java中如何导出excel表格

如果你想导入excel:请参考:http://blog.csdn.net/xuanzhangran/article/details/71603478
或者:http://blog.csdn.net/xuanzhangran/article/details/70158995
本框架使用ssm。
1:点击导出订单,按照你的查询田间导出数据,如果没有查询条件就全部导出。
2:在调用工具类的时候需要导包,
3:所以需要在eclipse里导入这里写图片描述
4:jia包下载路径,无需c币:http://download.csdn.net/detail/xuanzhangran/9813051
5:仔细看完代码即可实现。

 

前台代码:

 

   

 

    

       

           //点击导出按钮调用function orderExport()需要查询的数据的条件带过去

       

    

 

后台代码:

 

      @RequestMapping("/orderExport.html")

    public void orderExport( HttpServletRequest request,

            @RequestParam(value="userName",required = false)String userName,

            @RequestParam(value="mobile",required = false)String mobile,

            @RequestParam(value="orderNumber",required = false)String

            @RequestParam(value="status",required = false)Byte status,

            @RequestParam(value = "startTime", required = false) String startTime1,

            @RequestParam(value = "endTime", required = false) String endTime1,

            HttpServletResponse response){

                //此处为查询的条件     

            SuBusiness business=WebUtil.getLoginUser(request);//登录人信息

            business=SuBusinessService.selectByPhone(business.getMobile());

            Map map=new HashMap();

            map.put("sellerBusinessId", business.getId());

            if(StringUtils.isNotBlank(userName)){          

                map.put("userName", userName);

            }else{         

                map.put("userName", null);

            }

            if(StringUtils.isNotBlank(mobile)){        

                map.put("mobile", mobile);

            }else{         

                map.put("mobile", null);

            }

            if(StringUtils.isNotBlank(orderNumber)){           

                map.put("orderNumber", orderNumber);

            }else{         

                map.put("orderNumber", null);

            }

            Date startTime = null;

            Date endTime = null;

            if(StringUtils.isNotBlank(startTime1)){

                String startTimeStr = startTime1+" 00:00:00";

                String endTimeStr = "";

                if(StringUtils.isBlank(endTime1)){

                    endTimeStr =  DateUtil.format(new Date(),"yyyy-MM-dd")+" 23:59:59";

                }else{

                    endTimeStr = endTime1+" 23:59:59";

                }

                startTime = DateUtil.parse(startTimeStr, "yyyy-MM-dd HH:mm:ss");

                endTime = DateUtil.parse(endTimeStr, "yyyy-MM-dd HH:mm:ss");

                map.put("startTime", startTime);

                map.put("endTime", endTime);

            }else{

                map.put("startTime", null);

                map.put("endTime", null);

            }

            if(status.intValue()!=99){

                map.put("status", status); 

            }else {

                if (status.intValue()==0) {

                    map.put("status", 0);

                }else {

                    map.put("status", null);

                }

 

            }

            //进行查询并导出

            List orderList = orderService.queryOnlineList(map);

            if (orderList != null && orderList.size()>0) {//查询的数据不为空就对数据进行导出

                //导出文件的标题

                String title = "商城订单"+DateUtil.format(new Date(), "yyyyMMdd")+".xls";

                //设置表格标题行

                String[] headers = new String[] {"序号","订单号", "花匠名称","订单时间","状态", "消费总额", "退款金额"};

                List dataList = new ArrayList();

                Object[] objs = null;

                for (Order order : orderList) {//循环每一条数据

                    objs = new Object[headers.length];

                    objs[0] = order.getOrderNumber();//序号

                    objs[1] = order.getOrderNumber();//订单号

                    objs[2] = order.getUser().getRealname()+"  "+order.getUser().getMobile();//花匠信息

                    if (order.getCreateDateTime() != null) {

                        objs[3] = DateUtil.format(order.getCreateDateTime(), "yyyy-MM-dd HH:mm:ss");//订单时间                 

                    }else {

                        objs[3] = "无";

