Tomcat 下使用itext生成报表

深藏阁楼爱情的钟 2022-08-26 01:23 64阅读 0赞

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   <td> <p><font><strong></strong></font></p> <p>发布日期：2007-9-12 作者：未知 出处：http://www.tot.name</p> </td> 
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      1.Tomcat的安装不描述.现在假如Tomcat 安装目录为C:Tomcat 5.0,新建C:&nbsp;/Tomcat 5.0 /webapps /pdfservlet目录. 
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      &nbsp;&nbsp;&nbsp; 安装JDK&nbsp;&nbsp;&nbsp; 安装目录C:/j2sdk1.4.2_09&nbsp; 
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      &nbsp;&nbsp;&nbsp; 去 
     <a href="http://www.lowagie.com/iText/download.html" rel="nofollow"><font>http://www.lowagie.com/iText/download.html</font></a> 
     <a href="http://www.jfree.org/jfreechart/index.php" rel="nofollow"></a>下载itext1.3.0.jar,后解压 缩,将itext-1.3.0.jar 放到C: Tomcat 5.0/ webapps&nbsp;/ myServlets/ WEB-INF/&nbsp; lib下(当然还有一些必须的包如servlet.jar) 和 C:&nbsp;/ j2sdk1.4.2_09&nbsp;/ lib下.并将C:/j2sdk1.4.2_09/&nbsp;&nbsp; lib/&nbsp; &nbsp;itext-1.3.0.jar加到CLASSPATH中.确保能正确编译.(我也是一名JAVA初学者,我想起码的JAVA环境配置要会) 
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      2.下面就是itext 的例子,我在网上查过关于ITEXT的贴子,大部份都是转贴,一个贴子被一帮所谓的JAVA爱好者转了又转,难得出一份原创贴,可能那些JAVA高手有点低估我们初学者的水平,来个Helloworld字符串加到PDF中就算过了,那个在实际中没啥用.我说这些话也只是希望那些精通JAVA的人能对我们这些初学负一点责任,写一点好贴,给我们参考一下.废话不多讲,下面是代码.: 
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     <br>import java.io.IOException; 
     <br>import java.util.Date; 
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      import javax.servlet.ServletException; 
     <br>import javax.servlet.http.HttpServlet; 
     <br>import javax.servlet.http.HttpServletRequest; 
     <br>import javax.servlet.http.HttpServletResponse; 
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      import com.lowagie.text.Document; 
     <br>import com.lowagie.text.DocumentException; 
     <br>import com.lowagie.text.Paragraph; 
     <br>import com.lowagie.text.html.HtmlWriter; 
     <br>import com.lowagie.text.pdf.PdfWriter; 
     <br>import com.lowagie.text.rtf.RtfWriter; 
     <br>import com.lowagie.text.Element; 
     <br>import com.lowagie.text.PageSize; 
     <br>import com.lowagie.text.pdf.PdfPTable; 
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      /** 
     <br>&nbsp;* Hello World example as a Servlet. 
     <br>&nbsp;* 
     <br>&nbsp;* @author blowagie 
     <br>&nbsp;*/ 
     <br>public class HelloWorldServlet extends HttpServlet {&nbsp;&nbsp; 
     <br>&nbsp;&nbsp;&nbsp; /** 
     <br>&nbsp;&nbsp;&nbsp;&nbsp; * Returns a PDF, RTF or HTML document. 
     <br>&nbsp;&nbsp;&nbsp;&nbsp; * 
     <br>&nbsp;&nbsp;&nbsp;&nbsp; * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) 
     <br>&nbsp;&nbsp;&nbsp;&nbsp; */ 
     <br>&nbsp;&nbsp;&nbsp; public void doGet (HttpServletRequest request, HttpServletResponse response) 
     <br>&nbsp;&nbsp;&nbsp; throws IOException, ServletException { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;System.out.println("document.add(BigTable)"); 
     <br>&nbsp;&nbsp;// step1 
     <br>&nbsp;&nbsp;Document document = new Document(PageSize.A4.rotate(), 10, 10, 10, 10);&nbsp; //定义纸张类型及方向,页边距 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // step 1 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; try { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // step 2: we set the ContentType and create an instance of the corresponding Writer 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; response.setContentType("application/pdf"); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PdfWriter.getInstance(document, response.getOutputStream()); 
     <br>&nbsp;&nbsp;&nbsp;// step3 
     <br>&nbsp;&nbsp;&nbsp;document.open(); 
     <br>&nbsp;&nbsp;&nbsp;// step4 定义表格填充内容 
     <br>&nbsp;&nbsp;&nbsp;String[] bogusData = { "M0065920", "SL", "FR86000P", "PCGOLD", 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"119000", "96 06", "2001-08-13", "4350", "6011648299", 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"FLFLMTGP", "153", "119000.00" }; 
     <br>&nbsp;&nbsp;&nbsp;int NumColumns = 12; //定义表格列数 
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      &nbsp;&nbsp;&nbsp;PdfPTable datatable = new PdfPTable(NumColumns); //创建新表. 
