How Can I Make Spring Use My Custom ObjectMapper for Serialization and Deserialization?

Configuring ObjectMapper in Spring

In Spring, the ObjectMapper can be configured to customize the behavior of serialization and deserialization processes. One common use case is to exclude fields from being serialized unless they are annotated with a specific annotation, such as @JsonProperty.

Problem:

When configuring the ObjectMapper to only serialize fields annotated with @JsonProperty, the NumbersOfNewEvents class still contains all attributes in the serialized JSON.

Answer:

The key to understanding this issue is that the custom CompanyObjectMapper defined in servlet.xml is not being used by Spring. The solution is to annotate the CompanyObjectMapper bean with @Configuration and define it as a bean method in a Spring configuration class. This will ensure that the custom ObjectMapper is picked up and used by Spring.

Here's an example of how to achieve this with Spring Boot:

@Configuration
public class JacksonConfiguration {

    @Bean
    public ObjectMapper objectMapper() {
        return new CompanyObjectMapper();
    }
}

This configuration overrides the default ObjectMapper bean and ensures that the custom CompanyObjectMapper is used for serialization and deserialization.

Note: The VisibilityChecker defined in the CompanyObjectMapper class has no effect on serialization using Jackson 2.4.6. To exclude fields from serialization, use the @JsonIgnore annotation instead.

The above is the detailed content of How Can I Make Spring Use My Custom ObjectMapper for Serialization and Deserialization?. For more information, please follow other related articles on the PHP Chinese website!