                    }

 

                    if (order.getStatus().intValue() == -1) {                  

                        objs[4] = "未发货,申请退款";//状态

                    }

                    if (order.getStatus().intValue() == 0) {                   

                        objs[4] = "已取消";//状态

                    }

                    if (order.getStatus().intValue() == 1) {                   

                        objs[4]="待支付";//状态

                    }

                    if (order.getStatus().intValue() == 2) {                   

                        objs[4] = "待发货";//状态

                    }

 

                    objs[5]=order.getPay();//消费金额

                    if (order.getRefundMoney() != null) {

                        objs[6] = order.getRefundMoney();//退货金额        

                    }else {

                        objs[6] = "0.0";

                    }

                    //数据添加到excel表格

                    dataList.add(objs);

                }

                //使用流将数据导出

                OutputStream out = null;

                try {

                    //防止中文乱码

                    String headStr = "attachment; filename=\"" + new String( title.getBytes("gb2312"), "ISO8859-1" ) + "\"";

                    response.setContentType("octets/stream");

                    response.setContentType("APPLICATION/OCTET-STREAM");

                    response.setHeader("Content-Disposition", headStr);

                    out = response.getOutputStream();

                    //ExportExcel ex = new ExportExcel(title, headers, dataList);//有标题

                    ExportExcelSeedBack ex = new ExportExcelSeedBack(title, headers, dataList);//没有标题

                    ex.export(out);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

    }

需要调用的工具类:ExportExcelSeedBack

         如上操作会出现ExportExcelSeedBack错误:原因是因为是没有定义他的工具类,工具类如下:

 

    public class ExportExcelSeedBack {

 

    //显示的导出表的标题

    private String title;

    //导出表的列名

    private String[] rowName ;

 

    private List  dataList = new ArrayList();

 

    HttpServletResponse  response;

 

 

    //构造方法,传入要导出的数据

    public ExportExcelSeedBack(String title,String[] rowName,List dataList){

        this.dataList = dataList;

        this.rowName = rowName;

        this.title = title;

    }

 

    /*

     * 导出数据

     * */

    public void export(OutputStream out) throws Exception{

        try{

            HSSFWorkbook workbook = new HSSFWorkbook();                     // 创建工作簿对象

            HSSFSheet sheet = workbook.createSheet(title);                  // 创建工作表

 

            // 产生表格标题行

    //          HSSFRow rowm = sheet.createRow(0);

    //          HSSFCell cellTiltle = rowm.createCell(0);

 

            //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面  - 可扩展】

            HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象

            HSSFCellStyle style = this.getStyle(workbook);                  //单元格样式对象

 

    //          sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1)));//合并单元格 

    //          cellTiltle.setCellStyle(columnTopStyle);

    //          cellTiltle.setCellValue(title);

 

            // 定义所需列数

            int columnNum = rowName.length;

            HSSFRow rowRowName = sheet.createRow(0);                // 在索引2的位置创建行(最顶端的行开始的第二行)

 

            // 将列头设置到sheet的单元格中

            for(int n=0;n

                HSSFCell  cellRowName = rowRowName.createCell(n);               //创建列头对应个数的单元格

                cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);             //设置列头单元格的数据类型

                HSSFRichTextString text = new HSSFRichTextString(rowName[n]);

                cellRowName.setCellValue(text);                                 //设置列头单元格的值

                cellRowName.setCellStyle(columnTopStyle);                       //设置列头单元格样式

            }

 

            //将查询出的数据设置到sheet对应的单元格中

            for(int i=0;i

 

                Object[] obj = dataList.get(i);//遍历每个对象

                HSSFRow row = sheet.createRow(i+1);//创建所需的行数(从第二行开始写数据)

 

                for(int j=0; j

                    HSSFCell  cell = null;   //设置单元格的数据类型

                    if(j == 0){

                        cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);

                        cell.setCellValue(i+1);

                    }else{

                        cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);

                        if(!"".equals(obj[j]) && obj[j] != null){

                            cell.setCellValue(obj[j].toString());                       //设置单元格的值

                        }

                    }

                    cell.setCellStyle(style);                                   //设置单元格样式

                }

            }

            //让列宽随着导出的列长自动适应

            for (int colNum = 0; colNum < columnNum; colNum++) {

                int columnWidth = sheet.getColumnWidth(colNum) / 256;

                for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {

                    HSSFRow currentRow;

                    //当前行未被使用过

                    if (sheet.getRow(rowNum) == null) {

                        currentRow = sheet.createRow(rowNum);

