SpringBoot导出Excel

秒速五厘米 2021-12-11 05:43 387阅读 0赞

页面样式，这里结合通过选择下拉框进行导出：

![20190710151918853.png][]

当点击时传值跳转方法，不要用ajax跳转，无反应：

$("#templateExport").click(function(){
                var areaId = $("#areas").val();
                var loadLayerIndex = "";
                if($("#areas").val() == null){
                    window.open(get_excel_model);
                    return false;
                }
                window.location.href="/room/CustomerExport?areaId="+areaId;
            });

下面创建一个导出Excel工具类：

package com.ktamr.common.utils.export;
    
    import org.apache.poi.hssf.usermodel.*;
    import org.apache.poi.ss.usermodel.HorizontalAlignment;
    
    public class ExcelUtil {
        /**
         * 导出Excel
         * @param sheetName sheet名称
         * @param title 标题
         * @param values 内容
         * @param wb HSSFWorkbook对象
         * @return
         */
        public static HSSFWorkbook getHSSFWorkbook(String sheetName, String []title, String [][]values, HSSFWorkbook wb){
    
            // 第一步，创建一个HSSFWorkbook，对应一个Excel文件
            if(wb == null){
                wb = new HSSFWorkbook();
            }
    
            // 第二步，在workbook中添加一个sheet,对应Excel文件中的sheet
            HSSFSheet sheet = wb.createSheet(sheetName);
    
            // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制
            HSSFRow row = sheet.createRow(0);
    
            // 第四步，创建单元格，并设置值表头 设置表头居中
            HSSFCellStyle style = wb.createCellStyle();
            style.setAlignment(HorizontalAlignment.CENTER); // 创建一个居中格式
    
            //声明列对象
            HSSFCell cell = null;
    
            //创建标题
            for(int i=0;i<title.length;i++){
                cell = row.createCell(i);
                cell.setCellValue(title[i]);
                cell.setCellStyle(style);
            }
    
            //创建内容
            for(int i=0;i<values.length;i++){
                row = sheet.createRow(i + 1);
                for(int j=0;j<values[i].length;j++){
                    //将内容按顺序赋给对应的列对象
                    row.createCell(j).setCellValue(values[i][j]);
                }
            }
            return wb;
        }
    }

Collectorller控制器代码：

//发送响应流方法
        public void setResponseHeader(HttpServletResponse response, String fileName) {
            try {
                try {
                    fileName = new String(fileName.getBytes(), "UTF-8");
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                response.setContentType("application/octet-stream;charset=UTF-8");
                response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
                response.addHeader("Pargam", "no-cache");
                response.addHeader("Cache-Control", "no-cache");
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    
        @RequestMapping("/CustomerExport")
        @ResponseBody
        public void customerExport(HttpServletResponse response, Integer areaId) throws Exception {
            List<HaRoom> rooms = haRoomService.customExport(areaId);
    
            //excel标题
            String[] title = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20"};
    
            //excel文件名
            String fileName = "kt-userTable" + System.currentTimeMillis() + ".xls";
    
            //sheet名
            String sheetName = "sheet1";
    
            String[][] content = new String[rooms.size()][];
            for (int i = 0; i < rooms.size(); i++) {
                content[i] = new String[title.length];
                HaRoom obj = rooms.get(i);
                //捕捉异常，如果值为空赋空值
                try {
                    content[i][0] = obj.getHaCustom().getCustNo(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][0] = "";
                }
                try {
                    content[i][1] = obj.getHaCustom().getName();
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][1] = "";
                }
                content[i][2] = obj.getHaArea().getHaName(); 
                content[i][3] = obj.getHaBuilding().getName(); 
                content[i][4] = obj.getName(); 
                try {
                    content[i][5] = String.valueOf(obj.getHaMeter().getMeterNumber()); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][5] = "";
                }
                try {
                    content[i][6] = obj.getHaMeter().getMeterChannel().toString(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][6] = "";
                }
                try {
                    content[i][7] = obj.getHaMeter().getMeterSequence().toString(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][7] = "";
                }
                try {
                    content[i][8] = String.valueOf(obj.getHaMeter().getVendorId()); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][8] = "";
                }
                try {
                    content[i][9] = obj.getHaCentor().getCentorNo(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][9] = "";
                }
                try {
                    content[i][10] = obj.getHaCollector().getNconf().toString(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][10] = "";
                }
                try {
                    content[i][11] = obj.getHaMetertype().getName(); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][11] = "";
                }
                try {
                    content[i][12] = String.valueOf(obj.getHaMeter().getIsBranch()); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][12] = "";
                }
                try {
                    content[i][13] = String.valueOf(obj.getHaMeter().getGnumber()); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][13] = "";
                }
                try {
                    content[i][14] = String.valueOf(obj.getHaMeter().getStartTime()); 
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][14] = "";
                }
    
                try {
                    content[i][15] = obj.getHaPricestandard().getName();
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][15] = "";
                }
                try {
                    content[i][16] = String.valueOf(obj.getHaMeter().getRate());
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][16] = "";
                }
                try {
                    content[i][17] = obj.getHaCustom().getSex();
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][17] = "";
                }
                try {
                    content[i][18] = obj.getHaCustom().getMobil();
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][18] = "";
                }
                try {
                    content[i][19] = String.valueOf(obj.getHaCustom().getBalance());
                } catch (Exception e) {
                    e.printStackTrace();
                    content[i][19] = "";
                }
            }
    
            //创建HSSFWorkbook
            HSSFWorkbook wb = ExcelUtil.getHSSFWorkbook(sheetName, title, content, null);
    
            //响应到客户端
            try {
                this.setResponseHeader(response, fileName);
                OutputStream os = response.getOutputStream();
                wb.write(os);
                os.flush();
                os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

导出Excel效果图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70][]

[20190710151918853.png]: /images/20211211/fcc418b76e294a37b48470ec406a881f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70]: /images/20211211/593230cea34849e3a6f63fba869a8b9b.png