春季数据MVC +百里香叶：更新实体

我试图用百里香叶形式更新某个实体的某些属性。春季数据MVC +百里香叶：更新实体

我做了一个控制器，将DTO添加到模型中。这样我就不必为视图发送不必要的员工属性。

这个设置让我试图修改员工的属性（点击窗体上的编辑按钮）时出现错误：

There was an unexpected error (type=Bad Request, status=400). 
Validation failed for object='employeeDTO'. Error count: 2

显然我的设置不会因为日期和List对象的工作我有在我的DTO。

我该如何解决这个问题？我是否需要编写一些转换器？我怎么做？

是否有更简单的方法来编辑实体的属性？我的意思是比@SessionAttributes("employee")，DTO's，Mapper，Converter，...更简单的方法...这看起来很简单，但我无法实现它，我有这种感觉，我加入了很多东西（DTO，mappers，converter？，...）只是为了能够编辑实体的属性。

实体：

@Entity 
public class Employee { 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Long id; 
    private String firstName; 
    private String lastName; 
    private Date birthDate; 
    @OneToMany(fetch = FetchType.EAGER) 
    private List<Car> carHistory = new ArrayList<Car>(); 

    // constructors 

    // getters and setters 
} 

@Entity 
public class Car { 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Long id; 
    @Enumerated(EnumType.STRING) 
    private CarStatus status; 
    private String plate; 

    // constructors 
    // getters & setters 

    public enum CarStatus { 
     FREE, ORDERED, IN_USE, INACTIVE 
    } 

}

存储库：

@Repository 
public interface EmployeeRepository extends JpaRepository<Employee, Long> { 
}

服务：

@Service 
public class EmployeeService { 
    private EmployeeRepository employeeRepository; 

    @Autowired 
    public EmployeeService(EmployeeRepository employeeRepository) { 
     this.employeeRepository = employeeRepository; 
    } 

    public void updateEmployee(Employee employee){ 
     employeeRepository.saveAndFlush(employee); 
    } 
}

雇员DTO：

public class EmployeeDTO implements Serializable{ 

    private String firstName; 
    private String lastName; 
    private Date birthDate; 
    private List<Car> carHistory; 

    // getters & setters 
}

DTO映射器：

public class EmployeeMapper { 

    public static Employee mapEmployeeDTOToEmployeeObject(EmployeeDTO dto, Employee employee){ 
     employee.setFirstName(dto.getFirstName()); 
     employee.setLastName(dto.getLastName()); 
     employee.setBirthDate(dto.getBirthDate()); 
     employee.setCarHistory(dto.getCarHistory()); 
     return employee; 
    } 

    public static EmployeeDTO mapEmployeeToEmployeeObject(Employee employee){ 
     EmployeeDTO dto = new EmployeeDTO(); 
     dto.setFirstName(employee.getFirstName()); 
     dto.setLastName(employee.getLastName()); 
     dto.setBirthDate(employee.getBirthDate()); 
     dto.setCarHistory(employee.getCarHistory()); 
     return dto; 
    } 
}

电脑板：

@Controller 
@RequestMapping("/manage") 
@SessionAttributes("employee") 
public class ManageEmployeesController { 

    @Autowired 
    EmployeeService employeeService; 

    @RequestMapping("/employees") 
    public String manageEmployee(Model model){ 
     model.addAttribute("employees", employeeService.getAllEmployees()); 
     return "manage-employee"; 
    } 

    @RequestMapping(value = "/employee/{employeeId}", method = RequestMethod.GET) 
    public String employeeDetails(@PathVariable("employeeId") Long id, Model model){ 
     Employee emp = employeeService.getEmployeeById(id); 
     model.addAttribute("employee", EmployeeMapper.mapEmployeeToEmployeeObject(emp)); 
     return "manage-employee-details"; 
    } 

    @RequestMapping(value = "/employee/{employeeId}", method = RequestMethod.POST) 
    public String updateEmployeeDetails(@PathVariable("employeeId") Long id, EmployeeDTO employeeWithNewValues){ 
     Employee currentEmployee = employeeService.getEmployeeById(id); 
     employeeService.updateEmployee(EmployeeMapper.mapEmployeeDTOToEmployeeObject(employeeWithNewValues, currentEmployee)); 
     return "redirect:/fleetmanager/employees"; 
    } 
}

Thymeleaf形式：

<form role="form" method="post" th:object="${employee}"> 
    <h2>Personal details</h2> 
    <table> 
     <tr> 
      <td>First name:</td> 
      <td> 
       <input type="text" th:readonly="true" th:value="*{firstName}" th:field="*{firstName}"/> 
      </td> 
     </tr> 
     <tr> 
      <td>Last name:</td> 
      <td> 
       <input type="text" th:value="*{lastName}" th:field="*{lastName}"/> 
      </td> 
     </tr> 
     <tr> 
      <td>Birthdate:</td> 
      <td> 
       <input type="text" th:value="*{birthDate}" th:field="*{birthDate}"/> 
      </td> 
     </tr> 
     <tr th:each="car : *{carHistory}"> 
      <td th:text="${car.plate}">Plate</td> 
     </tr> 
    </table> 
    <input type="submit" value="Edit"/> 
</form>

来源

2015-11-03 Maarten Dhondt

在绑定到表单字段的模型对象中使用日期时，需要指定在HTTP请求中提交日期的格式。您需要为此定义PropertyEditor。

class DateEditor extends PropertyEditorSupport { 
    private static final String FORMAT = "MMMMM dd, yyyy"; // Or any valid date format. 

    public String getAsText() { 
    return getValue() != null 
      ? new SimpleDateFormat(FORMAT).format(getValue()) 
      : null; 
    } 

    public void setAsText(final String value) { 
    try { 
     setValue(new SimpleDateFormat(FORMAT).parse(value)); 
    } 
    catch (final ParseException e) { 
     // Log error. 
    } 
    } 
}

然后，将您的控制器配置为使用此编辑器。

public class ManageEmployeesController { 
    @InitBinder 
    public void initBinder(final WebDataBinder binder) { 
    binder.registerCustomEditor(Date.class, new DateEditor()); 
    } 
}

现在，每当Spring MVC中遇到的类型Date的形式结合域，那么就用这个PropertyEditor的转换和从String。

来源

2015-11-05 02:07:47 manish

春季数据MVC +百里香叶：更新实体

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