                    } else {

                        currentRow = sheet.getRow(rowNum);

                    }

     //                 if (currentRow.getCell(colNum) != null) {

     //                     HSSFCell currentCell = currentRow.getCell(colNum);

    //                      if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {

    //                          int length =     currentCell.getStringCellValue().getBytes().length;

    //                          if (columnWidth < length) {

    //                              columnWidth = length;

    //                          }

    //                      }

    //                  }

                    if (currentRow.getCell(colNum) != null) {

                        HSSFCell currentCell = currentRow.getCell(colNum);

                        if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {

                            int length = 0;

                            try {

                                length = currentCell.getStringCellValue().getBytes().length;

                            } catch (Exception e) {

                                e.printStackTrace();

                            }

                            if (columnWidth < length) {

                                columnWidth = length;

                            }

                        }

                    }

 

                }

                if(colNum == 0){

                    sheet.setColumnWidth(colNum, (columnWidth-2) * 256);

                }else{

                    sheet.setColumnWidth(colNum, (columnWidth+4) * 256);

                }

            }

            if(workbook !=null){

                try{

                    workbook.write(out);

                }catch (IOException e) {

                    e.printStackTrace();

                }

            }

 

        }catch(Exception e){

            e.printStackTrace();

        }

        finally{

            out.close();

        }

 

    }

 

    /*

     * 列头单元格样式

     */   

    public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

 

          // 设置字体

          HSSFFont font = workbook.createFont();

          //设置字体大小

          font.setFontHeightInPoints((short)11);

          //字体加粗

          font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

          //设置字体名字

          font.setFontName("Courier New");

          //设置样式;

          HSSFCellStyle style = workbook.createCellStyle();

          //设置底边框;

          style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

          //设置底边框颜色; 

          style.setBottomBorderColor(HSSFColor.BLACK.index);

          //设置左边框;  

          style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

          //设置左边框颜色;

          style.setLeftBorderColor(HSSFColor.BLACK.index);

          //设置右边框;

          style.setBorderRight(HSSFCellStyle.BORDER_THIN);

          //设置右边框颜色;

          style.setRightBorderColor(HSSFColor.BLACK.index);

          //设置顶边框;

          style.setBorderTop(HSSFCellStyle.BORDER_THIN);

          //设置顶边框颜色; 

          style.setTopBorderColor(HSSFColor.BLACK.index);

          //在样式用应用设置的字体; 

          style.setFont(font);

          //设置自动换行;

          style.setWrapText(false);

          //设置水平对齐的样式为居中对齐; 

          style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

          //设置垂直对齐的样式为居中对齐;

          style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

 

          return style;

 

    }

 

    /* 

     * 列数据信息单元格样式

     */ 

    public HSSFCellStyle getStyle(HSSFWorkbook workbook) {

          // 设置字体

          HSSFFont font = workbook.createFont();

          //设置字体大小

          //font.setFontHeightInPoints((short)10);

          //字体加粗

          //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

          //设置字体名字

          font.setFontName("Courier New");

          //设置样式;

          HSSFCellStyle style = workbook.createCellStyle();

          //设置底边框;

          style.setBorderBottom(HSSFCellStyle.BORDER_THIN);

          //设置底边框颜色; 

          style.setBottomBorderColor(HSSFColor.BLACK.index);

          //设置左边框;  

          style.setBorderLeft(HSSFCellStyle.BORDER_THIN);

          //设置左边框颜色;

          style.setLeftBorderColor(HSSFColor.BLACK.index);

          //设置右边框;

          style.setBorderRight(HSSFCellStyle.BORDER_THIN);

          //设置右边框颜色;

          style.setRightBorderColor(HSSFColor.BLACK.index);

          //设置顶边框;

          style.setBorderTop(HSSFCellStyle.BORDER_THIN);

          //设置顶边框颜色; 

          style.setTopBorderColor(HSSFColor.BLACK.index);

          //在样式用应用设置的字体; 

          style.setFont(font);

          //设置自动换行;

          style.setWrapText(false);

          //设置水平对齐的样式为居中对齐; 

          style.setAlignment(HSSFCellStyle.ALIGN_CENTER);

          //设置垂直对齐的样式为居中对齐;

          style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

 

          return style;

 

          }

       }

 

此时就可以将数据完美导出来

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