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(); }}