POI实现Excel报表，实现下载、图片输出、字体设置

POI实现Excel报表

1、poi技术是javaweb开发中常用的技术，这里我用servlet+poi+jsp写个简单列子分享给大家，简单易懂，解决一切POI烦恼，拿来就可以用。

2、主要实现功能：动态创xls、写入数据、字体设置、跨行跨列、插入图片显示确定的位置、点击导出xls是开始下载、支持各种浏览器（亲自测试）。

3、将一下代码复制下去就可以用了，如果你要改变表格样式只需要稍加修改就搞定了。

4、有什么需要可以加QQ群：180258862

5、servlet代码：

import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.IOException;

import java.io.OutputStream;

import java.io.PrintWriter;

import javax.imageio.ImageIO;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFClientAnchor;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFPatriarch;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.ss.util.Region;

/**

* Excel报表导出所需要jar

* @author Administrator

*commons-codec-1.7.jar；poi-3.9-20121203.jar；

*poi-excelant-3.9-20121203.jar；poi-ooxml-3.9-20121203.jar；

*poi-ooxml-schemas-3.9-20121203.jar；poi-scratchpad-3.9-20121203.jar

*/

public class XlsExport extends HttpServlet {

public void destroy() {

super.destroy();

}

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doPost(request, response);

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html;charset=utf-8");

PrintWriter out = response.getWriter();

response.reset();

response.setContentType(

"application/x-msdownload");

response.setHeader(

"Content-Disposition",

"attachment; filename="

+ java.net.URLEncoder.encode("报表.xls","UTF-8"));

service(response);

out.flush();

out.close();

}

public void init() throws ServletException {

}

private void service(HttpServletResponse response){

HSSFWorkbook workbook = new HSSFWorkbook();

HSSFSheet sheet = workbook.createSheet("创建sheet名称");

HSSFFont font = workbook.createFont();

HSSFCellStyle cell = workbook.createCellStyle();

HSSFRow rowX = null;

HSSFCell celX = null;

//画表格 共10行10列

for (int j = 0; j <15; j++) {

rowX = sheet.createRow(j);

for (int i = 0; i < 10; i++) {

celX = rowX.createCell((short)i);

sheet.setColumnWidth(i,50*110);

}

}

for (int i = 0; i <10; i++) {

rowX = sheet.getRow(i);

for (int j = 0; j <10; j++) {

celX = rowX.createCell((short) j);

setStyleValue(celX, cell,font);

celX.setCellValue("第"+i+"行，第"+j+"列");

}

}

//单元格合并

xlsCellHB(sheet, 10,0,14, 4);

rowX = sheet.getRow(10);

celX = rowX.createCell((short)0);

setStyleValue(celX, cell,font);

celX.setCellValue("单元格合并");

//添加图片

xlsCellHB(sheet, 10,5,14, 9);

celX = rowX.createCell((short)5);

celX.setCellValue("图片");

try {

File file=new File(this.getClass().getResource("/").getPath());

String path=file.getAbsolutePath();

xlsCellImage(sheet, workbook, path+"/com/java/poi/mm.jpg");

} catch (IOException e1) {

e1.printStackTrace();

}

OutputStream outputStream = null;

try {

outputStream = response.getOutputStream();

workbook.write(outputStream);

outputStream.close();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (outputStream != null) {

try {

outputStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

/**

* 表格样式和字体设置

* @param celX

* @param cell

* @param font

*/

private void setStyleValue(HSSFCell celX,HSSFCellStyle cell,HSSFFont font){

font.setFontHeightInPoints((short)14); //字体大小

font.setFontName("仿宋_GB2312"); //字体类型

font.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);

cell.setBorderLeft((short) 1);

cell.setBorderBottom((short) 1);

cell.setBorderRight((short) 1);

cell.setWrapText(true);//是否自动换行

cell.setFont(font);

cell.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中

cell.setBorderTop((short) 1);

celX.setCellStyle(cell);

}

/**

* 单元格合并

* 单元格编号从0开始

*/

private void xlsCellHB(HSSFSheet sheet,int startrow,int startcolum,int endrow,int endcolum){

sheet.addMergedRegion(new Region(startrow, (short)startcolum,endrow, (short) (endcolum)));

}

/**

* 插入图片

* 需要commons-codec-1.7.jar支持

*/

private void xlsCellImage(HSSFSheet sheet,HSSFWorkbook workbook,String imagePath) throws IOException{

System.out.println(imagePath);

ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();

BufferedImage bufferImg = ImageIO.read(new File(imagePath));

ImageIO.write(bufferImg, "jpg", byteArrayOut);

HSSFPatriarch patriarch = sheet.createDrawingPatriarch();

HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0,

(short) 5,10,(short)10,15);//图片保存在的单元格： 第5列至第10列、第10行至第15行

anchor.setAnchorType(3); //添加图片数量

// 插入图片

patriarch

.createPicture(anchor, workbook.addPicture(

byteArrayOut.toByteArray(),

HSSFWorkbook.PICTURE_TYPE_JPEG));

}

}

5、jsp代码： <a href="servlet路径">导出Excel</a>