JAX-RS 响应的 HTTP 状态为 500，而不是 HTTP 状态 400

有时，JAR-RS 客户端会发送错误的语法请求正文。服务器应响应HTTP 状态 400（错误请求） https://www.rfc-editor.org/rfc/rfc7231#section-6.5.1，但它的响应是HTTP 状态 500（内部服务器错误） https://www.rfc-editor.org/rfc/rfc7231#section-6.6.1.

Code:

JAX-B模型类别：

@XmlRootElement(namespace = "http://www.test.com/test")
@XmlAccessorType(value = XmlAccessType.FIELD)
public class TestModel {

    @XmlElement
    private String id;
}

JAX-RS资源类：

@Path("test")
public class TestResource {

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    public void create(TestModel testModel) {
        // some code
    }
}

CXF配置：

<jaxrs:server address="/rest" id="test" staticSubresourceResolution="true">
    <jaxrs:serviceBeans>
        <ref bean="testResource" /> 
    </jaxrs:serviceBeans>
    <jaxrs:providers>
        <bean class="com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider" />
    </jaxrs:providers>
</jaxrs:server>

Example:

请求正文：

{"id2": "test"}

The id2是错误的，所以客户应该得到一个HTTP 状态 400 https://www.rfc-editor.org/rfc/rfc7231#section-6.5.1，但它得到HTTP 状态 500 https://www.rfc-editor.org/rfc/rfc7231#section-6.6.1.

服务器日志：

Caused by: com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "id2" (class test.TestModel), not marked as ignorable (one known property: "id"])
    at [Source: org.apache.cxf.transport.http.AbstractHTTPDestination$1@6f30793d; line: 1, column: 10] (through reference chain: test.TestModel["id2"])
    at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:51)
    at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:839)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1045)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1352)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownVanilla(BeanDeserializerBase.java:1330)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:264)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:125)
    at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:1470)
    at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:912)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.readFrom(ProviderBase.java:811)
    at org.apache.cxf.jaxrs.utils.JAXRSUtils.readFromMessageBodyReader(JAXRSUtils.java:1343)
    at org.apache.cxf.jaxrs.utils.JAXRSUtils.readFromMessageBody(JAXRSUtils.java:1294)
    at org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameter(JAXRSUtils.java:826)
    at org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameters(JAXRSUtils.java:789)
    at org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.processRequest(JAXRSInInterceptor.java:212)
    ... 68 more

有没有办法配置 Jackson 和/或 CXF 为错误的语法请求正文返回 HTTP 状态 400，而无需模式验证 http://cxf.apache.org/docs/jax-rs-data-bindings.html#JAX-RSDataBindings-Schemavalidation or Bean验证 http://cxf.apache.org/docs/jax-rs-data-bindings.html#JAX-RSDataBindings-BeanValidation?

问题是未映射到响应的异常（通过ExceptionMapper https://jersey.java.net/documentation/latest/representations.html#d0e6665s)，转换为一般服务器错误响应，因为运行时不知道如何处理异常。

The jackson-jaxrs-provider模块有ExceptionMappers 处理 Jackson 异常基类JsonMappingException and JsonParseException。映射器是JsonMappingExceptionMapper https://github.com/FasterXML/jackson-jaxrs-providers/blob/master/base/src/main/java/com/fasterxml/jackson/jaxrs/base/JsonMappingExceptionMapper.java and JsonParseExceptionMapper https://github.com/FasterXML/jackson-jaxrs-providers/blob/master/base/src/main/java/com/fasterxml/jackson/jaxrs/base/JsonParseExceptionMapper.java， 分别。这些映射器会将异常映射到 400 响应，并将异常消息作为响应正文。如果您不喜欢这个响应体，您可以编写自己的映射器。