Coding⏱️ 2 min read📅 2026-05-31

How to Fix: Annotations from javax.validation.constraints not working

Enable validation annotations in Java Spring application.

Quick Answer: Add @EnableWebSecurity and @Configuration to your main application class, and include the necessary dependencies in your pom.xml file.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🔧 Proven Troubleshooting Steps
  3. 🎯 Final Words

To use annotations from javax.validation.constraints, you need to configure the Bean Validation API in your application. This can be done by adding the following dependency to your pom.xml file (if you're using Maven) or your build.gradle file (if you're using Gradle):

🛑 Root Causes of the Error

  • The Bean Validation API is not enabled in your application configuration.

🔧 Proven Troubleshooting Steps

Method 1: Enabling Bean Validation API in Web Application

  1. Step 1: Add the @EnableWebMvc annotation to your Spring MVC application configuration.

Method 2: Enabling Bean Validation API in Java Configuration

  1. Step 1: Add the @EnableValidation annotation to your Spring Boot application configuration.

🎯 Final Words

By following these steps, you should be able to enable the Bean Validation API in your Spring application and use annotations from javax.validation.constraints like @Size, @NotNull, etc.

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