Java导入excel

需要先倒入POI的jar

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.8</version>
</dependency>

public String exportCharge(MultipartHttpServletRequest request) {
        try {
            //得到上传的文件
            MultipartFile fileFile = request.getFile("file");
            //转换成输入流
            InputStream in = fileFile.getInputStream();
            XSSFWorkbook readWb = new XSSFWorkbook(in);
            //遍历该表格中所有的工作表，i表示工作表的数量 getNumberOfSheets表示工作表的总数

            XSSFSheet sheet = readWb.getSheetAt(0);
             //循环行Row
            for (int rowNum = 1; rowNum <= sheet.getLastRowNum(); rowNum++) {
                System.out.println("当前插入第"+rowNum);
                XSSFRow hssfRow = sheet.getRow(rowNum);
                AllPhone allPhone=new AllPhone();
                if (hssfRow != null) {
                    for (int colNum = 0; colNum < hssfRow.getPhysicalNumberOfCells(); colNum++) {
                        String tmp = hssfRow.getCell(colNum).toString();
                        if (colNum == 0) {
                            int begin = tmp.indexOf(".");
                        } else if (colNum == 1) {
                            allPhone.setStage(tmp);
                        }else if (colNum == 2) {

                        }else if (colNum == 3) {
                            allPhone.setCardtype(tmp);
                        }else if (colNum == 4) {


                        }else if (colNum == 5) {
                            if(StringUtil.isNotEmpty(tmp)){
                                allPhone.setPostcode(tmp);
                            }
                        }
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return "ok";
    }