How to set a default value when a field is null in jibx binding?

问题

I would like to set a default constant value to a particular value node in JiBX when the corresponding field value is null. Is this possible and if so, how?

回答1:

You can use the element 'default' ... for example:

<value name="YourElementName" field="fieldName" default="default-value" usage="optional" />

This is only allowed for 'optional' elements.

See the description here: http://jibx.sourceforge.net/details/binding-attributes.html#string

来源：https://stackoverflow.com/questions/6250615/how-to-set-a-default-value-when-a-field-is-null-in-jibx-binding