No Default Constructor for Entity: Why is my `principal.Cliente` Throwing an `InstantiationException` in JPA?

No Default Constructor for Entity: Revisiting principal.Cliente

In Java Persistence API (JPA), a default constructor (parameterless constructor) is essential for entities that will be persisted in the database. When encountering the error "org.hibernate.InstantiationException: No default constructor for entity" for the entity principal.Cliente, it signifies the absence of a default constructor in the entity class.

The problem's root cause lies in principal.Cliente missing the required default constructor. To resolve this, we must add a parameterless constructor to the entity class. Here's an amended version of principal.Cliente:

<code class="java">public class Cliente {
  private String name;

  public Cliente() {} // Default constructor

  public Cliente(String name) {
    this.name = name;
  }
}</code>

With this correction, the entity principal.Cliente now includes both a parameterless constructor and a constructor that accepts parameters. This will allow Hibernate to properly instantiate the entity when it encounters it in the database or when new entities are created.

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