Seamus  Quitzon

Seamus Quitzon


Spring Boot - Custom Password Validator Using Passay Library

Many online web platforms require users to enter a strong password during registration. This strategy helps reduce the vulnerability of user data to any hacking.

In this article, we’ll create a simple form with a registration page. Before continuing with this tutorial, you should have a basic understanding of Java with the Spring framework.

What Is Passay ?

Passay is a Java-based password generation and validation library. It builds on the success of vt-password and provides a comprehensive and extensible feature set.

Technology Stack

  • Node.js.
  • Angular 9.
  • Spring Boot 2.
  • Maven 3.6.1.
  • JAVA 8.
  • Git.

Maven Dependency

Use Spring Initializr to generate the spring boot 2 project with the dependencies: web, lombok, spring-boot-starter-validation.

Then add the Passay dependency to manage validation policies.



You can find all versions here.

Use the UserData class containing the information to verify.


                field = "password",
                fieldMatch = "confirmPassword",
                message = "Passwords do not match!"
public class UserData {

    @NotBlank(message = "username is mandatory")
    private String username;

    private String email;

    @NotBlank(message = "New password is mandatory")
    private String password;

    @NotBlank(message = "Confirm Password is mandatory")
    private String confirmPassword;

Two important annotations:

  • @PasswordValueMatch: Check if the password and confirmation password match.
  • @ValidPassword: Contains the password validation policy.

#java #spring boot 2.2 #angular 9 #validation policy

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Spring Boot - Custom Password Validator Using Passay Library

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