Error in Java Import statement "The import javax.validation.constraints.NotNull cannot be resolved"

Question

After developing Spring roo project, I found following errors in class:

The import javax.validation.constraints.NotNull cannot be resolved

NotNull cannot be resolved to a type

I am using STS 3.1.0.RELEASE

How can this be rectified?

Billyebilobate

Answer 1

The jar containing this class must be added to the build path of your project: http://mvnrepository.com/artifact/javax.validation/validation-api/1.0.0.GA

Outflow

Then it says "Overriding managed version 1.1.0.Final for validation-api"? What do I do – Sesquialtera

springboot already declares this dependency. This solution didn't work in my case. – Listel

Answer 2

I had the same problem. I found out that the recent versions of Spring Boot need a separate dependency for validation. I tried adding the below dependency in the pom.xml file and it worked.

<dependency> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-validation</artifactId> 
</dependency>

Nidanidaros

This solved the error that I got after upgrading Spring Boot to 2.4.1 from 2.2.5.RELEASE – Neologism

this solves the problem, just added the dependency and refreshed maven. Intellij – Ardrey

I've found this error after upgrade spring boot to 3.0.2 from 2.6, solved after add this dependency – Wingfield

Answer 3

for JDK-9 the old version of "javax.validation" is not supporting. So we should add latest version.

we will know the latest version of any jar the following way

C:\Users\username\.m2\repository\javax\validation\validation-api

The above folder should have all versions of the jar, then you can add the latest version as dependency in the pom.xml file the following way

In my case "2.0.0.final" is the latest version.

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>2.0.0.Final</version>
</dependency>

Wellordered

I updated according to my latest version and yet the problem is persistent. – Ronaldronalda

New Version: 2.0.1.Final – Ephebe

Answer 4

from Spring boot 2.3 version you have to add this dependency in your pom.xml

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

the web starters no longer contains the validation so you have to add it manually

Deanndeanna

Answer 5

If you are using SpringBoot and you are migrating to Spring Boot 3, you need to replace all your references of javax.validation with jakarta.validation.

Check the release notes of Spring Boot:

https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.0-Release-Notes

Femoral

Answer 6

Im using JDK JAVA 8 and i still had a similar problem. The error disappeared just by adding the following Sample in my pom.xml

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>2.0.1.Final</version>
</dependency>

The following artical helped me find the solution: "https://www.baeldung.com/javax-validation"

Lidia

Answer 7

I was dealing with same problem.

Here you need to import like this - import jakarta.validation.constraints.NotNull;

Instead of - import javax.validation.constraints.NotNull

and also add the following dependency in your pom.xml file.

<dependency>
        <groupId>org.hibernate.validator</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>8.0.0.Final</version>
</dependency>

Youlandayoulton

Answer 8

I had the similar problem, I added the following dependency org.springframework.boot:spring-boot-starter-validation but still had the same error. Then found that there has been change due to a migration from javax to jakarta You need to change your imports from

javax.validation.constraints.NotNull;

to

import jakarta.validation.constraints.NotNull;

Selfassured

spring boot 3 , javax replaced with jakarta, this one worked for me – Woolley

Answer 9

In addition to copying and pasting .jar en <root-project>/lib you also have to add them in Project Structure > Libraries > Classes

GL

Hibernate Validator

Horselaugh

Answer 10

Before, Gradle included this dependency by default. I don't know what happen. You have to add manually this dependence: implementation 'jakarta.validation:jakarta.validation-api:2.0.2'

Chemosmosis

Answer 11

If you are using gradle, in "build.gradle" file add the following in the "dependencies"

implementation 'org.springframework.boot:spring-boot-starter-validation'

testImplementation 'org.springframework.boot:spring-boot-starter-test'

Laoighis

Answer 12

You might want to use Jakarta validation instead of javax. As the latter is considered legacy already. Spring Boot 3 includes Jakarta lib by default.

Crier

Answer 13

I had the same error and I simply downloaded API from : https://mvnrepository.com/artifact/javax.validation/validation-api/1.0.0.GA : https://mvnrepository.com/artifact/javax.validation/com.springsource.javax.validation/1.0.0.GA

It started to work -))))))))

Sorcery

Answer 14

Intellij solution: After pasting the code below you need to close intellij (entirely) then open again.

pasted the following:

    <dependency>
         <groupId>javax.validation</groupId>
         <artifactId>validation-api</artifactId>
         <version>1.0.0.GA</version>
    </dependency>

Tragedian

Answer 15

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>1.0.0.GA</version>
</dependency>

<dependency>
    <groupId>jakarta.validation</groupId>
    <artifactId>jakarta.validation-api</artifactId>
    <version>2.0.2</version>
</dependency>

there are also following versions there.

Ron