如何捕获RESTEasy Bean验证错误? [英] How to catch RESTEasy Bean Validation Errors?
问题描述
我正在使用JBoss-7.1和RESTEasy开发一个简单的RESTFul服务. 我有一个称为CustomerService的REST服务,如下所示:
I am developing a simple RESTFul service using JBoss-7.1 and RESTEasy. I have a REST Service, called CustomerService as follows:
@Path(value="/customers")
@ValidateRequest
class CustomerService
{
@Path(value="/{id}")
@GET
@Produces(MediaType.APPLICATION_XML)
public Customer getCustomer(@PathParam("id") @Min(value=1) Integer id)
{
Customer customer = null;
try {
customer = dao.getCustomer(id);
} catch (Exception e) {
e.printStackTrace();
}
return customer;
}
}
在这里,当我点击url http://localhost:8080/SomeApp/customers/-1 ,那么@Min约束将失败并在屏幕上显示堆栈跟踪.
Here when I hit the url http://localhost:8080/SomeApp/customers/-1 then @Min constraint will fail and showing the stacktrace on the screen.
是否可以捕获这些验证错误,以便我可以准备带有正确错误消息的xml响应并显示给用户?
Is there a way to catch these validation errors so that I can prepare an xml response with proper error message and show to user?
推荐答案
您应使用异常映射器.示例:
You should use exception mapper. Example:
@Provider
public class ValidationExceptionMapper implements ExceptionMapper<javax.validation.ConstraintViolationException> {
public Response toResponse(javax.validation.ConstraintViolationException cex) {
Error error = new Error();
error.setMessage("Whatever message you want to send to user. " + cex);
return Response.entity(error).status(400).build(); //400 - bad request seems to be good choice
}
}
其中错误可能类似于:
@XmlRootElement
public class Error{
private String message;
//getter and setter for message field
}
然后,您将获得包装为XML的错误消息.
Then you'll get error message wrapped into XML.
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