jwt authentication spring boot code example

Example 1: get username from jwt token request spring boot

UserDetails userDetails = (UserDetails) SecurityContextHolder.getContext().getAuthentication()
                        .getPrincipal();
String username = userDetails.getUsername();

Example 2: Spring Security JWT Authentication + PostgreSQL – RestAPIs SpringBoot + Spring MVC + Spring JPA

package com.grokonez.jwtauthentication.model;
 
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
 
import org.hibernate.annotations.NaturalId;
 
@Entity
@Table(name = "roles")
public class Role {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
 
    @Enumerated(EnumType.STRING)
    @NaturalId
    @Column(length = 60)
    private RoleName name;
 
    public Role() {}
 
    public Role(RoleName name) {
        this.name = name;
    }
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    public RoleName getName() {
        return name;
    }
 
    public void setName(RoleName name) {
        this.name = name;
    }
}

Example 3: Spring Security JWT Authentication + PostgreSQL – RestAPIs SpringBoot + Spring MVC + Spring JPA

package com.grokonez.jwtauthentication.model;
 
public enum  RoleName {
    ROLE_USER,
    ROLE_PM,
    ROLE_ADMIN
}