如何将Spring DAO方法与Managedbean对象一起使用?

时间:2018-11-08 14:32:27

标签: spring jsf managed-bean

我有这个ManagedBean:

@ManagedBean(name="studentItem")
@ViewScoped 
public class StudentBean implements Serializable {

    private static final long serialVersionUID = 1L;

    @ManagedProperty("#{StudentService}")
    private StudentService studentService;

    private int regId;
    private String firstName;
    private String lastName;

    //getters and setters


    public void saveStudent(StudentBean student) {
        //calling from xhtml to save form data

        studentService.addStudent(student);
    }
}

以及此服务的实现:

@Component
@Service("StudentService")
public class StudentServiceImpl implements StudentService {
    @Autowired
    private UserDao<Student> studentDao;
    @Override
    @Transactional
    public void addStudent(StudentBean student) {
         Student stu=new Student();
         stu.setRegId(student.getRegId());
         stu.setFirstName(student.getFirstName());
         stu.setLastName(student.getLastName());
         studentDao.addItem(stu);
    }
}

如您所见,我不得不使用DAO方法将StudentBean受管bean对象转换为Student对象类型,以将其保存在数据库中。除了丑陋地逐一复制属性之外,还有其他标准方法吗?

2 个答案:

答案 0 :(得分:1)

您违反了MVC(模型视图控制器)模式! 您有3个部分(模型=学生,视图(您的面)和控制器=学生Bean)应该是独立的。

如果我是你,我将按照以下步骤操作:

@ManagedBean(name="studentItem")
@ViewScoped 
public class StudentBean implements Serializable {
  private Student currentStudent;
  //getter/setter 

  @ManagedProperty("#{StudentService}")
  private StudentService studentService;      

  public String renderStudentForm(){
    //create a new student when you load the form
    currentStudent = new Student();
  }

  public void saveStudent(){
    studentService.addStudent(currentStudent);
  }
}

在表单视图中,您可以使用EL #{studentItem.currentStudent.name}

调用学生属性

您明白了。

答案 1 :(得分:-1)

在这种情况下,有一些实用程序可以为您提供帮助。 您可以尝试BeanUtils复制属性或DozerMapper