我已经使用iText将表格内容导出为pdf。
这是我的代码：
JSP:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Export to Excel - Demo</title> <script src="scripts.js"></script> <script language="javascript"> function exportToExcel() { $("#datatoexport").val($("#customers").html()); $('#myForm').submit(); } </script> </head> <body> <form id="myForm" action="Sample" method="post"> <div id="customers"> <table id="exportTableSelector" align="left" border="2"> <thead> <tr bgcolor="lightgreen"> <th>Sr. No.</th> <th>Text Data</th> <th>Number Data</th> </tr> </thead> <tbody> <% for (int i = 0; i < 10; i++) { %> <tr bgcolor="lightblue"> <td align="center"><%=i + 1%></td> <td align="center">This is text data <%=i%></td> <td align="center"><%=i * i%></td> </tr> <% } %> </tbody> </table> </div> <br><br> <p> some text </p> <textarea name="datatoexport" id="datatoexport"></textarea> <a href="" onclick="exportToExcel();" target="_blank">Export to Excel</a> </form> </body> </html>
Servlet:
import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Paragraph; import com.itextpdf.text.pdf.PdfWriter; /** * Servlet implementation class Sample */ public class Sample extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Sample() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub System.out.println("Inside doGet"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub System.out.println("Inside doPost"); try { // Get the text that will be added to the PDF String text = request.getParameter("datatoexport"); if (text == null || text.trim().length() == 0) { text = "You didn't enter any text."; } // step 1 Document document = new Document(); // step 2 ByteArrayOutputStream baos = new ByteArrayOutputStream(); PdfWriter.getInstance(document, baos); // step 3 document.open(); // step 4 document.add(new Paragraph(text)); // step 5 document.close(); // setting some response headers response.setHeader("Expires", "0"); response.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0"); response.setHeader("Pragma", "public"); // setting the content type response.setContentType("application/pdf"); // the contentlength response.setContentLength(baos.size()); // write ByteArrayOutputStream to the ServletOutputStream OutputStream os = response.getOutputStream(); baos.writeTo(os); os.flush(); os.close(); } catch(DocumentException e) { throw new IOException(e.getMessage()); } } }
用过itextpdf-5.1.0.jar这是我的JSP页面。
从jsp获取字符串时，
String text = request.getParameter("datatoexport");
我得到的内容与表td tr…相同，而不是实际值。 有什么帮助吗？
请看一下示例ParseHtmlTable1和ParseHtmlTable2。 他们创建以下PDF：html_table_1.pdf 和html_table_2.pdf 。
该表是这样创建的：
StringBuilder sb = new StringBuilder(); sb.append("<table border=\"2\">"); sb.append("<tr>"); sb.append("<th>Sr. No.</th>"); sb.append("<th>Text Data</th>"); sb.append("<th>Number Data</th>"); sb.append("</tr>"); for (int i = 0; i < 10; ) { i++; sb.append("<tr>"); sb.append("<td>"); sb.append(i); sb.append("</td>"); sb.append("<td>This is text data "); sb.append(i); sb.append("</td>"); sb.append("<td>"); sb.append(i); sb.append("</td>"); sb.append("</tr>"); } sb.append("</table>");
我自由地定义了CSS，如下所示：
tr { text-align: center; } th { background-color: lightgreen; padding: 3px; } td {background-color: lightblue; padding: 3px; }
在另一个答案中，已经提到您的设计存在缺陷。您 应该学习如何创建一个体面的体系结构。分隔数据（例如 表格）和样式（例如颜色）是您可以改进的一个示例。
现在，我们像这样解析CSS和HTML：
CSSResolver cssResolver = new StyleAttrCSSResolver(); CssFile cssFile = XMLWorkerHelper.getCSS(new ByteArrayInputStream(CSS.getBytes())); cssResolver.addCss(cssFile); // HTML HtmlPipelineContext htmlContext = new HtmlPipelineContext(null); htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory()); // Pipelines ElementList elements = new ElementList(); ElementHandlerPipeline pdf = new ElementHandlerPipeline(elements, null); HtmlPipeline html = new HtmlPipeline(htmlContext, pdf); CssResolverPipeline css = new CssResolverPipeline(cssResolver, html); // XML Worker XMLWorker worker = new XMLWorker(css, true); XMLParser p = new XMLParser(worker); p.parse(new ByteArrayInputStream(sb.toString().getBytes()));
现在elements列表包含一个元素：您的表：
return (PdfPTable)elements.get(0);
您可以将此表添加到PDF文档中
