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.

XML

  <dependency>
      <groupId>org.passay</groupId>
      <artifactId>passay</artifactId>
      <version>1.6.0</version>
  </dependency>

You can find all versions here.

Use the UserData class containing the information to verify.

Java

@PasswordValueMatch.List({
        @PasswordValueMatch(
                field = "password",
                fieldMatch = "confirmPassword",
                message = "Passwords do not match!"
        )
})
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
@ToString
public class UserData {

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

    @NotNull
    @NotEmpty
    @Email
    private String email;

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

    @ValidPassword
    @NonNull
    @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