CODEWITHSUNDEEP
javaxmljaxbmarshalling
Sandeep Jindal
Sandeep Jindal

Reputation: 15318

JAXB returns "null" string instead of null

on setting an element:

element.setValue(null)

it marshalls the XML to

<element>
 <value>null<value>
</element>

I am expecting it to be:

<element>
  <value/>
</element>

or 

 <element />

Upvotes: 0

Views: 494

Answers (4)

bdoughan
bdoughan

Reputation: 149057

JAXB does not marshal a null value as:

<foo>null</foo>

By default it will not marshal the element. If you annotate it with @XmlElement(nillable=true) the xsi:nil attribute will be used.

For More Information

Upvotes: 1

baki
baki

Reputation: 95

You have two options:

  1. set the value with an empty string and do that each time you want an empty field in the file

  2. In the getter method of value you do so:

    public String getValue(){
 if(value == null)
       return null;
 return value;
}

    In this case if you don't give a value to this field then you will have an empty element. Personnally, I prefer the first solution

Upvotes: 0

Sireesh Yarlagadda
Sireesh Yarlagadda

Reputation: 13746

Try to set to element.setValue("") , instead of null directly for the desired output.

Upvotes: 0

Asif Bhutto
Asif Bhutto

Reputation: 4014

You need to put @XmlValue annotation on getter method value

@XmlValue
public String getValue(){
}

further see How to represent null value as empty element with JAXB?

Upvotes: 0

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