@Valid批注未验证子对象的列表

java spring spring-mvc jsr

2022-08-31 09:41:15

主要模型类如下：

public class UserAddressesForm {

    @NotEmpty
    private String firstName;

    @NotEmpty
    private String lastName;

    private List<AddressForm> addresses;

    // setters and getters 

}

public class AddressForm {
    
    @NotEmpty
    private String customName;
    @NotEmpty
    private String city;
    @NotEmpty
    private String streetAn;
    @NotEmpty
    private String streetHn;
    @NotEmpty
    private String addressCountry;
    @NotEmpty
    private String postCode;
    
    // setters and getters
}

我的一个控制器中的端点：

@RequestMapping(value = "/up", method = RequestMethod.POST)
public String completeForm(@Valid @ModelAttribute("userAddressesForm") UserAddressesForm userAddressesForm,  
            BindingResult result, HttpServletRequest req) {

 // logic here 

}

一页：.jsp

<form:form commandName="userAddressesForm" action="registered">
    <table>

        <tr>
            <td class="formLabels"><form:label path="firstName">
                <spring:message code="label.name" />
            </form:label></td>
            <td><form:input path="firstName" /></td>
            <td><form:errors path="firstName" cssClass="error" /></td>
        </tr>
        <tr>
            <td class="formLabels"><form:label path="lastName">
                <spring:message code="label.surname" />
            </form:label></td>
            <td><form:input path="lastName" /></td>
            <td><form:errors path="lastName" cssClass="error" /></td>
        </tr>
    </table>
    
    <c:forEach items="${userAddressesForm.addresses}" varStatus="gridRow">  
        <div id="main_address" class="address_data_form">
            <fieldset>
                <legend><spring:message code="label.stepThreeMainAddressInfo" /></legend>
                <a href="#" class="deleteItem"></a>
                <table>
                    <tr>            
                        <td class="formLabels">
                            <spring:message code="label.address.custom.name" />
                        </td>
                        <td>
                            <spring:bind path="addresses[${gridRow.index}].customName">
                                <input type="input" name="<c:out value="${status.expression}"/>"
                                    id="<c:out value="${status.expression}"/>"
                                    value="<c:out value="${status.value}"/>" />
                                    <form:errors path="${status.expression}"/>
                            </spring:bind>
                        </td>   
                    </tr>               
                    <tr>            
                        <td class="formLabels">
                            <spring:message code="label.streetAnStreetHn" />
                        </td>
                        <td>
                            <spring:bind path="addresses[${gridRow.index}].streetAn">
                                <input type="input" name="<c:out value="${status.expression}"/>"
                                    id="<c:out value="${status.expression}"/>"
                                    value="<c:out value="${status.value}"/>" />
                            </spring:bind>
                            <spring:bind path="addresses[${gridRow.index}].streetHn">
                            <input type="input" name="<c:out value="${status.expression}"/>"
                                id="<c:out value="${status.expression}"/>"
                                value="<c:out value="${status.value}"/>" >
                            <form:errors path="addresses[${gridRow.index}].streetHn"/>
                            </spring:bind>
                            
                        </td>
                    </tr>
                    <tr>                        
                        <td class="formLabels">
                            <spring:message code="label.postCode" />
                        </td>
                        <td>
                            <spring:bind path="addresses[${gridRow.index}].postCode">
                                <input type="input" name="<c:out value="${status.expression}"/>"
                                    id="<c:out value="${status.expression}"/>"
                                    value="<c:out value="${status.value}"/>" />
                            </spring:bind>
                        </td>                   
                    </tr>
                    <tr>                
                        <td class="formLabels">
                            <spring:message code="label.city" />
                        </td>
                        <td>
                            <spring:bind path="addresses[${gridRow.index}].city">
                                <input type="input" name="<c:out value="${status.expression}"/>"
                                    id="<c:out value="${status.expression}"/>"
                                    value="<c:out value="${status.value}"/>" />
                                <form:errors path="addresses[${gridRow.index}].city" cssClass="error" />
                            </spring:bind>
                        </td>
                    </tr>       
                </table>    
            </fieldset>
        </div>
    </c:forEach>

为什么不在课堂上验证现在？@ValidList<AddressForm> addressesUserAddressesForm

答案 1

您需要用注释修饰的成员。请参见 JSR 303 的 3.1.3 和 3.5.1 节：Bean 验证。正如我在回答问题时所解释的那样，是否有一种标准方法可以使用带注释的方法启用JSR 303 Bean验证，这是JSR 303中注释的实际用途。addressesUserAddressesForm@Valid@Valid

编辑示例代码：休眠验证器 - 对象图。（车内乘客名单）

编辑来自 Hibernate Validator 6 参考文档：

在 6 之前的版本中，Hibernate Validator 支持对容器元素子集进行级联验证，并且是在容器级别实现的（例如，您将用于为）启用级联验证。@Valid private List<Person>Person

这仍受支持，但不建议这样做。请改用容器元素级别注释，因为它更具表现力。@Valid

例：

public class Car {

        private List<@NotNull @Valid Person> passengers = new ArrayList<Person>();

        private Map<@Valid Part, List<@Valid Manufacturer>> partManufacturers = new HashMap<>();

       //...
   }

另请参阅 Bean 验证 2.0/雅加达 Bean 验证中的新增功能。

答案 2

除了@Ritesh答案之外，约束将指示 Bean 验证程序深入研究其应用属性的类型，并验证在那里找到的所有约束。用代码回答您的问题，验证程序在看到属性约束时，将浏览类并验证内部找到的所有约束，如下所示：@Valid@ValidaddressesAddressFormJSR 303

public class UserAddressesForm {

    @NotEmpty
    private String firstName;

    @NotEmpty
    private String lastName;

    @Valid
    private List<AddressForm> addresses;

...
setters and getters 

public class AddressForm {

    @NotEmpty
    private String customName;
    @NotEmpty
    private String city;
    @NotEmpty
    private String streetAn;
    @NotEmpty
    private String streetHn;
    @NotEmpty
    private String addressCountry;
    @NotEmpty
    private String postCode;
...
setters and getters