iText是著名的开放源码的站点sourceforge一个项目，是用于生成PDF文档和word文档的一个java类库。通过iText不仅可以生成PDF或rtf 的文档，而且可以将XML、Html文件转化为PDF文件。

我们看下如何使用itext插入表格。

要插入表格首先要创建Table对象

如下代码创建了一个2列的表格，声明表格对象至少要指定表格对象有几列。

Table table = new Table(2);

或者：

Table table = new Table(2,3);

以上代码表示创建一个2列3行的表格。

itext中提供了很多属性，我们可以设置表格的边框，设置cellspacing，cellpadding，以及backgroundColor等属性。

声明表格之后就需要向表格中插入单元格了，需要注意itext中的table只有Cell的概念，没有行的概念，因为在声明表格时必须指定该表格由几列组成，所以不会有问题。

下面我们声明一个Cell对象：

Cell cell = new Cell("HELLO WORLD");

很简单的创建了一个单元格对象，这个单元格中有文字HELLO WORLD.

你也可以先创建一个空的单元格，然后向单元格内插入任意的元素，例如：

Cell cell = new Cell();Paragraph pHello = new Paragraph("Hello");cell.add(pHello);

如果需要还可以通过cell.setRowspan(arg0);和imgCell.setColspan(arg0)方法来设置单元格的RowSpan和ColSpan属性。

创建好Cell之后需要将Cell添加到Table中:

table.addCell(cell);

iText提供的在word文档中操作table的api很简单，下面有一个比较复杂的例子供参考：

其效果图，如下：

import java.awt.Color;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.List;
import java.util.Map;import com.lowagie.text.Cell;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.Font;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.Table;
import com.lowagie.text.rtf.RtfWriter2;
import com.lowagie.text.rtf.style.RtfFont;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;/** 学生课表导出word author:yyli Sep 15, 2010 */
public class StudentCurriculumWordAction extends ActionSupport {private static final long serialVersionUID = 2150958354251222076L;@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubreturn SUCCESS;}@SuppressWarnings( { "serial", "unchecked" })public InputStream getWordFile() throws Exception {Map<String, Object> session = ActionContext.getContext().getSession();List<StudentCurriculum> leftList = (List<StudentCurriculum>) session.get("stuCurriculumleftList");String[] stuCurriculumArray = (String[]) session.get("stuCurriculumrightArray");float totalXf = 0;/** 创建Document对象（word文档） author:yyli Sep 15, 2010 */Document doc = new Document(PageSize.A4);/** 新建字节数组输出流 author:yyli Sep 15, 2010 */ByteArrayOutputStream baos = new ByteArrayOutputStream();/** 建立一个书写器与document对象关联，通过书写器可以将文档写入到输出流中 author:yyli Sep 15, 2010 */RtfWriter2.getInstance(doc, baos);doc.open();/** 标题字体 author:yyli Sep 15, 2010 */RtfFont titleFont = new RtfFont("仿宋_GB2312", 12, Font.NORMAL,Color.BLACK);/** 正文字体 author:yyli Sep 15, 2010 */RtfFont contextFont = new RtfFont("仿宋_GB2312", 9, Font.NORMAL,Color.BLACK);/** 表格设置 author:yyli Sep 15, 2010 */Table table = new Table(12, 16);int[] withs = { 3, 9, 5, 4, 4, 3, 3, 14, 14, 14, 14, 14 };/** 设置每列所占比例 author:yyli Sep 15, 2010 */table.setWidths(withs);/** 表格所占页面宽度 author:yyli Sep 15, 2010 */table.setWidth(100);/** 居中显示 author:yyli Sep 15, 2010 */table.setAlignment(Element.ALIGN_CENTER);/** 自动填满 author:yyli Sep 15, 2010 */table.setAutoFillEmptyCells(true);/** 第一行（标题） author:yyli Sep 15, 2010 */String titleString = "东南大学 "+ (String) session.get("selectXn")+ "-"+ String.valueOf(Integer.parseInt((String) session.get("selectXn"))) + " 学年第 "+ (String) session.get("selectXq") + "学期 学生个人课表";Paragraph title = new Paragraph(titleString);// 设置标题格式对其方式title.setAlignment(Element.ALIGN_CENTER);title.setFont(titleFont);doc.add(title);/** 第二行（正文） author:yyli Sep 15, 2010 */String contextString = "院系:" + (String) session.get("yxmc") + "    专业:"+ (String) session.get("zymc") + "    学号:"+ (String) session.get("xh") + "    一卡通号:"+ (String) session.get("userId") + "    姓名:"+ (String) session.get("stuName");Paragraph context = new Paragraph(contextString);// 正文格式对齐方式context.setAlignment(Element.ALIGN_CENTER);context.setFont(contextFont);// 与上一段落（标题）的行距context.setSpacingBefore(10);// 设置第一行空的列数（缩进）// context.setFirstLineIndent(20);doc.add(context);/** 第三行（表格） author:yyli Sep 15, 2010 */Cell[] cellHeaders = new Cell[11];cellHeaders[0] = new Cell(new Phrase("序号", contextFont));cellHeaders[1] = new Cell(new Phrase("课程名称", contextFont));cellHeaders[2] = new Cell(new Phrase("教师", contextFont));cellHeaders[3] = new Cell(new Phrase("学分", contextFont));cellHeaders[4] = new Cell(new Phrase("上课周次", contextFont));cellHeaders[5] = new Cell(new Phrase(" ", contextFont));cellHeaders[5].setColspan(2);cellHeaders[6] = new Cell(new Phrase("星期一", contextFont));cellHeaders[7] = new Cell(new Phrase("星期二", contextFont));cellHeaders[8] = new Cell(new Phrase("星期三", contextFont));cellHeaders[9] = new Cell(new Phrase("星期四", contextFont));cellHeaders[10] = new Cell(new Phrase("星期五", contextFont));for (int i = 0; i < 11; i++) {/** 居中显示 author:yyli Sep 15, 2010 */cellHeaders[i].setHorizontalAlignment(Element.ALIGN_CENTER);/** 纵向居中显示 author:yyli Sep 15, 2010 */cellHeaders[i].setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cellHeaders[i]);}/** 向表格填充数据 author:yyli Sep 15, 2010 */for (int i = 0; i < 15; i++) {/** 第0列 author:yyli Sep 15, 2010 */Cell cell0 = new Cell(new Phrase(String.valueOf(i + 1), contextFont));cell0.setHorizontalAlignment(Element.ALIGN_CENTER);cell0.setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cell0);/** 第1-4列 author:yyli Sep 15, 2010 */Cell[] cell1_4 = new Cell[4];if (i < leftList.size()) {cell1_4[0] = new Cell(new Phrase(str_changenbsp(leftList.get(i).getKcmc()), contextFont));cell1_4[1] = new Cell(new Phrase(str_changenbsp(leftList.get(i).getJsxm()), contextFont));cell1_4[2] = new Cell(new Phrase(str_changenbsp(leftList.get(i).getXf()), contextFont));cell1_4[3] = new Cell(new Phrase(str_changenbsp(leftList.get(i).getJszc()), contextFont));}for (int n = 0; n < cell1_4.length; n++) {cell1_4[n].setHorizontalAlignment(Element.ALIGN_CENTER);cell1_4[n].setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cell1_4[n]);}/** 第5列 author:yyli Sep 15, 2010 */Cell cell5 = null;if (i == 0) {cell5 = new Cell(new Phrase("上午", contextFont));cell5.setRowspan(5);}if (i == 5) {cell5 = new Cell(new Phrase("下午", contextFont));cell5.setRowspan(5);}if (i == 10) {cell5 = new Cell(new Phrase("晚上", contextFont));cell5.setRowspan(2);}if (i == 12) {cell5 = new Cell(new Phrase("周六", contextFont));cell5.setColspan(2);}if (i == 13) {cell5 = new Cell(new Phrase("周日", contextFont));cell5.setColspan(2);}if (i == 14) {cell5 = new Cell(new Phrase("备注", contextFont));cell5.setColspan(2);}if (cell5 != null) {cell5.setHorizontalAlignment(Element.ALIGN_CENTER);cell5.setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cell5);}/** 第6列 author:yyli Sep 15, 2010 */if (i < 12) {Cell cell2 = new Cell(new Phrase(String.valueOf(i + 1),contextFont));cell2.setHorizontalAlignment(Element.ALIGN_CENTER);cell2.setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cell2);}/** 第7-11列 author:yyli Sep 15, 2010 */if (i == 0 || i == 5 || i == 10) {Cell[] cell7_11 = new Cell[5];for (int n = 0; n < 5; n++) {cell7_11[n] = new Cell(new Phrase(str_changebr(stuCurriculumArray[i + n]),contextFont));cell7_11[n].setHorizontalAlignment(Element.ALIGN_CENTER);cell7_11[n].setVerticalAlignment(Element.ALIGN_MIDDLE);if (i == 0 || i == 5) {cell7_11[n].setRowspan(5);} else {cell7_11[n].setRowspan(2);}table.addCell(cell7_11[n]);}}Cell cell7 = null;if (i == 12) {cell7 = new Cell(new Phrase(str_changebr(stuCurriculumArray[15]), contextFont));}if (i == 13) {cell7 = new Cell(new Phrase(str_changebr(stuCurriculumArray[16]), contextFont));}if (i == 14) {cell7 = new Cell(new Phrase(str_changebr(stuCurriculumArray[17]), contextFont));}if (cell7 != null) {cell7.setColspan(5);cell7.setHorizontalAlignment(Element.ALIGN_CENTER);cell7.setVerticalAlignment(Element.ALIGN_MIDDLE);table.addCell(cell7);}}doc.add(table);doc.close();// 得到输入流  ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());baos.close();return bais;}public String str_changenbsp(String str) {if (str != null) {return str.replaceAll(" ", "");} else {return "";}}public String str_changebr(String str) {if (str != null) {return str.replaceAll("<br>", "\n");} else {return "";}}
}