Springboot & Mybatis 构建restful 服务四

        <dependency>

             <groupId>org.apache.poi</groupId>  

             <artifactId>poi-ooxml</artifactId>  

             <version>3.5-FINAL</version>  

        </dependency>

    @ApiOperation(value="查询所有账户余额等信息，并导出在 excel 表格中")

    @RequestMapping(value="/accountsfile",method = RequestMethod.GET)

    public boolean wSelectAll(HttpServletResponse response){

        logg.info("write a file that select accounts "); 

        List<SettleAccount> list = null;

        boolean flag = false;

        // 获取所有账户信息

        list = iSY.selectAccounts();

        // 判断是否存在账户

        if(list == null)

            logg.warn("not found accounts");

        else{

            // 创建表对象

            HSSFWorkbook workBook = new HSSFWorkbook();

            ServletOutputStream fileOut = null;

            try {

                // 获取输出流对象

                fileOut = response.getOutputStream();

                // 创建 sheet

                HSSFSheet sheet = workBook.createSheet();

                // 设置表格第一行的字段名

                HSSFRow row = sheet.createRow(0);

                int i =1;

                row.createCell(0).setCellValue("账户编号");

                row.createCell(1).setCellValue("账户名");

                row.createCell(2).setCellValue("客户编号");

                row.createCell(3).setCellValue("短信余额");

                for (SettleAccount acc : list) {

                    HSSFRow rowi = sheet.createRow(i++);

                    rowi.createCell(0).setCellValue(acc.getAccountcode());

                    rowi.createCell(1).setCellValue(acc.getAccountname());

                    rowi.createCell(2).setCellValue(acc.getCustomercode());

                    rowi.createCell(3).setCellValue(acc.getSmsnum().doubleValue());

                }

                workBook.write(fileOut);

                return true;

            } catch (FileNotFoundException e) {

                logg.error("create table error ---- " + e.getMessage());

                e.printStackTrace();

                return false;

            } catch (IOException e) {

                logg.error("create table error ---- " + e.getMessage());

                e.printStackTrace();

                return false;

            } finally {

                try {

                    fileOut.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

        return flag;

    }

#cd 项目所在目录

cd /Users/pengsijia/Documents/pro/xm/AccountBalance

mvn clean package

cd target

mkdir /Users/pengsijia/Desktop/t/

#将 tar 包复制到自己指定目录(/Users/pengsijia/Desktop/t/)

cp AccountBalance-0.0.1-SNAPSHOT.tar /Users/pengsijia/Desktop/t/

#cd 到上个操作指定的目录

cd /Users/pengsijia/Desktop/t

#解压 tar 包

tar -xvf AccountBalance-0.0.1-SNAPSHOT.tar

#此时可查看目录结构如要求所示

ll

#运行 可执行jar，测试结果

java -jar AccountBalance-0.0.1-SNAPSHOT.jar

#

#打开浏览器

http://localhost:8999/accountsfile

#在下载对话框中指定文件名和保存路径

#

#返回上个 iterm 窗口，control+c 结束服务