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To include a CDATA string in a KMZ file using SimpleXML in Java, you can use the @Text(required=false) annotation along with the CDATA class. Here is an example code snippet:

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
import org.simpleframework.xml.Text;

@Root(name="MyKmzFile")
public class MyKmzFile {

    @Element(name="description")
    private CDATA<String> description;

    public MyKmzFile(String description) {
        this.description = new CDATA<String>(description);
    }

    public static void main(String[] args) {
        MyKmzFile kmzFile = new MyKmzFile("<p>This is a CDATA string</p>");
        // Now you can use SimpleXML to serialize the kmzFile object to a KMZ file
    }

    // CDATA class to wrap the string in CDATA tags
    public static class CDATA<T> {

        @Text(required=false) // Set required=false to prevent null pointer exceptions
        private T content;

        public CDATA(T content) {
            this.content = content;
        }

        @Override
        public String toString() {
            return "<![CDATA[" + content + "]]>";
        }
    }
}

In this example, we create a MyKmzFile object with a CDATA string passed to the constructor. The description field is annotated with @Element(name="description") to indicate that it should be serialized as an XML element with the tag name "description". The CDATA string is wrapped in a CDATA class, which overrides the toString() method to insert the necessary CDATA tags around the string content.

When we serialize the kmzFile object to a KMZ file using SimpleXML, the description field will be included as an XML element with the CDATA string enclosed in the appropriate tags.