JAVA-POI导入数据到excel并弹出保存框

准备工作，jar包的maven依赖如下：

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.11</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>

2.spring mvc层代码

@RequestMapping("/excelExport")
public void excelExport(NumberEvt evt,HttpServletResponse res) {
numberService.exportExcel(evt, res);
}

3.service接口层代码

/**将码号查询页面的数据导出为一张excel表格**/
void exportExcel(NumberEvt evt,HttpServletResponse res);

4.service接口实现层代码

/** 将码号查询页面的数据导出为一张excel表格方法的实现 **/
public void exportExcel(NumberEvt evt, HttpServletResponse res) {
// TODO Auto-generated method stub
String[] headers = { "码号", "状态", "码号段名称", "所属单位", "所属设备", "码号特征", "定价级别", "码号价格", "备注" };
List<NumberVo> list = jdbcTemplate.query(sql_query, new Object[] { evt.getCode() }, new RowMapper<NumberVo>() {
public NumberVo mapRow(ResultSet rs, int rowNum) throws SQLException {
// TODO Auto-generated method stub
NumberVo numberVo = new NumberVo();
numberVo.setPhone(rs.getString(1));
numberVo.setStatus(rs.getString(2));
numberVo.setCodePartName(rs.getString(3));
numberVo.setUnit(rs.getString(4));
numberVo.setFacility(rs.getString(5));
numberVo.setCodeFeature(rs.getString(6));
numberVo.setPricingLevel(rs.getString(7));
numberVo.setCodePrice(rs.getShort(8));
numberVo.setRemark(rs.getString(9));
return numberVo;
}
});
try {
ExcelUtils.export(list, headers, res);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

5.ExcelUtils工具类代码

package com.ffcs.oss.production.number.utils;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.servlet.ServletOutputStream;
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.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import com.ffcs.oss.production.number.model.NumberVo;

/**
* 将页面上的数据导出到一张excel表格的工具类
*
* @author may
*
*/
public class ExcelUtils {
public static void export(List<NumberVo> list, String[] headers, HttpServletResponse res) throws IOException {
// 创建excel
@SuppressWarnings("resource")
HSSFWorkbook wb = new HSSFWorkbook();

// 创建sheet
HSSFSheet sheet = wb.createSheet("码号查询数据");

// 创建表头行
HSSFRow rowTitle = sheet.createRow(0);

// 创建表头行样式
HSSFCellStyle styleTitle = wb.createCellStyle();
styleTitle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 居中
HSSFFont fontTitle = wb.createFont();
// 宋体加粗
fontTitle.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
fontTitle.setFontName("宋体");
fontTitle.setFontHeight((short) 200);
styleTitle.setFont(fontTitle);

for (int i = 0; i < headers.length; i++) {
// 在表头行上创建1列
HSSFCell cellTitle = rowTitle.createCell(i);
// 列标题及样式
cellTitle.setCellValue(headers[i]);
cellTitle.setCellStyle(styleTitle);
}
// 设置文本行的每一列的样式
HSSFCellStyle styleCenter = wb.createCellStyle();
styleCenter.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 居中

for (int i = 0; i < list.size(); i++) {
NumberVo item = list.get(i);
HSSFRow row = sheet.createRow(i + 1);

HSSFCell cell = row.createCell(0);
cell.setCellValue(item.getPhone());
cell.setCellStyle(styleCenter);

cell = row.createCell(1);
cell.setCellValue(item.getStatus());
cell.setCellStyle(styleCenter);

cell = row.createCell(2);
cell.setCellValue(item.getCodePartName());
cell.setCellStyle(styleCenter);

cell = row.createCell(3);
cell.setCellValue(item.getUnit());
cell.setCellStyle(styleCenter);

cell = row.createCell(4);
cell.setCellValue(item.getFacility());
cell.setCellStyle(styleCenter);

cell = row.createCell(5);
cell.setCellValue(item.getCodeFeature());
cell.setCellStyle(styleCenter);

cell = row.createCell(6);
cell.setCellValue(item.getPricingLevel());
cell.setCellStyle(styleCenter);

cell = row.createCell(7);
cell.setCellValue(item.getCodePrice());
cell.setCellStyle(styleCenter);

cell = row.createCell(8);
cell.setCellValue(item.getRemark());
cell.setCellStyle(styleCenter);
}
// 不弹出保存框方式
/*
* FileOutputStream fout = new FileOutputStream("e:/numberQuery1.xls");
* wb.write(fout); fout.close(); wb.close();
* System.out.println("导出完成！");
*/

// 弹出保存框方式
String fileName = "码号查询表";
ByteArrayOutputStream os = new ByteArrayOutputStream();
wb.write(os);
byte[] content = os.toByteArray();
InputStream is = new ByteArrayInputStream(content);
// 设置response参数，可以打开下载页面
res.reset();
res.setContentType("application/vnd.ms-excel;charset=utf-8");
res.setHeader("Content-Disposition",
"attachment;filename=" + new String((fileName + ".xls").getBytes(), "iso-8859-1"));
ServletOutputStream out = res.getOutputStream();
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
bis = new BufferedInputStream(is);
bos = new BufferedOutputStream(out);
byte[] buff = new byte[2048];
int bytesRead;
// Simple read/write loop.
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
} finally {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}
}
}

6.添加一些测试数据后，结果截图如下所示：