Struts2利用iText导出word文档（包含表格）以提供下载
在公司实习期间，带我的老师让我实现一功能——在显示课表的页面上上点击“导出文件“时能以word文档形式下载课表。将课表导出到excel里的功能他们已经实现了，用的是Struts2+poi实现的。poi对excel表格操作能力很强，但是对word文档的支持一直没有更新，操作能力有限。
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。
使用了iText的iText-2.1.7.jar和iText-rtf-2.1.7.jar（可以到官网上下载各个版本）,借助这两个jar可生成rtf格式的文档,而指定文件后缀名时指定为.doc即为word文档。
点击页面上”导出课表“下载得到的word文档效果图：
struts.xml里的配置如下：
<!-- 保存为word文件 -->
<action name="studentCurriculumWord" class="studentCurriculumWordAction">
<result name="success" type="stream">
<param name="contentType">application/vnd.ms-word</param>
<param name="contentDisposition">attachment;filename="studentCurriculum.doc"</param>
<param name="inputName">wordFile</param>
</result>
</action>对应的Action代码如下：
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 cn.com.wiscom.jwxk.entity.StudentCurriculum;
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;
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return 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 "";
}
}
}