Question

我得到了这个错误。有些解决方案说javax.transaction添加到pom.xml.I但是没有工作。有些解决方案说javaee.jar和javax.persistence.jar到我的classpath.But没有工作。所以如何我解决了吗？

用户模型

    @Entity
@Table(name="users")
public class Users implements Serializable {
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id")
    private Integer id;

    @Column(name="name")
    private String name;

    @Column(name="surname")
    private String surname;

    @Column(name="username")
    private String username;

    @Column(name="password")
    private String password;

    @Column(name="is_super_user")
    private Boolean isSuperUser;

    @Column(name="email")
    private String email;


    @Column(name="created_at")
    private Date created_at;

    @Column(name="updated_at")
    private Date updated_at;


    @PrePersist
    protected void onCreate() {
        created_at = new Date();
    }

    @PreUpdate
    protected void onUpdate() {
        updated_at = new Date();
    }//and getter&setter

userDAO的

@Repository
public class UsersDao {

    @PersistenceContext
    private EntityManager entityManager;

    public void save(Users users){
        entityManager.persist(users);
    }
}

UserDto喜欢没有这个构造函数的模型

public UsersDto(){

}

public UsersDto(Users users){
    this.id = users.getId();
    this.name = users.getName();
    this.surname = users.getSurname();
    this.email = users.getEmail();
    this.isSuperUser = users.getSuperUser();
    this.username = users.getUsername();
    this.password = users.getPassword();
}

UserResources

    @Component
@Path("/users")
public class UsersResources {
    @Autowired
    UsersService usersService;

    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public Response saveCity(UsersDto usersDto){
        Users users;

        try{
            users = usersService.saveUsers(usersDto);

        }catch (Exception e){
            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
        }
        return Response.ok(users).build();
    }
}

UserServices

    @Service
public class UsersService {

    @Autowired
    private UsersDao usersDao;

    @Transactional
    public Users saveUsers(UsersDto usersDto){

        Users users = new Users();
        users.setName(usersDto.getName());
        users.setEmail(usersDto.getEmail());
        users.setSuperUser(usersDto.getSuperUser());
        users.setSurname(usersDto.getSurname());
        users.setPassword(usersDto.getPassword());
        usersDao.save(users);

        return users;
    }

}

错误：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/SystemException
    at 
    ... 27 common frames omitted
Caused by: java.lang.NoClassDefFoundError: javax/transaction/SystemException
    at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
    at java.base/java.lang.Class.forName(Class.java:375) ~[na:na]
    at org.jboss.logging.Logger$1.run(Logger.java:2554) ~[jboss-logging-3.3.2.Final.jar:3.3.2.Final]

我的pom.xml有spring boot starter（web security jersey jpa mysql）和javax.transaction

那我该如何解决？

Answer 1

您在javax:javaee-web-api:6.0文件中将provided作为pom.xml范围依赖关系。这说明您希望它在运行时由容器提供。 NoClassDefFoundException似乎表明它没有在运行时提供（也许你使用的是Tomcat而不是TomEE？）。

尝试从<scope>中的javaee-web-api依赖项中删除pom.xml元素 - 您可能只是在运行时遇到不同的错误（例如，如果您没有可用的实现），但这会让你超越这个特定的错误。

java.lang.ClassNotFoundException：javax.transaction.SystemException entityManagerFactory

1 个答案: