准备工作
引用pom
<!--生成pdf--> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itextpdf</artifactId> <version>5.5.11</version> </dependency> <!--中文字体--> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itext-asian</artifactId> <version>5.2.0</version> </dependency> <!--html xml 转为pdf--> <dependency> <groupId>com.itextpdf.tool</groupId> <artifactId>xmlworker</artifactId> <version>5.5.11</version> </dependency>
1. 添加表格
创建两列的表格PdfPTable table = new PdfPTable(2);
如果要划定两列的比例，在后面添加一行
table.setWidths(new float[]{1, 3});
程序会自动添加格子，由于定义了每行两列，则两组为一行
PdfPCell 为每个格子，可以定义格子的样式，前后间距，边框样式等
一定要在cell的维度设置格式，table维度是不起效果的
如果只要最外面的边框，则需要多定义一个外圈的table, 原来的table作为外圈的cell填充进去
private void createTable(Document document, Font fontBig, Font fontNormal, Font fontYellow) {try {PdfPTable tableFather = new PdfPTable(1);//为了做外圈的边框tableFather.setWidthPercentage(100);PdfPTable table = new PdfPTable(2);table.addCell(getCell("日期", 1, 1, fontYellow));table.addCell(getCell("天气", 1, 1, fontYellow));table.addCell(getCell("07.12", 1, 1, fontNormal));table.addCell(getCell("下雨", 1, 1, fontNormal));table.addCell(getCell("07.13", 1, 1, fontNormal));table.addCell(getCell("多云", 1, 1, fontNormal));Paragraph weatherParagraph = new Paragraph("天气信息", fontBig);weatherParagraph.setSpacingAfter(10);document.add(weatherParagraph);PdfPCell tableItem = new PdfPCell(table);tableItem.setBorderWidth(2f);tableItem.setBorderColor(new BaseColor(227, 230, 232));tableItem.setPadding(8f);tableFather.addCell(tableItem);document.add(tableFather);} catch (Exception ex) {}}
private PdfPCell getCell(String cellValue, int colspan, int rowSpan, Font font) {PdfPCell cell = new PdfPCell();try {cell = new PdfPCell(new Phrase(cellValue, font));cell.setBorder(Rectangle.NO_BORDER);cell.setPaddingTop(2f);cell.setRowspan(rowSpan);cell.setColspan(colspan);cell.setHorizontalAlignment(Element.ALIGN_LEFT);} catch (Exception ex) {logger.warn("Pdf getCell Exception", 0, ex);}return cell;}
类似效果图
itext生成的pdf会默认表格都在一行展示，如果展示不下，则在下一页分页展示，所以第一页展示不下会导致第一页末尾留下大段空白，很不美观。
尤其是在表格嵌套表格的情况下，之所以嵌套表格，是因为要保留最外侧的边框，去除内部的边框。
如何控制分页展示table，显得紧凑些？在add到document之前添加跨页设置
tableFather.setSplitLate(false);//跨页处理
tableFather.setSplitRows(true);
document.add(tableFather);
2. html添加
private void createHtml(Document document){try {String pocketDescription = "<html><body><p class=\"\" style=\"\">如果说荷兰是橙色的，那阿姆斯特丹就是缤纷的彩色。</p> <p class=\"\" style=\"\"><strong>游玩建议</strong><br>游玩整个阿姆斯特丹大约需2-3天</p></body></html>";Paragraph context = new Paragraph();ElementList elementList = MyXMLWorkerHelper.parseToElementList(pocketDescription, null);for (Element element : elementList) {context.add(element);}context.setSpacingBefore(10f);document.add(context);}catch (Exception ex){}}
这里由于中文的关系，需用重载parseToElementList函数
public class MyXMLWorkerHelper {public static class MyFontsProvider extends XMLWorkerFontProvider {public MyFontsProvider() {super(null, null);}@Overridepublic Font getFont(final String fontname, String encoding, float size, final int style) {try {BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);//中文字体return new Font(bfChinese, size, style);} catch (Exception ex) {return new Font(Font.FontFamily.UNDEFINED, size, style);}}}public static ElementList parseToElementList(String html, String css) throws IOException {// CSSCSSResolver cssResolver = new StyleAttrCSSResolver();if (css != null) {CssFile cssFile = XMLWorkerHelper.getCSS(new ByteArrayInputStream(css.getBytes()));cssResolver.addCss(cssFile);}// HTMLMyFontsProvider fontProvider = new MyFontsProvider();CssAppliers cssAppliers = new CssAppliersImpl(fontProvider);HtmlPipelineContext htmlContext = new HtmlPipelineContext(cssAppliers);htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());htmlContext.autoBookmark(false);// PipelinesElementList elements = new ElementList();ElementHandlerPipeline end = new ElementHandlerPipeline(elements, null);HtmlPipeline htmlPipeline = new HtmlPipeline(htmlContext, end);CssResolverPipeline cssPipeline = new CssResolverPipeline(cssResolver, htmlPipeline);// XML WorkerXMLWorker worker = new XMLWorker(cssPipeline, true);XMLParser p = new XMLParser(worker);html = html.replace("<br>", "<br/>").replace("<hr>", "<hr/>").replace("<img>", "").replace("<param>", "").replace("<link>", "");//不支持单独标签p.parse(new ByteArrayInputStream(html.getBytes()));return elements;}}
类似效果
