在Spring Boot中无法将ProblemHandler设置为ObjectMapper

在Spring Boot中无法将ProblemHandler设置为ObjectMapper

无法通过或将a直接添加

DeserializationProblemHandler

到。调用构建器是不行的，因为结果对于该方法而言是本地的：Spring本身将稍后调用，从而创建另一个实例。

ObjectMapper``Jackson2ObjectMapperBuilder``Jackson2ObjectMapperBuilderCustomizer``build()``ObjectMapper``build()``ObjectMapper

但是，可以通过注册Jackson模块来做到这一点：

• 建造者有一种

  modules()

  方法
• 该模块可通过实例访问

  setupModule()

  ，该

  SetupContext

  实例具有一个

  addDeserializationProblemHandler()

  方法

然后这应该工作

@Beanpublic Jackson2ObjectMapperBuilderCustomizer customizer() {    return new Jackson2ObjectMapperBuilderCustomizer() {        @Override        public void customize(Jackson2ObjectMapperBuilder builder) { builder.modules(new MyModule());        }    };}private static class MyModule extends SimpleModule {    @Override    public void setupModule(SetupContext context) {        // Required, as documented in the Javadoc of SimpleModule        super.setupModule(context);        context.addDeserializationProblemHandler(new MyDeserializationProblemHandler());    } }private static class MyDeserializationProblemHandler extends DeserializationProblemHandler {    @Override    public boolean handleUnknownProperty(DeserializationContext ctxt,        JsonParser p,        JsonDeserializer<?> deserializer,        Object beanOrClass,        String propertyName) throws IOException {        System.out.println("ahahahaa");        return super.handleUnknownProperty(ctxt, p, deserializer, beanOrClass, propertyName);    }}