Write-only properties with Jackson

Question

In my entity class, I'm trying to make a write-only field (gets ignored during serialization, but gets de-serialized normally).

@JsonProperty
@JsonSerialize(using=NullSerializer.class)
public String getPassword() {
    return password;
}

This almost gives me what I want: the JSON contains the "password" field, but the value is always null. How do I remove the field entirely?

Answer 1

Use @JsonIgnore on just the getter getPassword, instead of using the NullSerializer. Then also use @JsonProperty("password") on the setter.

This should allow password to be de-serialized, but the JSON output of serialization won't include it.

For example, a "getter" method that would otherwise denote a property (like, say, "getValue" to suggest property "value") to serialize, would be ignored and no such property would be output unless another annotation defines alternative method to use.

Answer 2

You can set access value:

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