     <br>&nbsp;&nbsp;&nbsp;int headerwidths[] = { 9, 4, 8, 10, 8, 11, 9, 7, 9, 10, 4, 10 }; // percentage 定义表格头宽度 
     <br>&nbsp;&nbsp;&nbsp;datatable.setWidths(headerwidths); 
     <br>&nbsp;&nbsp;&nbsp;datatable.setWidthPercentage(100); // percentage 
     <br>&nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setPadding(3); 
     <br>&nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setBorderWidth(2); 
     <br>&nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER); 
     <br>&nbsp;&nbsp;&nbsp;//以下是填充表头 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Clock #"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Trans Type"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Cusip"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Long Name"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Quantity"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Fraction Price"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Settle Date"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Portfolio"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("ADP Number"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Account ID"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Reg Rep ID"); 
     <br>&nbsp;&nbsp;&nbsp;datatable.addCell("Amt To Go "); 
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      &nbsp;&nbsp;&nbsp;datatable.setHeaderRows(1); // this is the end of the table header 
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      &nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setBorderWidth(1); 
     <br>&nbsp;&nbsp;&nbsp;for (int i = 1; i &lt; 750; i++) { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;if (i % 2 == 1) { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setGrayFill(0.9f); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;} 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;for (int x = 0; x &lt; NumColumns; x++) { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;datatable.addCell(bogusData[x]); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;} 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;if (i % 2 == 1) { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;datatable.getDefaultCell().setGrayFill(0.0f); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;} 
     <br>&nbsp;&nbsp;&nbsp;} 
     <br>&nbsp;&nbsp;&nbsp;document.add(datatable);&nbsp; //加载新表 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; catch(DocumentException de) { 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; de.printStackTrace(); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; System.err.println("document: " + de.getMessage()); 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // step 5: we close the document (the outputstream is also closed internally) 
     <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; document.close(); 
     <br>&nbsp;&nbsp;&nbsp; } 
     <br>} 
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      正确编译它,我试过了没问题,我itext&nbsp;&nbsp; REV.为1.3.0 放到C:&nbsp;&nbsp; Tomcat 5.0&nbsp;&nbsp;&nbsp; webapps&nbsp;&nbsp;&nbsp; pdfservlet&nbsp;&nbsp;&nbsp; WEB-INF&nbsp;&nbsp;&nbsp; classes 
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      2.由于是Servlet 我们创建一个WEB.XML 放到C:&nbsp; Tomcat 5.0&nbsp; webapps&nbsp;&nbsp; pdfservlet&nbsp;&nbsp; WEB-INF下 
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     <br>PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" 
     <br>" 
     <a href="http://java.sun.com/j2ee/dtds/web-app_2.2.dtd" rel="nofollow"><font>http://java.sun.com/j2ee/dtds/web-app_2.2.dtd</font></a>"&gt; 
     <br> 
     <br> 
     <br> 
     <br>HelloWorldServlet 
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     <br> 
     <br>HelloWorldServlet 
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     <br> 
     <br> 
     <br> HelloWorldServlet 
     <br> /HelloWorldServlet 
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      &nbsp; 
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      3.重新启动TOMCAT 
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      &nbsp;&nbsp; 
     <a href="http://ip地址:8080/pdfservlet/HelloWorldServlet" rel="nofollow"><font>http://IP地址:8080/pdfservlet/HelloWorldServlet</font></a> 
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      如果顺利的话你可以看到很漂亮的PDF报表 
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     <img alt="" src="http://pdfhome.hope.com.cn/article/article/1130253177843.jpg" align="left"> 
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