java操作xls与pdf文件 struts下载实例
jxl是一个java操作excel的工具, 在开源世界中，有两套比较有影响的API可供使用，一个是POI，一个是jExcelAPI。其中功能相对POI比较弱一点。但jExcelAPI对中文支持非常好，API是纯Java的， 并不依赖Windows系统，即使运行在Linux下，它同样能够正确的处理Excel文件。 另外需要说明的是，这套API对图形和图表的支持很有限，而且仅仅识别PNG格式。
此代码在工厂框架中应用有些地方不是用详细
jsp中的代码
struts中的代码
此代码在工厂框架中应用有些地方不是用详细
jsp中的代码
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ include file="/commons/taglibs.jsp"%>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="../styles/default.css" />
<link rel="stylesheet" type="text/css" href="../styles/main.css" />
<%@ include file="/commons/meta.jsp"%>
<script type="text/javascript">
function onloadXls(){
alert("start onload...");
document.URL="xls.do?action=onloadXls";
}
function onloadPdf(){
alert("start onload...");
document.URL="xls.do?action=onloadPdf";
}
</script>
</head>
<body>
<div class="pageTitle">
xls下载
</div>
<div class="list">
<div class="listTopOperation">
<div class="select">
<div id="_list_IUD" class="IUD">
<button onclick="onloadXls()">
下载xls
</button>
<button onclick="onloadPdf()">
下载pdf
</button>
</div>
</div>
<table id="mytable" border="0" cellspacing="1" cellpadding="0" width="100%">
<thead>
<tr>
<th width="30px;">
选择
</th>
<th>
编号
</th>
<th>
名称
</th>
<th>
价格
</th>
<th>
备注
</th>
</tr>
</thead>
<tbody id="_list_Tbody">
<c:forEach var="c" items="${requestScope.com}">
<tr selected="false" keyName="num" keyValue="${c.id}">
<td>
<input name="checkedlist" type="radio" value="${c.id}">
</td>
<td>
${c.id}
</td>
<td>
${c.productName }
</td>
<td>
${c.productPrice }
</td>
<td>
${c.productRemark }
</td>
</tr>
</c:forEach>
</tbody>
</table>
<div>
</div>
</body>
</html>
struts中的代码
package com.newer.business.xls.web.action;
import java.awt.Color;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
import jxl.write.Colour;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.lowagie.text.Cell;
import com.lowagie.text.Chapter;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Section;
import com.lowagie.text.Table;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfWriter;
import com.newer.business.commodity.manager.CommodityManager;
import com.newer.business.pojo.Commodity;
import com.newer.core.web.StrutsAction;
public class XlsAction extends StrutsAction {
private CommodityManager com;
public void setCom(CommodityManager com) {
this.com = com;
}
//进入主页显示所有商品信息
public ActionForward xlsIndex(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
request.setAttribute("com",com.getAll());
return mapping.findForward("index");
}
/*****************************************xls下载————开始***************************************************/
// 开始下载xls
public ActionForward onloadXls(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
System.out.println("start onload................xls");
//调用弹出框
response(request,response,getXlsFile(request));
return null;
}
// 获得xls文件向xls文件中添加数据
@SuppressWarnings("deprecation")
private File getXlsFile(HttpServletRequest request) {
//xls文件存放路径 项目中的pdfOrxls文件夹中
String pathName=request.getRealPath("/")+"pdfOrxls/文件xls.xls";
File file = new File(pathName);
try {
if (!file.exists()) {
file.createNewFile();
}
// 打开文件
WritableWorkbook book = Workbook.createWorkbook(file);
// 生成名为“第一页”的工作表，参数0表示这是第一页
WritableSheet sheet = book.createSheet(" 第一页", 0);
//设置大标题样式
WritableFont title =
new WritableFont(WritableFont.TIMES, 16 ,WritableFont.BOLD,false, UnderlineStyle.NO_UNDERLINE,
Colour.RED);
WritableCellFormat format1 = new WritableCellFormat(title);
//把水平对齐方式指定为居中
format1.setAlignment(jxl.format.Alignment.CENTRE);
//合并第一列第一行到第三列第一行的所有单元格
sheet.mergeCells(0,0,3,0);
sheet.addCell(new Label(0,0,"商品信息",format1));
//设置小标题样式
WritableFont font=
new WritableFont(WritableFont.TIMES, 10 ,WritableFont.BOLD,false, UnderlineStyle.NO_UNDERLINE,
Colour.BLACK);
format1 = new WritableCellFormat(font);
format1.setBackground(Colour.CORAL);
// 把垂直对齐方式指定为居中
format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
//给xls文件添加标题
sheet.addCell(new Label(0,1,"商品ID",format1));
sheet.addCell(new Label(1,1,"商品名称",format1));
sheet.addCell(new Label(2,1,"商品价格",format1));
sheet.addCell(new Label(3,1,"商品备注",format1));
//设置内容样式
WritableFont context=
new WritableFont(WritableFont.TIMES, 10 ,WritableFont.NO_BOLD,false, UnderlineStyle.NO_UNDERLINE,
Colour.GRAY_25);
format1 = new WritableCellFormat(context);
// 把垂直对齐方式指定为居中
format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
//获得商品信息集合
List<Commodity> list=com.getAll();
//给xls文件添加内容
for(int i=0;i<list.size();i++){
Commodity c=list.get(i);
jxl.write.Number id = new jxl.write.Number(0,i+2,c.getId(),format1);
sheet.addCell(id);
Label name = new Label(1, i+2,c.getProductName(),format1);
sheet.addCell(name);
jxl.write.Number price = new jxl.write.Number(2,i+2,c.getProductPrice(),format1);
sheet.addCell(price);
Label remark= new Label(3, i+2,c.getProductRemark(),format1);
sheet.addCell(remark);
}
// 写入数据并关闭文件
book.write();
book.close();
} catch (Exception e) {
System.out.println(e);
}
return file;
}
/*****************************************xls下载————结束***************************************************/
/*****************************************pdf下载————开始***************************************************/
// 开始下载pdf
public ActionForward onloadPdf(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
System.out.println("start onload................pdf");
//调用弹出框
response(request,response,getPdfFile(request));
return null;
}
// 获得pdf文件向pdf文件中添加数据
@SuppressWarnings("deprecation")
private File getPdfFile(HttpServletRequest request){
// 创建一个Document对象
Document document = new Document();
File file=null;
try
{
//pdf文件存放路径 项目中的pdfOrxls文件夹中
String pathName=request.getRealPath("/")+"pdfOrxls/文件pdf.pdf";
file=new File(pathName);
// 生成名为文件pdf.pdf 的文档
PdfWriter.getInstance(document, new FileOutputStream(pathName));
// 添加PDF文档的一些信息
document.addTitle("Hello World example");
document.addAuthor("Bruno Lowagie");
document.addSubject("This example explains how to add metadata.");
document.addKeywords("iText, Hello World, step 3, metadata");
document.addCreator("My program using iText");
// 打开文档，将要写入内容
document.open();
//显示中文必须设置中文字体
BaseFont bfChinese = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", false);
Font toptitle = new Font(bfChinese, 16, Font.BOLD, Color.red);
Font title = new Font(bfChinese, 10, Font.BOLD, Color.ORANGE);
Font font = new Font(bfChinese, 8, Font.COURIER, Color.GRAY);
//设置段落标题并设置字体
Paragraph chapterTitle = new Paragraph("商品信息",toptitle);
//创建了一个章节的对象，标题为"Chapter 1"
Chapter chapter1 = new Chapter(chapterTitle,1);
//设置为0,则在标题前面没有编号.反之...
chapter1.setNumberDepth(0);
//创建章节下的子章节.
Paragraph sectionTitle = new Paragraph("Version No 1.1", toptitle);
//添加对象,属于chapter1。
Section section1 = chapter1.addSection(sectionTitle);
//写文本内容
Paragraph text = new Paragraph("创建人：admin",title);
section1.add(text);
text = new Paragraph("创建时间:"+new Date(),title);
section1.add(text);
//创建表格对象
Table table = new Table(4);
//设置表格边框颜色
table.setBorderColor(new Color(220, 255, 100));
//边距
table.setPadding(1);
//间距
table.setSpacing(1);
table.setBorderWidth(1);
//整个表居中
table.setAlignment(1);
//单元格对象
Cell cell = null;
//添加表头信息
cell= new Cell (new Paragraph ("商品信息",toptitle));
cell.setHeader(true);
cell.setColspan(4);
//内容居中对齐
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(cell);
table.endHeaders();
//添加表标题
cell= new Cell (new Paragraph("商品ID",title));
cell.setBackgroundColor(Color.GRAY);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(cell);
cell= new Cell (new Paragraph("商品名称",title));
cell.setBackgroundColor(Color.GRAY);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(cell);
cell= new Cell (new Paragraph("商品价格",title));
cell.setBackgroundColor(Color.GRAY);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(cell);
cell= new Cell (new Paragraph("商品备注",title));
cell.setBackgroundColor(Color.GRAY);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(cell);
//添加表的内容
//获得商品信息集合
List<Commodity> list=com.getAll();
//给pdf文件添加内容
for(int i=0;i<list.size();i++){
Commodity c=list.get(i);
table.addCell(new Paragraph(c.getId()+"",font));
table.addCell(new Paragraph(c.getProductName(),font));
table.addCell(new Paragraph(c.getProductPrice()+"",font));
table.addCell(new Paragraph(c.getProductRemark(),font));
}
//将表格对象添加到对象中
section1.add(table);
document.add(section1);
}
catch (Exception de)
{
System.err.println(de.getMessage());
}
finally{
// 关闭打开的文档
document.close();
}
return file;
}
/*****************************************pdf下载————结束***************************************************/
/***************************************下载弹出框—————开始***********************************************/
//弹出对话框下载
private void response(HttpServletRequest request, HttpServletResponse response,File file){
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
OutputStream fos = null;
InputStream fis = null;
try{
//获得处理过的xls文件或pdf文件 file
File uploadFile =file;
fis = new FileInputStream(uploadFile);
bis = new BufferedInputStream(fis);
fos = response.getOutputStream();
bos = new BufferedOutputStream(fos);
// 这个就就是弹出下载对话框的关键代码
response.setHeader("Content-disposition", "attachment;filename="
+ URLEncoder.encode(uploadFile.getName(), "utf-8"));
int bytesRead = 0;
// 这个地方的同上传的一样。我就不多说了，都是用输入流进行先读，然后用输出流去写，唯一不同的是我用的是缓冲输入输出流
byte[] buffer = new byte[8192];
while ((bytesRead = bis.read(buffer, 0, 8192)) != -1) {
bos.write(buffer, 0, bytesRead);
}
}catch(Exception e){
e.printStackTrace();
}
finally{
try{
bos.flush();
fis.close();
bis.close();
fos.close();
bos.close();
}catch(Exception e){
//e.printStackTrace();
System.out.println("下载弹出框出错了...................");
}
}
}
/***************************************下载弹出框—————结束***********************************************/
}