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+package org.springblade.client.school.util;
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+
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+import com.alibaba.excel.annotation.ExcelProperty;
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+import com.alibaba.nacos.api.utils.StringUtils;
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+import org.apache.poi.ss.usermodel.*;
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+import org.springframework.web.multipart.MultipartFile;
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+
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+import java.io.BufferedInputStream;
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+import java.lang.reflect.Field;
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+import java.text.SimpleDateFormat;
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+import java.util.ArrayList;
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+import java.util.HashMap;
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+import java.util.List;
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+import java.util.Map;
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+
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+/**
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+ * @author: xxx
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+ * @createTime: 2021/12/07 17:07
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+ * @company: https://www.xxx.cn
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+ * @description:
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+ */
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+public class ExcelCheck {
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+
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+ /**
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+ * 检验导入Excel的格式
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+ * @param excel
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String checkExcelPattern(MultipartFile excel,Object object) throws Exception {
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+ if(excel == null || excel.isEmpty()){
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+ throw new Exception("导入文件不能为空！");
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+ }
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+ //用于拼接校验结果
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+ StringBuilder builder = new StringBuilder();
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+ //大小校验
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+ /*if((excel.getSize()/1048576)>2){
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+ builder.append("上传文件仅支持2M以内的Excel文件；");
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+ }*/
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+ //校验文件格式，必须为excel文件
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+ String fileName = excel.getOriginalFilename();
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+ String suffix = fileName.substring(fileName.lastIndexOf(".") + 1);
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+ if (!"xlsx".equals(suffix)) {
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+ builder.append("导入文件只支持xlsx类型后缀；");
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+ }
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+ //校验文件表头
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+ BufferedInputStream fin = new BufferedInputStream(excel.getInputStream());
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+ Workbook wb = null;
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+ try{
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+ wb = WorkbookFactory.create(fin);;
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+ }catch(Exception e){
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+ wb = WorkbookFactory.create(fin);;
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+ }
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+ //XSSFWorkbook wb = new XSSFWorkbook(fin);导致出现异常
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+ //columnName = {"姓名", "性别", "年级", "班级","身份证号","学籍号","学工号","性格","家庭情况","操行等等","特长","标签"};
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+ //获取注解当中的值
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+ Map<String, List<String>> annotationValue = getAnnotationValue(object);
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+ List<String> annotationName = annotationValue.get("annotationName");
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+ //获取到的实体注解名称顺序要与excel表头顺序保持一样
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+ String[] columnName = annotationName.toArray(new String[]{});
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+ Sheet sheet = wb.getSheetAt(0);
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+ Row row = sheet.getRow(0);
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+ if (row != null && row.getLastCellNum() >= columnName.length) {
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+ int lastCellNum = row.getLastCellNum();
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+ for (int idx = 0; idx < lastCellNum; idx++) {
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+ String value = getCellValue(row.getCell(idx)).trim();
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+ if (idx < columnName.length) {
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+ if (StringUtils.isBlank(value) || !columnName[idx].equals(value)) {
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+ builder.append("第" + (idx + 1) + "列表头应为" + columnName[idx]+"!");
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+ }
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+ } else {
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+ if (idx == columnName.length) {
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+ builder.append("导入文件只应该有:"+ columnName.length+"!");
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+ }
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+ }
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+ }
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+ } else {
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+ builder.append("上传文件首行不能为空，且应与模板文件表头保持一致；");
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+ }
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+ if(builder.length()>0){
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+ builder.append("请下载模板按照模板表头顺序进行上传!");
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+ //builder.setCharAt(builder.length()-1, '！');
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+ }
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+ return builder.toString();
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+ }
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+
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+
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+ /**
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+ * 获取cell值
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+ *
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+ * @param cell
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+ * @return
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+ */
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+ private static String getCellValue(Cell cell) {
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+ String cellValue = "";
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+ // 以下是判断数据的类型
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+ switch (cell.getCellType()) {
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+ case Cell.CELL_TYPE_NUMERIC: // 数字
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+ if (DateUtil.isCellDateFormatted(cell)) {
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+ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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+ cellValue = sdf.format(DateUtil.getJavaDate(cell.getNumericCellValue())).toString();
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+ } else {
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+ DataFormatter dataFormatter = new DataFormatter();
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+ cellValue = dataFormatter.formatCellValue(cell);
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+ }
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+ break;
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+ case Cell.CELL_TYPE_STRING: // 字符串
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+ cellValue = cell.getStringCellValue();
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+ break;
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+ case Cell.CELL_TYPE_BOOLEAN: // Boolean
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+ cellValue = cell.getBooleanCellValue() + "";
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+ break;
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+ case Cell.CELL_TYPE_FORMULA: // 公式
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+ cellValue = cell.getCellFormula() + "";
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+ break;
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+ case Cell.CELL_TYPE_BLANK: // 空值
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+ cellValue = "";
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+ break;
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+ case Cell.CELL_TYPE_ERROR: // 故障
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+ cellValue = "非法字符";
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+ break;
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+ default:
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+ cellValue = "未知类型";
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+ break;
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+ }
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+ return cellValue;
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+ }
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+ /**
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+ * 获取该注解对象的属性值(字段名称和注解的value值)
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+ * @param object
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+ * @return
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+ */
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+ public static Map<String,List<String>> getAnnotationValue(Object object) {
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+ Map<String,List<String>>map=new HashMap<>();
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+ List<String> fieldList=new ArrayList<>();
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+ List<String> annotationList=new ArrayList<>();
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+ //StudentVO studentVO = new StudentVO();
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+ Field[] fields = object.getClass().getDeclaredFields();
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+ for(int i = 0 ; i < fields.length ; i++) {
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+ //设置是否允许访问，不是修改原来的访问权限修饰词。
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+ fields[i].setAccessible(true);
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+ ExcelProperty annotation = fields[i].getAnnotation(ExcelProperty.class);
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+ String[] value = annotation.value();
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+ for (String s : value) {
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+ annotationList.add(s);
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+ }
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+ fieldList.add(fields[i].getName());
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+ }
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+ map.put("fieldName",fieldList);
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+ map.put("annotationName",annotationList);
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+ return map;
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+ }
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+
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+}
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lazhaoqian