java poi导出excel

Posted 2023-04-16

参考技术A

用spire.xls.jar也可以导出excel, 代码更简单

import com.spire.xls.ExcelVersion;

import com.spire.xls.Workbook;

import com.spire.xls.Worksheet;




public class InsertArray




    public static void main(String[] args)




        //创建Workbook对象

        Workbook wb = new Workbook();

        //获取第一张工作表

        Worksheet sheet = wb.getWorksheets().get(0);

        //定义一维数据

        String[] oneDimensionalArray = new String[]"苹果", "梨子", "葡萄", "香蕉";

        //将数组从指定单个格开始写入工作表，true表示纵向写入，设置为false为横向写入

        sheet.insertArray(oneDimensionalArray, 1, 1, true);

        //定义二维数组

        String[][] twoDimensionalArray = new String[][]

                "姓名", "年龄", "性别", "学历",

                "小张", "25", "男", "本科",

                "小王", "24", "男", "本科",

                "小李", "26", "女", "本科"

        ;

        //从指定单元格开始写入二维数组到工作表

        sheet.insertArray(twoDimensionalArray, 1, 3);

        //保存文档

        wb.saveToFile("InsertArrays.xlsx", ExcelVersion.Version2016);

   

Java 利用poi 导出excel表格 如何在导出时自由选择路径?

能导出成功，知识代码把路径写死了，想要实现自己选择保存路径。

导出时自由选择路径的代码如下：

1、后台输出Excel文件代码：

OutputStream output = response.getOutputStream();

response.reset();

response.setHeader("Content-disposition", "attachment; filename=" + path);

response.setContentType("Content-Type:application/vnd.ms-excel ");

wb.write(output);

output.close();

2、前端代码：

window.open("getExcelList","_blank");

导出excel数据

* @param id

* @param m

* @return

*/

@RequestMapping("/exportExcel")

public void exportExcel(@RequestParam("id") Integer id, Model m,HttpServletRequest req, HttpServletResponse resp)

try

ExportExcel<P2pLoanPlanVo> ex = new ExportExcel<P2pLoanPlanVo>();

String[] headers = "最迟还款日", "还款金额","剩余几天","逾期几天", "罚息","是否垫付","状态","是否发放收益";

List<P2pLoanPlanVo> dataset = new ArrayList<P2pLoanPlanVo>();

List<P2pLoanPlan> plans = this.planService.getListByLoan(id);

for (int i = 0; i < plans.size(); i++)

P2pLoanPlanVo p2pLoanPlanVo = new P2pLoanPlanVo();

p2pLoanPlanVo.setRepayDate(plans.get(i).getRepayDate());

p2pLoanPlanVo.setRepayAmount(plans.get(i).getRepayAmount());

if(plans.get(i).getRepayDays() >= 0 && plans.get(i).getStatus() == 0)

p2pLoanPlanVo.setRepayDays(plans.get(i).getRepayDays());

else

p2pLoanPlanVo.setRepayDays(0);

if(plans.get(i).getRepayDays() < 0 && plans.get(i).getStatus() == 0)

p2pLoanPlanVo.setRepayYqDays(-plans.get(i).getRepayDays());

else

p2pLoanPlanVo.setRepayYqDays(0);

参考技术A 主要代码如下：
后台输出Excel文件代码：
OutputStream output = response.getOutputStream();
response.reset();
response.setHeader("Content-disposition", "attachment; filename=" + path);
response.setContentType("Content-Type:application/vnd.ms-excel ");
wb.write(output);
output.close();
前端代码：window.open("getExcelList","_blank"); 参考技术B 做个临时文件，在重定向到这个临时文件，浏览器就会选择下载追问

我不明白，没学这个多久，望耐心解释~十分感谢~

追答

在servlet中，

//把上边的改成
try
    wb.write(response.getOutputStream());

参考技术C 可以用pageoffice导出excel. pageoffice 调用的是本地的office,导出excel可以弹出另存的对话框,用户可以选择自己想要的位置进行保存.