校验上传的文件是否是Excel文件及是否是xls或xlsx格式工具类
import org.apache.poi.poifs.filesystem.FileMagic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import java.io.InputStream;
import java.util.Objects;
public class EasyExcelUtil {
private static final Logger logger = LoggerFactory.getLogger(EasyExcelUtil.class);
private static Boolean checkExcelFile(MultipartFile file) throws Exception {
Boolean result = false;
try {
String fileName = file.getOriginalFilename();
if (fileName == null) {
logger.error("fileName is null");
throw new Exception("未获取到文件名");
}
String fileSuffixName = fileName.substring(fileName.lastIndexOf(".") + 1);
if (fileSuffixName == null) {
logger.error("Illegal file");
throw new Exception("非法文件");
}
if (!"xls".equals(fileSuffixName) && !"xlsx".equals(fileSuffixName)) {
logger.error("file format error,please upload an Excel file in xls or xlsx format");
throw new Exception("文件格式错误,请上传xls或xlsx格式的Excel文件");
}
InputStream inputStream = file.getInputStream();
InputStream fileMagics = FileMagic.prepareToCheckMagic(inputStream);
FileMagic fileMagic = FileMagic.valueOf(fileMagics);
if (Objects.equals(fileMagic, FileMagic.OLE2) || Objects.equals(fileMagic, FileMagic.OOXML)) {
result = true;
} else {
logger.error("file format error,please upload an Excel file in xls or xlsx format");
throw new Exception("文件格式错误,请上传xls或xlsx格式的Excel文件");
}
} catch (Exception e) {
logger.error("请上传xls或xlsx格式的Excel文件", e);
throw e;
}
return result;
}
}