Spring mvc进行Excel导出

/**
    *
    *参数省略
   **/

String fileName=new SimpleDateFormat("yyyy-MM-dd").format(new Date())+"异常账号筛选";
        //调用service获取数据(可以是数据库或者其他地方)
	List<AccountModel> accounts =accountService.gets();
        //获取Excel表头对应的字段
        List<Map<String,Object>> list=createExcelRecord(accounts);
        String columnNames[]={"序号","P用户名","Passport","用户名2","Passport2","test3","test4"};//列名
        String keys[]={"id","UserName","Passport","Name1","passport","test3date","test4date"};//map中的key
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            ExcelUtils.createWorkBook(list,keys,columnNames).write(os);
        } catch (IOException e) {
            e.printStackTrace();
        }
        byte[] content = os.toByteArray();
        InputStream is = new ByteArrayInputStream(content);
        response.reset();
        response.setContentType("application/vnd.ms-excel;charset=utf-8");
        response.setHeader("Content-Disposition", "attachment;filename="+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));
        ServletOutputStream out = response.getOutputStream();
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        try {
            bis = new BufferedInputStream(is);
            bos = new BufferedOutputStream(out);
            byte[] buff = new byte[2048];
            int bytesRead;
            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);
            }
        } catch (final IOException e) {
            throw e;
        } finally {
            if (bis != null)
                bis.close();
            if (bos != null)
                bos.close();
        }
        return null;
    }
//自定义模型和Excel表格的对应关系
    private List<Map<String, Object>> createExcelRecord(List<AccountModel> projects) {
        List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("sheetName", "sheet1");
        listmap.add(map);
        AccountModel project=null;
        for (int j = 0; j < projects.size(); j++) {
            project=projects.get(j);
            Map<String, Object> mapValue = new HashMap<String, Object>();
            mapValue.put("id", j+1);
            mapValue.put("UserName", project.getUserName());
            mapValue.put("Passport", project.gepPassport());
            mapValue.put("Name2", project.getName());
            mapValue.put("passport2", project.getpassport());
            mapValue.put("test3", project.gettest3());
            mapValue.put("test4", project.gettest4()==1?"已解决":"未解决");
            listmap.add(mapValue);
        }
        return listmap;
    }
}

//导出Excel
		$(document).on("click", ".btn-excel", function() {
			 var ch= $("#type");
			 var type=[];
			 ch.each(function(){
				 type.push($(this).val());
			 });
			 var operation=[];
			 var getoperations=$("#operation");
			 getoperations.each(function(){
				 operation.push($(this).val());
			 })
			 var statue=$("#statue").val();
			 var username=$("#username").val();
			 var usernameLimit=$("#namelimit").val();
			 var passport=$("#passport").val();
			 var passportlimit=$("#passportlimit").val();
			 var url="/excel/download?type="+type+"&operation="+operation+"&statue="+statue+"&username="+username+"&username_limit="+usernameLimit+"&passport="+passport+"&passport_limit="+passportlimit;
			 window.open(url);
		});

public class ExcelUtils {

    /**
     * 创建excel文档，
     * @param list 数据
     * @param keys list中map的key数组集合
     * @param columnNames excel的列名
     * @param comment  是否加批注
     * */
    public static Workbook createWorkBook(List<Map<String, Object>> list,String []keys,String columnNames[],boolean commentOrNot) {
    	
    	//批注内容(报表使用)
    	 List<String> parames = new ArrayList<String>();
	    	 parames.add("1");
	    	 parames.add("批注1");
	    	 parames.add("批注21");
	    	 parames.add("批注3");
	    	 parames.add("批注4");
	    	
	    	 
        // 创建excel工作簿
        Workbook wb = new HSSFWorkbook();
        // 创建第一个sheet（页），并命名
        Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
        // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
        for(int i=0;i<keys.length;i++){
            sheet.setColumnWidth((short) i, (short) (35.7 * 150));
        }
        //冻结第一行
        sheet.createFreezePane(0,1,0,1);
        // 创建第一行
        Row row = sheet.createRow((short) 0);

        // 创建两种单元格格式
        CellStyle cs = wb.createCellStyle();
        CellStyle cs2 = wb.createCellStyle();
        
        // 创建两种字体
        Font f = wb.createFont();
        Font f2 = wb.createFont();

        // 创建第一种字体样式（用于列名）
        f.setFontHeightInPoints((short) 10);
        f.setColor(IndexedColors.BLACK.getIndex());
        f.setBoldweight(Font.BOLDWEIGHT_BOLD);

        // 创建第二种字体样式（用于值）
        f2.setFontHeightInPoints((short) 10);
        f2.setColor(IndexedColors.BLACK.getIndex());
        	
        // 设置第一种单元格的样式（用于列名）
        cs.setFont(f);
        cs.setBorderLeft(CellStyle.BORDER_THIN);
        cs.setBorderRight(CellStyle.BORDER_THIN);
        cs.setBorderTop(CellStyle.BORDER_THIN);
        cs.setBorderBottom(CellStyle.BORDER_THIN);
        cs.setAlignment(CellStyle.ALIGN_CENTER);

        // 设置第二种单元格的样式（用于值）
        cs2.setFont(f2);
        cs2.setBorderLeft(CellStyle.BORDER_THIN);
        cs2.setBorderRight(CellStyle.BORDER_THIN);
        cs2.setBorderTop(CellStyle.BORDER_THIN);
        cs2.setBorderBottom(CellStyle.BORDER_THIN);
        cs2.setAlignment(CellStyle.ALIGN_CENTER);
        //设置列名
        for(int i=0;i<columnNames.length;i++){
            Cell cell = row.createCell(i);
            cell.setCellValue(columnNames[i]);
            cell.setCellStyle(cs);
            if(commentOrNot){//根据业务判断是否需要批注<span id="transmark"></span>
            	Drawing patr = sheet.createDrawingPatriarch();
    			ClientAnchor anchor = patr.createAnchor(0, 0, 0, 0, 5, 1, 8, 3);//创建批注位置
    			Comment comment = patr.createCellComment(anchor);//创建批注
    			comment.setString(new HSSFRichTextString(parames.get(i)));//设置批注内容
    			comment.setVisible(true);//设置批注默认显示
                cell.setCellComment(comment);
            }
        }
        //设置每行每列的值
        for (short i = 1; i < list.size(); i++) {
            // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
            // 创建一行，在页sheet上
            Row row1 = sheet.createRow((short) i);
            // 在row行上创建一个方格
            for(short j=0;j<keys.length;j++){
                Cell cell = row1.createCell(j);
                cell.setCellValue(list.get(i).get(keys[j]) == null?" ": list.get(i).get(keys[j]).toString());
                cell.setCellStyle(cs2);
            }
        }
        return wb;
    }