@Valid @RequestBody give由以下引起：javax.el.E​​LException：找不到提供者com.sun.el.E​​xpressionFactoryImpl

Question

我面临一个Spring验证的奇怪问题。我正在尝试使用Integration测试来使用Spring anotation验证bean。但是下面是我面临的不同实现的问题。

1）当我尝试@Valid @RequestBody TaskApprovalDetails taskApprovalDetails（TaskApprovalDetails是我的bean）时，我得到以下异常

引起：javax.el.E​​LException：找不到提供者com.sun.el.E​​xpressionFactoryImpl     在javax.el.FactoryFinder.newInstance（FactoryFinder.java:101）     在javax.el.FactoryFinder.find（FactoryFinder.java:197）     在javax.el.E​​xpressionFactory.newInstance（ExpressionFactory.java:197）     在javax.el.E​​xpressionFactory.newInstance（ExpressionFactory.java:168）     在org.hibernate.validator.internal.engine.messageinterpolation.InterpolationTerm。（InterpolationTerm.java:59）

Please note without @Valid, @RequestBody is able to map my json to taskApprovalDetails.

2）当我尝试@Valid @ModelAttribute（＆＃34; taskApprovalDetails＆＃34;）TaskApprovalDetails taskApprovalDetails我没有得到任何异常。我能够访问我的控制器，但taskApprovalDetails对象中的所有属性都为null。 @ModelAttribute无法将我的请求json映射到objet

以下是一些示例代码：

控制器：

@RequestMapping(value = "/{taskId}/{customerId}/accept", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseStatus(OK)
public void acceptTask(@PathVariable String taskId, @PathVariable String customerId, @RequestParam("user") String user,
                    @Valid @ModelAttribute("taskApprovalDetails") TaskApprovalDetails taskApprovalDetails) throws URISyntaxException, ParseException {
        inboxService.acceptTask(taskApprovalDetails, user, taskId, customerId);
}

或

@RequestMapping(value = "/{taskId}/{customerId}/accept", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
@ResponseStatus(OK)
public void acceptTask(@PathVariable String taskId, @PathVariable String customerId, @RequestParam("user") String user,
               @Valid @RequestBody TaskApprovalDetails taskApprovalDetails) throws URISyntaxException, ParseException {
        inboxService.acceptTask(taskApprovalDetails, user, taskId, customerId);
}   

JSON

public static String mockJsonRequestBody(final String customerId, final String role) {
     return "{\"comments\":\"Click\",\"role\":\"User\",\"userId\":\"asdasdasd\"}";
}

TaskApprovalDetails.class

@JsonInclude(NON_NULL)
public class TaskApprovalDetails {

    private int rowId;
    private String role;
    @NotBlank
    @Size(min=20, max = 25)
    private String userId;
    private Date taskCreatedDate;
    private Date taskCompletedDate;
    private String decision;
    private BigDecimal level;
    @Size(min = 20, max = 25, message = "Comments can be between 20-25 char only.")
    private String comments;
    private String rejectedSection;
    private List<String> businessRestriction;

请告诉我哪种方法可以验证bean的最佳方法。 @ModelAtrubute或@RequestBody以及如何解决上述问题。