springMvc下导出Excel功能

1、ExcleUtils.java代码：

public class ExcelUtils {  
    //excel默认宽度；  
    private static int width = 256*14;  
    //默认字体  
    private static String excelfont = "微软雅黑";  
      
    /** 
     *  
     * @param excelName  导出的EXCEL名字 
     * @param sheetName  导出的SHEET名字  当前sheet数目只为1 
     * @param headers      导出的表格的表头 
     * @param ds_titles      导出的数据 map.get(key) 对应的 key 
     * @param ds_format    导出数据的样式 
     *                          1:String left;  
     *                          2:String center    
     *                          3:String right 
     *                          4 int  right 
     *                          5:float ###,###.## right  
     *                          6:number: #.00% 百分比 right 
     * @param widths      表格的列宽度  默认为 256*14 
     * @param data        数据集  List<Map> 
     * @param response 
     * @throws IOException 
     */  
    public static void export(String excelName, String sheetName,String[] headers,String[] ds_titles,int[] ds_format,int[] widths, List<Map<String,Object>> data ,HttpServletRequest request, HttpServletResponse response) throws IOException {  
        HttpSession session = request.getSession();    
        session.setAttribute("state", null);    
        if(widths==null){  
              widths = new int[ds_titles.length];  
              for(int i=0;i<ds_titles.length;i++){  
                  widths[i]=width;  
              }  
          }  
          if(ds_format==null){  
              ds_format = new int[ds_titles.length];  
              for(int i=0;i<ds_titles.length;i++){  
                  ds_format[i]=1;  
              }  
          }  
           //设置文件名  
            String fileName = "";  
            if(StringUtils.isNotEmpty(excelName)){  
                fileName = excelName;  
            }  
            //创建一个工作薄  
            HSSFWorkbook wb = new HSSFWorkbook();  
            //创建一个sheet  
            HSSFSheet  sheet = wb.createSheet(StringUtils.isNotEmpty(sheetName)?sheetName:"excel");  
            //创建表头，如果没有跳过  
            int headerrow = 0;  
            if(headers!=null){  
                HSSFRow  row = sheet.createRow(headerrow);  
                //表头样式  
                HSSFCellStyle style = wb.createCellStyle();    
                HSSFFont font = wb.createFont();  
                font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  
                font.setFontName(excelfont);  
                font.setFontHeightInPoints((short) 11);  
                style.setFont(font);  
                style.setAlignment(HSSFCellStyle.ALIGN_CENTER);    
                style.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
                style.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
                style.setBorderRight(HSSFCellStyle.BORDER_THIN);  
                style.setBorderTop(HSSFCellStyle.BORDER_THIN);  
                 for (int i = 0; i < headers.length; i++) {    
                    sheet.setColumnWidth((short)i,(short)widths[i]);   
                    HSSFCell cell = row.createCell(i);    
                    cell.setCellValue(headers[i]);    
                    cell.setCellStyle(style);    
                }    
                headerrow++;  
            }  
            //表格主体  解析list  
            if(data != null){  
                List styleList = new ArrayList();  
                  
                for (int i = 0; i <ds_titles.length; i++) {  //列数  
                    HSSFCellStyle style = wb.createCellStyle();    
                    HSSFFont font = wb.createFont();  
                    font.setFontName(excelfont);  
                    font.setFontHeightInPoints((short) 10);  
                    style.setFont(font);  
                    style.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
                    style.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
                    style.setBorderRight(HSSFCellStyle.BORDER_THIN);  
                    style.setBorderTop(HSSFCellStyle.BORDER_THIN);  
                    if(ds_format[i]==1){  
                        style.setAlignment(HSSFCellStyle.ALIGN_LEFT);    
                    }else if(ds_format[i]==2){  
                        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);    
                    }else if(ds_format[i]==3){  
                        style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);   
                         //int类型  
                    }else if(ds_format[i]==4){  
                        style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);   
                         //int类型  
                        style.setDataFormat(HSSFDataFormat.getBuiltinFormat("0"));     
                    }else if(ds_format[i]==5){  
                        //float类型  
                        style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);   
                        style.setDataFormat(HSSFDataFormat.getBuiltinFormat("#,##0.00"));     
                    }else if(ds_format[i]==6){  
                        //百分比类型  
                        style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);   
                        style.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00%"));    
                    }  
                    styleList.add(style);  
                }  
                for (int i = 0; i < data.size() ; i++) {  //行数  
                    HSSFRow  row = sheet.createRow(headerrow);  
                    Map map = data.get(i);  
                    for (int j = 0; j <ds_titles.length; j++) {  //列数  
                         HSSFCell cell = row.createCell(j);    
                         Object o = map.get(ds_titles[j]);  
                         if(o==null||"".equals(o)){  
                             cell.setCellValue("");  
                         }else if(ds_format[j]==4){  
                             //int  
                             cell.setCellValue((Long.valueOf((map.get(ds_titles[j]))+"")).longValue());   
                         }else if(ds_format[j]==5|| ds_format[j]==6){  
                             //float  
                             cell.setCellValue((Double.valueOf((map.get(ds_titles[j]))+"")).doubleValue());   
                         }else {  
                             cell.setCellValue(map.get(ds_titles[j])+"");   
                         }  
                           
