EXCL导入导出简易功能

本人记性比较差，为了方便快速开发EXCL导入导出功能，记录一下EXCL基本代码

package com.depoo.npcCustomer.controller.committeeManagement;


import org.apache.http.entity.ContentType;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Test {
    public static void main(String[] args) throws IOException {
        //由于上传文件格式都是MultipartFile  所以把File 转换成 MultipartFile
        File file = new File("d:\\ss.xls");
        FileInputStream fileInputStream = new FileInputStream(file);
        MultipartFile multipartFile = new MockMultipartFile(file.getName(), file.getName(),
                ContentType.APPLICATION_OCTET_STREAM.toString(), fileInputStream);
        Test.importExlce(multipartFile);

        //导出
//        Test.importExlce(HttpServletResponse respon);
    }

    /**
     * EXCL 导入
     *
     * @param file
     * @return void
     * @throws
     * @Date 2019/11/27 10:32
     */
    public static void importExlce(MultipartFile file) throws IOException {
        Workbook workbook = null;
        try { // excl 2007导入
            workbook = new HSSFWorkbook(file.getInputStream()); // 创建工作薄
        } catch (Exception e) {
            workbook = new XSSFWorkbook(file.getInputStream());
        }
        Sheet sheet = workbook.getSheetAt(0);
        //sheet.getLastRowNum();//返回最后一行的索引，即比行总数小1
        // 如果sheet中一行数据都没有则返回-1，只有第一行有数据则返回0，最后有数据的行是第n行则返回 n-1；
        int totalRow = sheet.getLastRowNum();
        Row row;// 对应excel的行
        Cell cell;// 对应excel的列
        for (int i = 0; i <= totalRow; i++) {
            //行
            String rowNum = (i + 1) + "";
            row = sheet.getRow(i);
            //返回的是最后一列的列数，即等于总列数
            // row中一列数据都没有则返回-1，只有第一列有数据则返回1，最后有数据的列是第n列则返回 n；
            int totaleCell = row.getLastCellNum();
            try {
                //列
                for (int j = 0; j < totaleCell; j++) {
                    cell = row.getCell(j);
                    System.out.print("第" + rowNum + "行第" + (j + 1) + "列的值:" + cell.getStringCellValue() + "\t");
                    if (j == (totaleCell - 1)) {
                        System.out.println();
                    }
                }
            } catch (Exception e) {
                System.out.println("请设置EXCEL文件单元格类型为文本类型" +
                        "【步骤：选中整列单元格)->数据->分列->下一步->下一步->列数据格式---选择文本,完成即可】");
            }
        }
    }

    /**
     * excl 导出
     *
     * @param response
     * @return void
     * @throws
     * @Author luyatao
     * @Date 2019/11/27 10:37
     */
    public static void importExlce(HttpServletResponse response) throws IOException {
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一个表格
        HSSFSheet sheet = workbook.createSheet("测试excl");
        // 设置表格默认列宽度为15个字节
        int defaultColumnWidth = 20;
        sheet.setDefaultColumnWidth(defaultColumnWidth);
        // 创建 标题所在行
        HSSFRow row0 = sheet.createRow(0);
        row0.setHeight((short) 500);
        HSSFCell tcell = row0.createCell(0);
        tcell.setCellValue("测试");
        Test.exportExcelofCustomer(response, workbook, "测试EXCL导出");
    }

    /**
     * 导出excel并弹出下载(客户列表)
     *
     * @param response
     * @param workbook
     * @param fileName
     */
    public static void exportExcelofCustomer(HttpServletResponse response, Workbook workbook, String fileName) {
        // 弹出下载
        ByteArrayOutputStream os = null;
        InputStream is = null;
        OutputStream out = null;
        try {
            // 将 excel转 为流
            os = new ByteArrayOutputStream();
            workbook.write(os);
            is = new ByteArrayInputStream(os.toByteArray());
            // 设置response参数，可以打开下载页面
            response.reset();
            response.setCharacterEncoding("utf-8");
            response.setContentType("application/vnd.ms-excel");
            DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
            response.setHeader("Content-Disposition", "attachment;fileName="
                    + new String((fileName
                    + dateFormat.format(new Date()) + ".xls")
                    .getBytes(), "iso-8859-1"));
            out = response.getOutputStream();
            byte[] b = new byte[2048];
            int length;
            while ((length = is.read(b)) > 0) {
                out.write(b, 0, length);
            }
        } catch (IOException ioE) {
            ioE.printStackTrace();
        } finally {
            try {
                if (os != null) {
                    os.close();
                }

                if (is != null) {
                    is.close();
                }

                if (out != null) {
                    out.close();
                }

            } catch (IOException ioE) {
                ioE.printStackTrace();
            }
        }
    }
}

这个类用到的jar 包有poi-3.10-FINAL-20140208.jar，httpcore-4.4.1.jar，spring-test-3.2.0.RELEASE.jar