一、execl文件导入
1、前端（angular4，多余内容省略）
html文件
<!--导入文件-->
<nz-modal [(nzVisible)]="detailModal1.show" [nzTitle]="detailModal1.title" [nzFooter]="updateModelFooter1"
(nzOnCancel)="handleDetailCancel1()" nzWidth="450px">
<input type="file" (change)="importExcel($event)" multiple="false" accept=".xls,.xlsx,.txt">
</nz-modal>
ts文件
this.file = new FormData();
/** * 选择导入文件 * @param */ importExcel(event: any): void { this.file.append('file', event.target.files[0]); }
/** * 导入 */ importExcel1() { const params = this.file; this.service.importTerminal(params).subscribe((resData: TerminalManageServiceNs.UfastHttpAnyResModel) => { if (resData.code == 0) { this.detailModal1.show = false; this.showMessageService.showToastMessage('操作成功', 'success'); } else { this.showMessageService.showAlertMessage('', resData.message + ':' + resData.value , 'warning'); } }, (error: any) => { this.tableConfig.loading = false; this.showMessageService.showAlertMessage('', error.message, 'error'); }); }
2、后端
工具类
/** * @param entityClass excel中每一行数据的实体类 * @param in excel文件 * @param fields 字段名字 * 需要注意的是这个方法中的map中： * excel表格中每一列名为键，每一列对应的实体类的英文名为值 * @throws Exception * @author Lyy */ public static <T> List<T> ExecltoListXLSX(InputStream in, Class<T> entityClass, Map<String, String> fields) throws Exception { List<T> resultList = new ArrayList<T>(); // XSSFWorkbook workbook = new XSSFWorkbook(in); Workbook workbook = WorkbookFactory.create(in); // Sheet hssfSheet = workbook.getSheetAt(0); //示意访问sheet // excel中字段的中英文名字数组 String[] egtitles = new String[fields.size()]; String[] cntitles = new String[fields.size()]; Iterator<String> it = fields.keySet().iterator(); int count = 0; while (it.hasNext()) { String cntitle = (String) it.next(); String egtitle = fields.get(cntitle); egtitles[count] = egtitle; cntitles[count] = cntitle; count++; } // 得到excel中sheet总数 int sheetcount = workbook.getNumberOfSheets(); if (sheetcount == 0) { workbook.close(); throw new Exception("Excel文件中没有任何数据"); } // 数据的导出 for (int i = 0; i < sheetcount; i++) { // XSSFSheet sheet = workbook.getSheetAt(i); Sheet sheet = workbook.getSheetAt(i); if (sheet == null) { continue; } // 每页中的第二行为标题行，对标题行的特殊处理 Row firstRow = sheet.getRow(0); int celllength = firstRow.getLastCellNum(); String[] excelFieldNames = new String[celllength]; LinkedHashMap<String, Integer> colMap = new LinkedHashMap<String, Integer>(); // 获取Excel中的列名 for (int f = 0; f < celllength; f++) { Cell cell = firstRow.getCell(f); cell.setCellType(Cell.CELL_TYPE_STRING); excelFieldNames[f] = cell.getStringCellValue().trim(); // 将列名和列号放入Map中,这样通过列名就可以拿到列号 for (int g = 0; g < excelFieldNames.length; g++) { colMap.put(excelFieldNames[g], g); } } // 由于数组是根据长度创建的，所以值是空值，这里对列名map做了去空键的处理 colMap.remove(null); // 判断需要的字段在Excel中是否都存在 // 需要注意的是这个方法中的map中：中文名为键，英文名为值 boolean isExist = true; List<String> excelFieldList = Arrays.asList(excelFieldNames); for (String cnName : fields.keySet()) { if (!excelFieldList.contains(cnName)) { isExist = false; break; } } // 如果有列名不存在，则抛出异常，提示错误 if (!isExist) { workbook.close(); throw new Exception("Excel中缺少必要的字段，或字段名称有误"); } // 将sheet转换为list for (int j = 1; j <= sheet.getLastRowNum(); j++) { Row row = sheet.getRow(j); // 根据泛型创建实体类 T entity = entityClass.newInstance(); // 给对象中的字段赋值 for (Map.Entry<String, String> entry : fields.entrySet()) { // 获取中文字段名 String cnNormalName = entry.getKey(); // 获取英文字段名 String enNormalName = entry.getValue(); // 根据中文字段名获取列号 int col = colMap.get(cnNormalName); // 获取当前单元格中的内容 String content = null; if ("trade_time".equals(enNormalName)) { Cell cell = row.getCell(col); Date dateCellValue = cell.getDateCellValue(); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); content = simpleDateFormat.format(dateCellValue); } else if ("vice_no".equals(enNormalName)) { Cell cell = row.getCell(col); cell.setCellType(XSSFCell.CELL_TYPE_STRING); content = cell.getStringCellValue(); } else if ("trade_num".equals(enNormalName)) { Cell cell = row.getCell(col); cell.setCellType(XSSFCell.CELL_TYPE_STRING); content = cell.getStringCellValue(); } else { row.getCell(col).setCellType(Cell.CELL_TYPE_STRING); content = row.getCell(col).toString().trim(); } // 给对象赋值 setValueByName(enNormalName, content, entity); } resultList.add(entity); } } workbook.close(); return resultList; } private static void setValueByName(String fieldName, Object fieldValue, Object o) throws Exception { Field field = getFieldByName(fieldName, o.getClass()); if (field != null) { field.setAccessible(true); // 根据字段类型给字段赋值 if ("terminalNumber".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("simCard".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("supplier".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("workPersonnelName".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("trade_time".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("oil_name".equals(fieldName)) { field.set(o, String.valueOf(fieldValue)); } else if ("trade_num".equals(fieldName)) { field.set(o, Double.valueOf(String.valueOf(fieldValue))); } } else { throw new Exception(o.getClass().getSimpleName() + "类不存在字段名 " + fieldName); } }
service层和controller层就不写了，直接在service层根据业务需求调用工具类