                         cell.setCellStyle((HSSFCellStyle)styleList.get(j));    
                    }  
                    headerrow++;  
                }  
            }  
             
            fileName=fileName+".xls";  
            String filename = "";  
            try{  
               filename =encodeChineseDownloadFileName(request,fileName);  
            }catch(Exception e){  
                e.printStackTrace();  
            }  
//          final String userAgent = request.getHeader("USER-AGENT");  
//            if(userAgent.indexOf( "MSIE")!=-1){//IE浏览器  
//              filename = URLEncoder.encode(fileName,"UTF8");  
//            }else if(userAgent.indexOf( "Mozilla")!=-1){//google,火狐浏览器  
//              filename = new String(fileName.getBytes(), "ISO8859-1");  
//            }else{  
//              filename = URLEncoder.encode(fileName,"UTF8");//其他浏览器  
//            }  
              
            response.setHeader("Content-disposition", filename);  
            response.setContentType("application/vnd.ms-excel");    
            response.setHeader("Content-disposition", "attachment;filename="+filename);    
            response.setHeader("Pragma", "No-cache");  
            OutputStream ouputStream = response.getOutputStream();    
            wb.write(ouputStream);    
            ouputStream.flush();    
            ouputStream.close();  
            session.setAttribute("state", "open");  
              
    }  
      
    /**  
     * 对文件流输出下载的中文文件名进行编码 屏蔽各种浏览器版本的差异性  
     * @throws UnsupportedEncodingException   
     */    
    public static String encodeChineseDownloadFileName(    
            HttpServletRequest request, String pFileName) throws Exception {    
            
         String filename = null;      
            String agent = request.getHeader("USER-AGENT");      
            if (null != agent){      
                if (-1 != agent.indexOf("Firefox")) {//Firefox      
                    filename = "=?UTF-8?B?" + (new String(org.apache.commons.codec.binary.Base64.encodeBase64(pFileName.getBytes("UTF-8"))))+ "?=";      
                }else if (-1 != agent.indexOf("Chrome")) {//Chrome      
                    filename = new String(pFileName.getBytes(), "ISO8859-1");      
                } else {//IE7+      
                    filename = java.net.URLEncoder.encode(pFileName, "UTF-8");      
                    filename = filename.replace("+", "%20");  
                }      
            } else {      
                filename = pFileName;      
            }      
            return filename;     
    }    
}  

　　2、前端调用代码：

$("#exportExcel").click(function(){  
        var url = "exprotProductList";  
        $('#listForm').attr('action', url);  
        $('#listForm').submit();  
        $('#listForm').attr('action', "list");  
         
    }); 

　　3、controller中代码（springMVC）：

　　　　/**
	 * 测试下载
	 */
      @GetMapping("/exprotProductList")  
    　public void exportExcel(Product.Type type,Long countryId, Long productCategoryId, Long brandId, Long promotionId, Long productTagId, Boolean isMarketable, Boolean isList, Boolean isTop, Boolean isOutOfStock, Boolean isStockAlert, ModelMap model,HttpSession session,HttpServletRequest request,HttpServletResponse response){  
		String[] excelHeader = { "ID","国家", "商品编号", "名称","分类","创建日期"};  
        String[] ds_titles = { "id","country", "sn", "name","productCategory","createdDate"};  
        int[] ds_format = { 1,1, 1, 1,1,1};  
        try{  
        	Country country = null;
    	    if (countryId != null) {
    		    country =   countryService.find(countryId);
    		}
    	    ProductCategory productCategory = productCategoryService.find(productCategoryId);
    		Brand brand = brandService.find(brandId);
    		Promotion promotion = promotionService.find(promotionId);
    		ProductTag productTag = productTagService.find(productTagId);
        	List<Product> products = productService.findList(type, productCategory, country, brand, promotion, productTag,  isMarketable, isList, isTop, isOutOfStock, isStockAlert);
            List<Map<String,Object>> data = new ArrayList<Map<String,Object>>();  
            if(CollectionUtils.isNotEmpty(products)){  
                for(Product product : products){  
                    Map<String,Object> map = new HashMap<String,Object>();  
                    map.put("id", product.getId());  
                    map.put("country", product.getProductCategory().getCountry().getName());  
                    map.put("sn", product.getSn());  
                    map.put("name", product.getName());  
                    map.put("productCategory", product.getProductCategory().getName());  
                    map.put("createdDate", product.getCreatedDate());  
                    data.add(map);  
                }  
            } 
            ExcelUtils.export("商品表", "商品", excelHeader, ds_titles, ds_format, null, data, request, response);  
        }catch(Exception e){  
        	e.printStackTrace();
        }  
          
    }

　　4、servicer、servicerimpl、dao、daoimpl中的代码省略