Java之poi导入excel数据

  使用开源poi框架进行导入数据，废话不多说，直接上代码。
1.pom依赖：


    org.apache.poi
    poi-ooxml

2.Controller代码  
   

public AjaxResult importData(MultipartFile file) throws Exception {
        List studentList = new ArrayList<>();
        //根据路径获取这个操作excel表格
        XSSFWorkbook wb = new XSSFWorkbook(file.getInputStream());
        //根据页面index 获取sheet页
        XSSFSheet sheet = wb.getSheetAt(0);
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 1; i <= lastRowNum; i++) {
            XSSFRow row = sheet.getRow(i);
            if (row!= null) {
                List list = new ArrayList<>();
                for (Cell cell : row) {
                    if (cell!=null){
                        cell.setCellType(CellType.STRING);
                        String value = cell.getStringCellValue();
                        if (value!=null && !"".equals(value))
                            list.add(value);
                    }
                }
                if (list.size()>0){
                    Student student = new Student();
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setSex(row.getCell(0).getStringCellValue());
                    student.setAge(Integer.valueOf((int)row.getCell(2).getNumericCellValue()));
                    student.setAddress(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    studentList.add(student);
//                    System.out.println(studentList);
                }
            }
        }
        //调取实体对应的service层新增方法
        studentService.importByExcel(studentList);
        return AjaxResult.success();
    }

以上是后缀为xlsx，将以下代码替换即是后缀为xls的excel

//根据路径获取这个操作excel(后缀为.xls) 

HSSFWorkbook hb = new HSSFWorkbook(file.getInputStream())

//.xls格式 

HSSFSheet sheet = hb.getSheetAt(0);

XSSFRow row = sheet.getRow(i);

嫌麻烦？直接两个都判断的代码 

public AjaxResult importData(MultipartFile file) throws Exception {
        List studentList = new ArrayList<>();
        String fileName = file.getOriginalFilename();
        String name = fileName.substring(0, fileName.indexOf("."));
        String hzm =fileName.substring(name.length()+1);
        if (StringUtils.equals(hzm,"xlsx")) {
        //根据路径获取这个操作excel表格
        XSSFWorkbook wb = new XSSFWorkbook(file.getInputStream());
        //根据页面index 获取sheet页
        XSSFSheet sheet = wb.getSheetAt(0);
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 1; i <= lastRowNum; i++) {
            XSSFRow row = sheet.getRow(i);
            if (row!= null) {
                List list = new ArrayList<>();
                for (Cell cell : row) {
                    if (cell!=null){
                        cell.setCellType(CellType.STRING);
                        String value = cell.getStringCellValue();
                        if (value!=null && !"".equals(value))
                            list.add(value);
                    }
                }
                if (list.size()>0){
                    Student student = new Student();
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setSex(row.getCell(0).getStringCellValue());
                    student.setAge(Integer.valueOf((int)row.getCell(2).getNumericCellValue()));
                    student.setAddress(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    studentList.add(student);
//                    System.out.println(studentList);
                }
            }
        }
    } else if (StringUtils.equals(hzm,"xls")) {
        //根据路径获取这个操作excel表格
        HSSFWorkbook wb = new HSSFWorkbook(file.getInputStream());
        //根据页面index 获取sheet页
        HSSFSheet sheet = wb.getSheetAt(0);
        int lastRowNum = sheet.getLastRowNum();
        for (int i = 1; i <= lastRowNum; i++) {
            HSSFRow row = sheet.getRow(i);
            if (row!= null) {
                List list = new ArrayList<>();
                for (Cell cell : row) {
                    if (cell!=null){
                        cell.setCellType(CellType.STRING);
                        String value = cell.getStringCellValue();
                        if (value!=null && !"".equals(value))
                            list.add(value);
                    }
                }
                if (list.size()>0){
                    Student student = new Student();
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setSex(row.getCell(0).getStringCellValue());
                    student.setAge(Integer.valueOf((int)row.getCell(2).getNumericCellValue()));
                    student.setAddress(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    student.setName(row.getCell(0).getStringCellValue());
                    studentList.add(student);
//                    System.out.println(studentList);
                }
            }
        }
    }
        //调取实体对应的service层新增方法
        studentService.importByExcel(studentList);
        return AjaxResult.success();
    }

 以上就是导入功能，看完理解理解发现也不难！