Springboot模板导出excel

项目搭建

springboot >2.2.2.RELEASE

pom.xml导入POI

<dependency>
		<groupId>org.apache.poi</groupId>
		<artifactId>poi</artifactId>
		<version>3.13</version>
</dependency>
<dependency>
		<groupId>org.apache.poi</groupId>
		<artifactId>poi-ooxml</artifactId>
		<version>3.13</version>
</dependency>

代码

private void createWJWFile(List<Map<String, Object>> list, String path) throws IOException {
        FileInputStream fileInputStream = null;
        HSSFWorkbook workbook = null;
        FileOutputStream fileOutputStream = null;

        try {
            //将模板复制到下载文件夹中并读取
            String basePath = this.getClass().getResource("/").getPath().substring(1);
            fileInputStream = new FileInputStream(basePath+"temp/demo.xls");
            workbook = new HSSFWorkbook(fileInputStream);

            //写入内容
            //获取sheet
            HSSFSheet sheet = workbook.getSheetAt(0);
            HSSFCell cellTitle = sheet.getRow(0).getCell(0);
            String title = cellTitle.getStringCellValue();
            cellTitle.setCellValue(format(title,"time", DateUtils.simpleDateFormatTime0.format(new Date())));
            int i =1;
            //第一二行为表头，数据从第三行开始
            int rowIndex = 2;
            for(Map<String,Object> map:wjwList){
                HSSFRow tempRow = sheet.createRow(rowIndex);
                //序号
                tempRow.createCell(0).setCellValue(i+"");
                tempRow.createCell(0).setCellValue(map.get("name").toString());
                rowIndex++;
                i++;
            }

            String fileName = path + "/demo.xls";
            //将写入内容更新到excel
            fileOutputStream = new FileOutputStream(fileName);
            workbook.write(fileOutputStream);
            fileOutputStream.flush();
        }catch (Exception ex){
            ex.printStackTrace();
        }finally {
            if(workbook!=null)
                workbook.close();
            if(fileInputStream!=null)
                fileInputStream.close();
            if(fileOutputStream!=null)
                fileOutputStream.close();
        }
    }

• 参数list为导出数据
• 参数path为导出文件路径
• 项目根目录下temp/demo.xls为模板文件，第一行第二行为表头