This section describes a tutorial example of how to use JAXP (Java API for XML Processing) to validate an XML document against a schema.
From the JAXP chapter of this book, we wrote a Java validator, XsdSchemaValidator.java, to validate XML documents again schema documents.
Now we can use it to validate the following XML document, holiday_error.xml, again the holiday.xsd schema described
in the previous section.
<?xml version="1.0"?>
<holiday country="Canada">National Day
<date>July 1</date>
</holiday>
Obviously, we are going to get several validation errors.
Here is the entire output from XsdSchemaValidator.java:
>java XsdSchemaValidator holiday.xsd holiday_error.xml
Error:
Line number: 2
Column number: 27
Message: cvc-type.3.1.1: Element 'holiday' is a simple type,
so it cannot have attributes, excepting those whose namespace
name is identical to 'http://www.w3.org/2001/XMLSchema-instance'
and whose [local name] is one of 'type', 'nil', 'schemaLocation'
or 'noNamespaceSchemaLocation'. However, the attribute,
'country' was found.
Error:
Line number: 4
Column number: 11
Message: cvc-type.3.1.2: Element 'holiday' is a simple type, so
it must have no element information item [children].
Error:
Line number: 4
Column number: 11
Message: cvc-datatype-valid.1.2.1: '' is not a valid value for
'date'.
Error:
Line number: 4
Column number: 11
Message: cvc-type.3.1.3: The value '' of element 'holiday' is
not valid.
Failed with errors: 4
I assume that you know why we are getting those errors.
