是一个处理微软各种文件格式的开源项目,一般情况下,POI都是用来操作EXCEL文件的 读和写操作
test测试
/*
使用POI操作Excel文件
*/
public class POITest {/*
通过POI创建Excel文件并写入文件内容
*/
public static void write() throws Exception{
//在内存中创建一个excel文件
XSSFWorkbook excel=new XSSFWorkbook();
//在Excel文件中创建一个sheet页
XSSFSheet sheet = excel.createSheet(“info”);
//在sheet中创建行对象,rownum编号从0开始
XSSFRow row = sheet.createRow(1);
//创建单元格并写入文件内容
row.createCell(1).setCellValue(“姓名”);
row.createCell(2).setCellValue(“城市”);//创建一个新行
row = sheet.createRow(2);
row.createCell(1).setCellValue(“张三”);
row.createCell(2).setCellValue(“北京”);row = sheet.createRow(3);
row.createCell(1).setCellValue(“李四”);
row.createCell(2).setCellValue(“南京”);//通过输出流将内存中的Excel文件写入磁盘中
FileOutputStream out=new FileOutputStream(new File(“/Users/renliaoliao/Desktop/info.xlsx”));
excel.write(out);//关闭资源
out.close();
excel.close();
}
/*
通过POI读取Excel文件中的内容
*/
public static void read() throws Exception{
//读取磁盘上以及存在的excel文件
FileInputStream in = new FileInputStream(new File(“/Users/renliaoliao/Desktop/info.xlsx”));
XSSFWorkbook excel = new XSSFWorkbook(in);
//将文本文件读取出来 读取第一个sheet页
XSSFSheet sheet = excel.getSheetAt(0);//获取sheet页中最后一行的行号
int lastRowNum = sheet.getLastRowNum();for (int i=1;i<=lastRowNum;i++){
//获取某一行
XSSFRow row = sheet.getRow(i);
//获取单元格对象
String cellValue1 = row.getCell(1).getStringCellValue();
String cellValue2 = row.getCell(2).getStringCellValue();
System.out.println(cellValue1+" "+cellValue2);
}//关闭资源
in.close();
excel.close();
}
public static void main(String[] args) throws Exception {
//write();
read();
}
}
导出运营数据表数据
/*
* 导出运营数据报表
* */
@Override
public void expo rtBusinessData(HttpServletResponse response) {
//1.查询数据库 获取运营数据
LocalDate dateBegin = LocalDate.now().minusDays(30);
LocalDate dateEnd = LocalDate.now().minusDays(1);
//查询概览数据
BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
//2.通过POI将数据写入到Excel文件中
InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
try {
//基于模板文件创建一个新的excel文件
XSSFWorkbook excel = new XSSFWorkbook(in);
//获取表格标签的sheet页
XSSFSheet sheet = excel.getSheet("Sheet1");
//填充数据--时间
sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"至"+dateEnd);
//获取第四行
XSSFRow row = sheet.getRow(3);
row.getCell(2).setCellValue(businessDataVO.getTurnover());
row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
row.getCell(6).setCellValue(businessDataVO.getNewUsers());
//获得第五行
row = sheet.getRow(4);
row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
//填充明细数据
for (int i = 0; i < 30; i++) {
LocalDate date = dateBegin.plusDays(i);
//查询某一天的营业数据
BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
//获得某一行
row=sheet.getRow(7+i);
row.getCell(1).setCellValue(date.toString());
row.getCell(2).setCellValue(businessData.getTurnover());
row.getCell(3).setCellValue(businessData.getValidOrderCount());
row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
row.getCell(5).setCellValue(businessData.getUnitPrice());
row.getCell(6).setCellValue(businessData.getNewUsers());
}
//3.通过输出流将excel文件下载到客户端浏览器
ServletOutputStream out = response.getOutputStream();
excel.write(out);
//关闭资源
out.close();
excel.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}