any code they reference to...
Last edited by peter_budo; Sep 9th, 2009 at 11:27 am.
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Re: JSP database connectivity

 
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  #6
Sep 10th, 2009
As I am re-writing the jsp database connectivity tutorial I noticed there is a lot of good stuff in it.

it is setting up nice in netbeans so far.

I'll have to decide which code to use for the LoginServlet.
Thanks
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Re: JSP database connectivity

 
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  #7
Sep 16th, 2009
Topic
The topic of this question is: db_Connect does not connect.
Hello and Thank you in advance for any assistance.


System info:netbeans project,database attached or provided at:
http://cid-b5cb457363230793.skydrive...lic/school.zip



The purpose of this post is: Try to get a sql statement to work



The functionality of this code is:
JSP Syntax (Toggle Plain Text) 
  1. ·  	"SELECT u.uid, firstName, lastName, address1, address2, city, postCode, email, phone, ug.groupName as userGroup "
  2. ·  	+"FROM user u, usergroup ug WHERE uid='"+userName+"' AND password='"+password+"' AND groupName IN"
  3. ·  	+" (SELECT groupName FROM usergroup WHERE groupid =(SELECT groupid FROM usergroup_mapping WHERE uid=u.uid))";



My question concerning this code is: What is wrong with the sql statement provided in tutorial. Or a description of its function .



The errors related to this code are:
JSP Syntax (Toggle Plain Text) 
  1. Initializing Sun's JavaServer Faces implementation (1.2_04-b22-p05) for context '/school'
  2. Initialize <------------>jdbcDriver<------------>
  3. 12345678<------------>12345678
  4. SQLException:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'user u,usergroup ug WHERE uid='12345678' AND password='12345678' AND groupName I' at line 1
  5. Error on DB return
  6. java.lang.NullPointerException
  7.         at servlets.LoginServlet.doPost(LoginServlet.java:82)
  8.  



Code description:

JSP Syntax (Toggle Plain Text) 
  1.  


Thanks again.
-ceyesuma


[u]

Note:

________________________________________________________________________

Code description:

JSP Syntax (Toggle Plain Text) 
  1.  
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Re: JSP database connectivity

 
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  #8
Sep 16th, 2009
I think you are missing brackets in the sql statement, when using the in clause, somthing like this :
JSP Syntax (Toggle Plain Text) 
  1. where groupId in (1,2,3)
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Re: JSP database connectivity

 
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  #9
Sep 16th, 2009
I was told to add table qualifiers to the WHERE statement.


The whole thing is confusing. I'm not sure what
"add table qualifiers to the where statement"

means exactly.

Is it possible for someone to breakdown what it says(laymens terms) so I can start understanding how to change it?
-ceyesumma
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Re: JSP database connectivity

 
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  #10
Sep 17th, 2009
Topic
The topic of this question is:
Hello and Thank you in advance for any assistance.


System info:

Noted in previous post.


The purpose of this post is:

Display supplied stmt from above mentioned tutorial. Stmt throws an error as noted in previous post.

Display my new stmt.


Code description:supplied stmt

JSP Syntax (Toggle Plain Text) 
  1. "SELECT u.uid, firstName, lastName, address1, address2, city, postCode, email, phone, ug.groupName as userGroup "
  2. +"FROM user u, usergroup ug WHERE uid='"+userName+"' AND password='"+password+"' AND groupName IN"
  3. +" (SELECT groupName FROM usergroup WHERE groupid =(SELECT groupid FROM usergroup_mapping WHERE uid=u.uid)
  4.  

Code description: my new statement

JSP Syntax (Toggle Plain Text) 
  1. String strQuery = "SELECT u.uid, u.password,ug.groupName FROM user AS u,usergroup AS ug,usergroup_mapping AS ugm WHERE u.uid='userName' AND u.password='password' AND u.uid=ugm.uid AND ugm.groupid=ug.groupid";



My question concerning this code is:

If my new stmt produces the required field when I run it on the databases. Why doesn’t the login except username=10101010 password =StealthProject which is in the data base?


The errors related to this code are:

JSP Syntax (Toggle Plain Text) 
  1. Initializing Sun's JavaServer Faces implementation (1.2_04-b22-p05) for context '/school'
  2. Initialize <------------>jdbcDriver<------------>
  3. 10101010<------------>StealthProject
  4. Error on DB return
  5. java.lang.NullPointerException
  6.         at servlets.LoginServlet.doPost(LoginServlet.java:82)
  7.  



Thanks again.
-ceyesuma
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