org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Covid19TrackerApplication.class);
}

}

javax.persistence.Table;

import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Parameter;

@Entity
@Table(name = "t_user")
public class User {

private String id;
private String username;

@Id
@Column(name = "id", length = 32)
@GeneratedValue(generator = "system-uuid") //指定生成器名称
@GenericGenerator(name = "system-uuid", strategy = "uuid") //生成器名称，uuid生成类
public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {