用POI实现excel文件导出 代码示例分享

import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.List;

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.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Font;

/** *
* @return
* @desc
*/
public class exprotExcel {
public void exprotExcel(HttpServletResponse response,Integer page, Integer rows) throws Exception{
// 第一步，创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("操作记录");
// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0);
// 第四步，创建单元格，并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式

String fileName = "操作记录.xls";
this.setResponseHeader(response, fileName);
//       ***********************
//       HSSFRow curRow = sheet.createRow((int) 0); //取XSL文件Sheet1页上第2行
//       HSSFCell curCell = curRow.getCell(0); //第1列
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  //填充单元格
cellStyle.setFillForegroundColor(HSSFColor.WHITE.index);    //填黄色
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中
Font font = wb.createFont();
font.setFontHeightInPoints((short)10); //字体大小
font.setFontName("楷体");
font.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体
cellStyle.setFont(font);
//     font.setColor(HSSFColor.GREEN.index);    //绿字
//       curCell.setCellStyle(cellStyle);
//       ***********************
//汇总查询
HSSFCell cell = row.createCell(0);
/*cell.setCellValue("操作记录");
cell.setCellStyle(cellStyle);*/

//设置列名及风格
row = sheet.createRow(0);
cell = row.createCell(0);
cell.setCellValue("序号");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue("时间");
cell.setCellStyle(style);
cell = row.createCell(2);
cell.setCellValue("地点");
cell.setCellStyle(style);
cell = row.createCell(3);
cell.setCellValue("操作人");
cell.setCellStyle(style);
cell = row.createCell(4);
cell.setCellValue("操作动作");
cell.setCellStyle(style);
cell = row.createCell(5);
cell.setCellValue("描述");
cell.setCellStyle(style);

//调整excel列的宽度  与上面一一对应
sheet.setColumnWidth(0, 4000);
sheet.setColumnWidth(1, 6000);
sheet.setColumnWidth(2, 6000);
sheet.setColumnWidth(3, 4000);
sheet.setColumnWidth(4, 4000);
sheet.setColumnWidth(5, 50000);

//以下为查询出所有要导出的信息，存储在一个list中

List<OptLog> list =os.queryExcel(optLog);
if (list.size()>0) {
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow(i+1);
OptLog ls = (OptLog)list.get(i);
String st="";
switch (ls.getOptType()) {
case 1:
st="类型1";
break;
case 2:
st="类型2";
break;
default:
break;
}
cell = row.createCell(0);
cell.setCellValue(i+1);
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue(ls.getOptTime());
cell.setCellStyle(style);
cell = row.createCell(2);
cell.setCellValue(ls.getCenterdotName());
cell.setCellStyle(style);
cell = row.createCell(3);
cell.setCellValue(ls.getUserName());
cell.setCellStyle(style);
cell = row.createCell(4);
cell.setCellValue(st);
cell.setCellStyle(style);
cell = row.createCell(5);
cell.setCellValue(ls.getOptDesc());
cell.setCellStyle(style);
}

try {
//输出文件
OutputStream os = response.getOutputStream();
wb.write(os);
os.flush();
os.close();
} catch (Exception e) {
throw new Exception(e.toString());
}
}

}
public void setResponseHeader(HttpServletResponse response, String fileName) throws Exception {
try {
try {
fileName = new String(fileName.getBytes("GBK"), "ISO-8859-1");
} catch (UnsupportedEncodingException e) {
throw new Exception(e.toString());
}
response
.setContentType("application/octet-stream;charset=ISO8859-1");
response.setHeader("Content-Disposition", "attachment;filename="
+ fileName);
response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
} catch (Exception ex) {
throw new Exception(ex.toString());
}
}
}