工具类-操作文件

package com.toltech.mczhdj.commons.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;
import com.toltech.boot.common.enums.BasicStatu;
import com.toltech.boot.common.enums.Boolflag;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import com.toltech.mczhdj.entity.group.Personnel;

public class ExcelUtils {
	private static Logger logger = LoggerFactory.getLogger(ExcelUtils.class);
	/**
	 * 通用模板下载
	 * 
	 * @param title
	 * @param properties
	 * @return
	 * @throws IOException
	 */
	public static byte[] commonExcelr(String title, List properties) throws IOException {
		byte[] byteArray = null;
		try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
			HSSFWorkbook wb = new HSSFWorkbook();
			HSSFSheet sheet = wb.createSheet(title);
			HSSFRow row = sheet.createRow(0);
			HSSFCellStyle style = wb.createCellStyle();
			style.setAlignment(HorizontalAlignment.CENTER);
			HSSFCell cell = null;
			for (int i = 0; i < properties.size(); i++) {
				cell = row.createCell(i);
				cell.setCellValue(properties.get(i));
			}
			wb.write(os);
			wb.close();
			byteArray = os.toByteArray();
			return byteArray;
		}
	}

	/**
	 * 党员人员上传
	 * @param file
	 * @param msg
	 * @param
	 * @return
	 * @throws Exception
	 */
	public static List readPersonnels(MultipartFile file, List msg) throws Exception {
		if (file == null || file.getSize() == 0)
			return null;
		List personnels = new ArrayList();
		Date date = new Date();
		// 文件名
		String fileName = file.getOriginalFilename();
		if (fileName.endsWith(".xlsx") || fileName.endsWith(".xls")) {
			// 获取Excel文件对象
			Workbook wb = WorkbookFactory.create(file.getInputStream());
			// 获取文件指定工作表，默认第一个
			Sheet sheet = wb.getSheetAt(0);
			// 遍历行数(行记录，从0开始,首行记录数+1)
			w: for (int i = 1; i < sheet.getLastRowNum() + 1; i++) {
				// 每一行对应一个list
				List list = new ArrayList();
				// 创建一个行对象
				Row row = sheet.getRow(i);
				if (row == null || row.getLastCellNum() == -1) {
					break w;
				}
				// 遍历一行中的每个字段
				int max = sheet.getRow(1).getLastCellNum();
				for (int j = 0; j < max; j++) {
					// 为每一个字段创建一个单元格对象
					Cell cell = row.getCell((short) (j));
					if (cell == null) {
						list.add("empty");
						msg.add("第" + (i) + "行" + "第" + j + "列为空");
					}else{
						// 获取cell数据
						String data = getCellType(cell);
						if(StringUtils.isNotBlank(data)){
							list.add(data);
						}else{
							list.add("empty");
							msg.add("第" + (i) + "行" + "第" + j + "列为空");
						}
					}
				}

				Personnel personnel = new Personnel();
				for (int j = 0; j < row.getLastCellNum(); j++) {
					String data = list.get(j);
					if(!data.equals("empty")){
						switch (j) {
							case 0:
								personnel.setSname(data);
								break;
							case 1:
								Date backupTime = DateUtils.addYears(date,  -(Integer.parseInt(list.get(1))));
								personnel.setBirthAt(backupTime);
								break;
							case 2:
								personnel.setJoinPartyAt(DateUtils.parseDate(list.get(2),"yyyy-MM-dd hh:mm:ss"));
								break;
							case 3:
								personnel.setMobile(data);
								break;
							case 4:
								personnel.setOutline(data);
								break;
							default:
								break;
						}
					}
				}
				personnel.setUuid(UUID.randomUUID().toString());
				personnel.setStatus(BasicStatu.NORMAL);
				personnel.setHasMove(Boolflag.FALSE);
				personnels.add(personnel);
			}
			wb.close();
		}
		return personnels;
	}

	/**
	 * EXCEL中的CELL值转换
	 *
	 * @param cell
	 * @return
	 */
	public static String getCellType(Cell cell) {
		logger.debug("cell type >>>>>>> {}", cell.getCellType());
		String result = null;
		switch (cell.getCellType()) {
		case NUMERIC: // 数字类型，日期类型
			result = dealNum(cell);
			break;
		case STRING: // 字符串类型
			result = cell.getStringCellValue();
			result = dealStr(result);
			break;
		case FORMULA: // 公式
			result = cell.getCellFormula();
			break;
		default:
			result = "";
			break;
		}
		return result;
	}

	/**
	 * 处理数值类型
	 *
	 * @param cell
	 * @return
	 */
	public static String dealNum(Cell cell) {
		String str = "";
		if (!DateUtil.isCellDateFormatted(cell)) {
			str = new DecimalFormat("0").format(cell.getNumericCellValue());
		}else {
			Date d = cell.getDateCellValue();
			DateFormat formater = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
			str = formater.format(d);
		}
		return str;
	}

	/**
	 * 处理字符串
	 *
	 * @param str
	 * @return
	 */
	public static String dealStr(String str) {
		if (StringUtils.isBlank(str)) {
			str = "";
		}
		return str;
	}

}