How Can I Selectively Ignore Fields During JSON Serialization While Still Allowing Deserialization?

Selective @JsonIgnore for Serialization

When using JSON serialization/deserialization frameworks, it can be useful to selectively ignore certain fields for specific operations. In the case of passwords, it is often desirable to exclude them from serialized output but still allow them to be deserialized.

Provided Context

The user object being serialized and deserialized has a "password" property. @JsonIgnore has been applied to this property to prevent it from being included in serialized JSON responses. However, this also blocks the deserialization of a password, making user signup impossible.

Solution

Spring JSONView, which uses Jackson internally, provides various methods to control serialization/deserialization. For this specific scenario, two approaches are recommended:

Jackson Versions < 1.9

• Annotate Getter Method: Add @JsonIgnore to the password getter method. This can prevent the password from being serialized without affecting deserialization.

Jackson Versions >= 1.9

• ReadWrite Annotation Arguments: Use JsonProperty with access arguments to specify read or write-only access. For example:

@JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
private String password;

• Setter Annotation: Annotate the setter method for the password property with @JsonProperty without specifying an access argument. This would indicate that the property is write-only.

Additional Notes

This solution specifically targets selective exclusion for serialization while allowing deserialization. For other scenarios where deserialization masking is desired, alternative approaches may be required.

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