Copy/paste from servlet 3.0 spec.
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The injection-target-class specifies the fully qualified class name
that is the target of the injection. The injection-target-name specifies the
target within the specified class. The target is first looked for as a JavaBean
property name. If not found, the target is looked for as a field name. The specified
resource will be injected into the target during initialization of the class by either
calling the set method for the target property or by setting a value into the name field.