java操作EXCEL业务

一、导入依赖的包【maven】

 <!-- 引入poi，解析workbook视图 -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.16</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.14</version>
        </dependency>
        <!-- 处理excel和上面功能是一样的-->
        <dependency>
            <groupId>net.sourceforge.jexcelapi</groupId>
            <artifactId>jxl</artifactId>
            <version>2.6.10</version>
        </dependency>

二、写入

        //第一步，创建一个workbook对应一个excel文件
        HSSFWorkbook workbook = new HSSFWorkbook();
        //第二部，在workbook中创建一个sheet对应excel中的sheet
        HSSFSheet sheet = workbook.createSheet("用户表一");
        //第三部，在sheet表中添加表头第0行，老版本的poi对sheet的行列有限制
        HSSFRow row = sheet.createRow(0);
        //第四步，创建单元格，设置表头
        HSSFCell cell = row.createCell(0);
        cell.setCellValue("用户名");
        cell = row.createCell(1);
        cell.setCellValue("密码");

        //第五步，写入实体数据，实际应用中这些数据从数据库得到,对象封装数据，集合包对象。对象的属性值对应表的每行的值
        for (int i = 0; i < 5; i++) {
            HSSFRow row1 = sheet.createRow(i + 1);
            //创建单元格设值
            row1.createCell(0).setCellValue("张三");
            row1.createCell(1).setCellValue("mima");
        }

        //将文件保存到指定的位置
        try {
            FileOutputStream fos = new FileOutputStream("/Users/**/Documents/user1.xls");
            workbook.write(fos);
            System.out.println("写入成功");
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

三、读取【inputStream】

FtpClientService ftpClientService = new FtpClientService();
        boolean b = ftpClientService.connect("/FTP/**/**/**/**", "192.168.2.11", 21, "COUNT", "PASSWORD");
        InputStream inputStream = ftpClientService.readFtp("user1.xls");


//使用inputStream
        Map map = new HashMap();
        Workbook workbook = Workbook.getWorkbook(inputStream);  //处理输入流
        Sheet sheet = workbook.getSheet(0);// 获取第一个sheet
        int rows = sheet.getRows();   //获取总行号
        String[][] curArr = new String[rows][2];     //存放正确心细
        String[][] errorArr = new String[rows * 2][4];   //存放错误信息
        int curLines = 0;
        int errorLines = 0;
        for (int i = 1; i < rows; i++) {// 遍历行获得每行信息
            String phone = sheet.getCell(0, i).getContents();// 获得第i行第1列信息
            String shortNum = sheet.getCell(1, i).getContents();// 短号
            StringBuffer errorMsg = new StringBuffer();
            System.out.print("\n\nphone= "+phone);
            System.out.print("\n\nshortNum= "+shortNum);

        }