I am currently working on Spring MVC web app and trying to hook up validation using the @Valid annotation. When I fire up the application I'm getting the following exception:
javax.validation.ValidationException: Unable to find a default provider
I have Hibernate Validator 3.1.0.GA on the classpath as well as javax validation 1.0.0.GA, Hibernate Core 3.3.1.GA and Hibernate Annotations 3.4.0.GA.
Is there an incompatiblity in those versions that I'm not seeing, or can anyone think of any reason why I'm still getting this exception with Hibernate Validator on the class path?
Cheers,
Caps
See this answer : https://stackoverflow.com/a/3989936/325742
To fix, Add this maven dependency Hibernate Validator Annotation Processor.
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator-annotation-processor</artifactId>
<version>4.1.0.Final</version>
</dependency>
That's the latest stable version of that artifact, as seen from here
Let's say that you got a a NoClassDefFoundError
stating that the class org.postgresql.Driver
was not found.
Use Jarvana to search for a dependency that can provide org.postgresql.Driver
like so : http://www.jarvana.com/jarvana/search?search_type=class&java_class=org.postgresql.Driver which gives
Translate the above dependency into maven dependency format :
<dependency> <groupId>postgresql</groupId> <artifactId>postgresql</artifactId> <version>9.1-901.jdbc4</version> </dependency>
Confirm that the above is available at Maven Central by searching like this :
g:"postgresql" AND a:"postgresql"
(where g
stands for GroupID and a
stands for artifactID)
Finally, add it to your pom.xml
If you have an approximate idea of the dependency needed or can figure out the one you need given a list, then m2e's dependency search can be the quickest way of adding a dependency to your pom.xml
Steps :
A-D marked in the following snapshot :
In IntelliJ, looking up a dependency is much easier. All you need to do, is to make sure that the maven central repo has been indexed by IntelliJ like so:
And then, go into the pom, do a dep+Tab (or an Alt+Insert as shown here), and this is what you get:
If you are in a class which has an unresolved import, then the quick fix gives you an option of searching and adding the corresponding maven repo by doing an Alt+Enter on the missing Class/Package:
Awesome I say !