SpringMvc 使用poi导入导出Excel

 Util类
 package com.common.util;  

 public class ExportUtil
 {
     private XSSFWorkbook wb = null;  

     private XSSFSheet sheet = null;  

     /**
      * @param wb
      * @param sheet
      */
     public ExportUtil(XSSFWorkbook wb, XSSFSheet sheet)
     {
         this.wb = wb;
         this.sheet = sheet;
     }  

     /**
      * 合并单元格后给合并后的单元格加边框
      *
      * @param region
      * @param cs
      */
     public void setRegionStyle(CellRangeAddress region, XSSFCellStyle cs)
     {  

         int toprowNum = region.getFirstRow();
         for (int i = toprowNum; i <= region.getLastRow(); i++)
         {
             XSSFRow row = sheet.getRow(i);
             for (int j = region.getFirstColumn(); j <= region.getLastColumn(); j++)
             {
                 XSSFCell cell = row.getCell(j);// XSSFCellUtil.getCell(row,
                                                 // (short) j);
                 cell.setCellStyle(cs);
             }
         }
     }  

     /**
      * 设置表头的单元格样式
      *
      * @return
      */
     public XSSFCellStyle getHeadStyle()
     {
         // 创建单元格样式
         XSSFCellStyle cellStyle = wb.createCellStyle();
         // 设置单元格的背景颜色为淡蓝色
         cellStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
         cellStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
         // 设置单元格居中对齐
         cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
         // 设置单元格垂直居中对齐
         cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
         // 创建单元格内容显示不下时自动换行
         cellStyle.setWrapText(true);
         // 设置单元格字体样式
         XSSFFont font = wb.createFont();
         // 设置字体加粗
         font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
         font.setFontName("宋体");
         font.setFontHeight((short) 200);
         cellStyle.setFont(font);
         // 设置单元格边框为细线条
         cellStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);
         return cellStyle;
     }  

     /**
      * 设置表体的单元格样式
      *
      * @return
      */
     public XSSFCellStyle getBodyStyle()
     {
         // 创建单元格样式
         XSSFCellStyle cellStyle = wb.createCellStyle();
         // 设置单元格居中对齐
         cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
         // 设置单元格垂直居中对齐
         cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
         // 创建单元格内容显示不下时自动换行
         cellStyle.setWrapText(true);
         // 设置单元格字体样式
         XSSFFont font = wb.createFont();
         // 设置字体加粗
         font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
         font.setFontName("宋体");
         font.setFontHeight((short) 200);
         cellStyle.setFont(font);
         // 设置单元格边框为细线条
         cellStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);
         cellStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);
         return cellStyle;
     }
 }
 service类
 public interface ITestExportExcelService
 {
     public void exportExcel(String hql,String [] titles,ServletOutputStream outputStream);
 }
 @Service
 public class TestExportExcelServiceImpl implements ITestExportExcelService
 {
     @Resource
     private ITestExportExcelDao dao;  

     public void exportExcel(String hql, String[] titles, ServletOutputStream outputStream)
     {
         List<Goods> list = dao.exportExcel(hql);
         // 创建一个workbook 对应一个excel应用文件
         XSSFWorkbook workBook = new XSSFWorkbook();
         // 在workbook中添加一个sheet,对应Excel文件中的sheet
         XSSFSheet sheet = workBook.createSheet("导出excel例子");
         ExportUtil exportUtil = new ExportUtil(workBook, sheet);
         XSSFCellStyle headStyle = exportUtil.getHeadStyle();
         XSSFCellStyle bodyStyle = exportUtil.getBodyStyle();
         // 构建表头
         XSSFRow headRow = sheet.createRow(0);
         XSSFCell cell = null;
         for (int i = 0; i < titles.length; i++)
         {
             cell = headRow.createCell(i);
             cell.setCellStyle(headStyle);
             cell.setCellValue(titles[i]);
         }
         // 构建表体数据
         if (list != null && list.size() > 0)
         {
             for (int j = 0; j < list.size(); j++)
             {
                 XSSFRow bodyRow = sheet.createRow(j + 1);
                 Goods goods = list.get(j);  

                 cell = bodyRow.createCell(0);
                 cell.setCellStyle(bodyStyle);
                 cell.setCellValue(goods.getGoodsName());  

                 cell = bodyRow.createCell(1);
                 cell.setCellStyle(bodyStyle);
                 cell.setCellValue(goods.getGoodsCost());  

                 cell = bodyRow.createCell(2);
                 cell.setCellStyle(bodyStyle);
                 cell.setCellValue(goods.getGoodsUnit());
             }
         }
         try
         {
             workBook.write(outputStream);
             outputStream.flush();
             outputStream.close();
         }
         catch (IOException e)
         {
             e.printStackTrace();
         }
         finally
         {
             try
             {
                 outputStream.close();
             }
             catch (IOException e)
             {
                 e.printStackTrace();
             }
         }  

     }  

 }
 dao类
 public interface ITestExportExcelDao
 {
     public List<Goods> exportExcel(String hql);
 }
 @Repository
 public class TestExportExcelDaoImpl implements ITestExportExcelDao
 {
     @Resource
     private SessionFactory factory;  

     /**
      * 以goods表为例导出测试
      */
     @SuppressWarnings("unchecked")
     public List<Goods> exportExcel(String hql)
     {
         Session session = factory.getCurrentSession();
         List<Goods> list = session.createQuery(hql).list();
         return list;
     }  

 }
 控制层Controller
 @Controller
 @RequestMapping("/testexportexcel/*")
 public class TestExportExcelController
 {
     @Resource
     private ITestExportExcelService service;  

     @RequestMapping
     public String exportExcel(HttpServletResponse response)
     {
         response.setContentType("application/binary;charset=ISO8859_1");
         try
         {
             ServletOutputStream outputStream = response.getOutputStream();
             String fileName = new String(("导出excel例子").getBytes(), "ISO8859_1");
             response.setHeader("Content-disposition", "attachment; filename=" + fileName + ".xlsx");// 组装附件名称和格式
             String hql = "from Goods";
             String[] titles = { "商品名", "商品单价", "商品单位" };
             service.exportExcel(hql, titles, outputStream);
         }
         catch (IOException e)
         {
             e.printStackTrace();
         }
         return null;
     }  

     @RequestMapping
     public String upload(HttpServletRequest request, HttpServletResponse response)
     {
         MultipartHttpServletRequest mulRequest = (MultipartHttpServletRequest) request;
         MultipartFile file = mulRequest.getFile("excel");
         String filename = file.getOriginalFilename();
         if (filename == null || "".equals(filename))
         {
             return null;
         }
         try
         {
             InputStream input = file.getInputStream();
             XSSFWorkbook workBook = new XSSFWorkbook(input);
             XSSFSheet sheet = workBook.getSheetAt(0);
             if (sheet != null)
             {
                 for (int i = 1; i < sheet.getPhysicalNumberOfRows(); i++)
                 {
                     XSSFRow row = sheet.getRow(i);
                     for (int j = 0; j < row.getPhysicalNumberOfCells(); j++)
                     {
                         XSSFCell cell = row.getCell(j);
                         String cellStr = cell.toString();
                         System.out.print("【"+cellStr+"】 ");
                     }
                     System.out.println();
                 }  

             }
         }
         catch (Exception e)
         {
             e.printStackTrace();
         }
         return "/test/uploadExcel.jsp";
     }  

 }  

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.14</version>
</dependency>