Json Spring：如何在ArrayList中验证bean

我有以下映射处理程序：

@Controller
@RequestMapping("/product")
public class ProductController {

    @RequestMapping(value = "update", method = RequestMethod.POST)
    @ResponseBody
    public Map<String, ?> update(@Valid @RequestBody ListOfProduct productList) {

        if (productDao.saveOrUpdateAll(productList)) {
                return jsonUtils.statusMessage(true, "Updated successfully.");
            }

        return jsonUtils.statusMessage(false, "Failed.");
    }

    @ExceptionHandler
    @ResponseStatus(value = HttpStatus.BAD_REQUEST)
    @ResponseBody
    public String handleMethodArgumentNotValidException(MethodArgumentNotValidException error) {
        return "Bad request: " + error.getMessage();
    }

    public static class ListOfProduct extends ArrayList<Product> {
        private static final long serialVersionUID = 1L;

        public ListOfProduct() {
            super();
        }
    }
}

@Entity
public class Product implements Serializable {
    private static final long serialVersionUID = 1L;

    @Min(1)
    private int id;

    @NotNull
    @Size(min = 5)
    private String name;

    public product() {
    }

        // getters and setters
}

它应该违反“name”属性的constraint@Size

它应该由控制器内部的handleMethodArgumentNotValidException（）处理

但是，我得到了一个例外：

Jan 21, 2012 10:25:00 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [appServlet] in context with path [/WebTest] threw exception [Request processing failed; nested exception is javax.validation.ConstraintViolationException: Validation failed for classes [com.tes.web.entity.Product] during update time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='size must be between 5 and 2147483647', propertyPath=name, rootBeanClass=class com.tes.web.entity.Product, messageTemplate='{javax.validation.constraints.Size.message}'}
]] with root cause
javax.validation.ConstraintViolationException: Validation failed for classes [com.tes.web.entity.Product] during update time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='size must be between 5 and 2147483647', propertyPath=name, rootBeanClass=class com.tes.web.entity.Product, messageTemplate='{javax.validation.constraints.Size.message}'}
]

有什么建议可以解决这个问题吗

---

非常感谢。

日志中的异常是一个

javax.validation.ConstraintViolationException

，但您的异常处理程序是针对异常类型

MethodArgumentNotValidException

。我认为您应该尝试在@RequestBody上声明

ConstraintViolationException

@的处理程序有效，这确实会导致MethodArgumentNotValidException。尝试在RequestResponseBodyMethodProcessor第74行中插入中断符。如果您认为有问题，请在JIRA中报告。

是的，您是对的。但是它应该抛出

MethodArgumentNotValidException

。如果抛出

ConstraintViolationException

而不是

MethodArgumentNotValidException

，这意味着

update（）

方法中的

@Valid

注释是无用的（验证不是通过spring完成的）。除非您不是通过其他方式调用验证，否则我认为验证实际上是由spring触发的（请注意，Spring MVC也在3.0.x中执行了由

@Valid

触发的验证，而

MethodArgumentNotValidException

刚刚在Spring 3.1中引入）。我无法告诉thoughm哪个配置/设置导致抛出哪个异常。

Jan 21, 2012 10:25:00 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [appServlet] in context with path [/WebTest] threw exception [Request processing failed; nested exception is javax.validation.ConstraintViolationException: Validation failed for classes [com.tes.web.entity.Product] during update time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='size must be between 5 and 2147483647', propertyPath=name, rootBeanClass=class com.tes.web.entity.Product, messageTemplate='{javax.validation.constraints.Size.message}'}
]] with root cause
javax.validation.ConstraintViolationException: Validation failed for classes [com.tes.web.entity.Product] during update time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='size must be between 5 and 2147483647', propertyPath=name, rootBeanClass=class com.tes.web.entity.Product, messageTemplate='{javax.validation.constraints.Size.message}'}
]