java 中生成pdf 文件，java生成pdf文件,用的是itext lib

java 中生成pdf 文件，java生成pdf文件,用的是itext lib

用的是itext library, 生成一个hello world pdf 文档

/* * $Id: HelloWorld.java,v 1.6 2005/05/09 11:52:44 blowagie Exp $ * $Name:  $ * * This code is part of the 'iText Tutorial'. * You can find the complete tutorial at the following address: * http://itextdocs.lowagie.com/tutorial/ * * This code is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * itext-questions@lists.sourceforge.net */package cn.outofmemory.examples.general;import java.io.FileOutputStream;import java.io.IOException;import com.lowagie.text.*;import com.lowagie.text.pdf.PdfWriter;/** * Generates a simple 'Hello World' PDF file. *  * @author blowagie */public class HelloWorld {    /**     * Generates a PDF file with the text 'Hello World'     *      * @param args no arguments needed here     */    public static void main(String[] args) {        System.out.println("Hello World");        // step 1: creation of a document-object        Document document = new Document();        try {            // step 2:            // we create a writer that listens to the document            // and directs a PDF-stream to a file            PdfWriter.getInstance(document,                    new FileOutputStream("HelloWorld.pdf"));            // step 3: we open the document            document.open();            // step 4: we add a paragraph to the document            document.add(new Paragraph("Hello World"));        } catch (DocumentException de) {            System.err.println(de.getMessage());        } catch (IOException ioe) {            System.err.println(ioe.getMessage());        }        // step 5: we close the document        document.close();    }}