关于excel

天才第一步 导入依赖库
<dependency>
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-base</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-annotation</artifactId>
    <version>4.1.0</version>
</dependency>

第二步

public void read() {
File file = new File("/admin/lee/abc.xlsx");
FileInputStream fileInputStream = null;
try {
fileInputStream = new FileInputStream(file);
XSSFWorkbook sheets = new XSSFWorkbook(fileInputStream);
XSSFSheet sheet0 = sheets.getSheet("Sheet0");
int lastRowNum = sheet0.getLastRowNum();
for (int i = 1; i <= lastRowNum; i++) {
try {
ExploreOrder order = new ExploreOrder();
XSSFRow row1 = sheet0.getRow(i);
XSSFCell cell = row1.getCell(0);
cell.setCellType(CellType.STRING);
String stringCellValue = cell.getStringCellValue();
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}

第三步

public void sign(HttpServletRequest request, HttpServletResponse response) {
try {
String filename = "sign" + System.currentTimeMillis() + ".xls";
Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), ExploreTemplate.class, orderList);
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + filename);
log.info("down start:" + filename);
workbook.write(response.getOutputStream());
log.info("down end:" + filename);
} catch (IOException e) {
log.info("exportOrderList", e);
}
}

第四步

@Data

@ExcelTarget("ExploreTemplate")

public class ExploreTemplate implements Serializable {
private static final long serivalVersionUID = 1L;

@Excel(name = "id", orderNum = "0", width = 20)
private Integer userId;
@Excel(name = "是否开通", orderNum = "1", width = 15)
private String state;
@Excel(name = "开通时间", orderNum = "2", width = 20)
private String openTime;
}

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