java操作iText创建PDF文件 抛出异常Exception in thread "main" java.lang.NullPointerException

Question

刚学IText相关操作，一直找不到解决办法，求教！

import java.io.File;
import java.io.IOException;

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

public class HolleWorld {
    public static final String DEST = "HolleWord.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();             //创建目录
        new HolleWorld().createPdf(DEST);        //生成文件
    }

    public void createPdf(String dest) throws IOException {
        //Initialize PDF writer
        PdfWriter writer = new PdfWriter(dest);

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(writer);

        // Initialize document
        Document document = new Document(pdf);

        //Add paragraph to the document
        document.add(new Paragraph("Hello World!"));

        //Close document
        document.close();
    }
}

以下是抛出完整异常代码

Exception in thread "main" java.lang.NullPointerException
at iText.HolleWorld.main(HolleWorld.java:16)

Answer 1

    File file = new File(DEST);
    file.getParentFile().mkdirs();             //创建目录
    new HolleWorld().createPdf(DEST);
看看这里的路径和权限是否有问题