Jakarta EE Namespace Migration Skill

Overview

Spring Boot 3.0 has upgraded from Java EE to Jakarta EE APIs for all dependencies. This is one of the most significant breaking changes and requires updating all javax.* package imports to jakarta.*.

Important: Packages such as javax.sql.* and javax.crypto.* will NOT change to jakarta.* as they are part of the Java 17+ JDK itself, not part of Java EE.

Before (Java EE)	After (Jakarta EE)
`javax.persistence.*`	`jakarta.persistence.*`
`javax.validation.*`	`jakarta.validation.*`
`javax.servlet.*`	`jakarta.servlet.*`
`javax.annotation.*`	`jakarta.annotation.*`
`javax.transaction.*`	`jakarta.transaction.*`
`javax.ws.rs.*`	`jakarta.ws.rs.*`
`javax.mail.*`	`jakarta.mail.*`
`javax.jms.*`	`jakarta.jms.*`
`javax.xml.bind.*`	`jakarta.xml.bind.*`

Example Entity Migration

java

// BEFORE (Spring Boot 2.x) - WILL NOT COMPILE in Spring Boot 3
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
}

// AFTER (Spring Boot 3.x) - REQUIRED
import jakarta.persistence.Entity;
import jakarta.persistence.Table;
import jakarta.persistence.Id;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
}

Important: Packages such as javax.sql.* and javax.crypto.* will NOT change to jakarta.* as they are part of the Java 17+ JDK itself, not part of Java EE.