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QUESTION
I m new to spring-boot and I have started learning jdbc connectivity in spring-boot using JdbcTemplate. Unfortunately I am getting a null pointer exception while running the code for an insert. I am not getting any clue whether to add any property or dependency.
Here's my code :
...ANSWER
Answered 2019-Aug-25 at 19:56You are getting a null pointer in the jdbctemplate because the dao is not managed by spring, so spring cant inject in the jdbctemplate.
you cant do this LoginDao dao=new LoginDao();
then it is not managed by spring.
you need to annotate your LoginDao
class with @Component
or @Service
or any lifecycle spring annotation so that the Dao is created and managed by spring.
And then @Autowire
in the dao into your LoginController
class
QUESTION
I'm facing a problem while fetching the data from MySQL database and populating it to html select option using ajax. The value it is displaying properly for first select box, but for the second select box, it is displaying the content of first text box as well as result of second text box. Please help me to find the problem in the below code. I'm not using any framework. Its simple jsp, ajax and mysql dynamicweb project.
Tried many possible solutions
Here is my code
...ANSWER
Answered 2019-May-21 at 10:24In your ajax call you need to get the select-box
(table names) and then you need to assign that to some
Javascript
:
QUESTION
I have Eclipse as my IDE, tomcat server 9.0, MySQL all running in Windows 10.
I created a simple project to connect a simple database in MySQL, the code runs perfect when I create a JAVA PROJECT, but the same code fails when I create a servlet under Dynamic Web Project.
Here's the code, and the problem is Class.forName
...ANSWER
Answered 2017-May-01 at 11:22You get the class not found exception because those classes in the packages are not present in the WEB-INF/lib Folder.
You have to copy all the libraries or jars used/included in the project manually to the WEB-INF/lib Folder.
In this case, copy all the jar or library files needed for connecting to db to the WEB-INF/lib folder of the dynamic web project and it must work just fine.
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