将Excel文件一键解析为list对象集合

调用代码：

@Override
public List importExcel(String accountNo, MultipartFile file) {
    List virtualSettleAccountExcelDataList=null;
    try {
        String name = file.getOriginalFilename();
        if (!name.contains(".xls") && !name.contains(".xlsx")) {
            throw new Exception("文件格式不正确");
        }
        //导入的字段以及对应的值
        Map titleMap = new HashMap();
        titleMap.put("订单编号", "virtualAccountAppId");
        titleMap.put("新网客户虚户", "virtualAccountNo");
        //要校验必填的数据
        Map checkMap = new HashMap();
        checkMap.put("virtualAccountAppId","订单编号");
        checkMap.put("virtualAccountNo","新网客户虚户");

        virtualSettleAccountExcelDataList= ExcelUtil.excelToDataList
                (file.getInputStream(),name,VirtualSettleAccountExcelData.class,titleMap,checkMap);
    } catch (Exception ex) {
        logger.warn("解析虚户数据 error" ,ex.getMessage(), ex);
    }
    return virtualSettleAccountExcelDataList;
}

ExcelUtil封装类代码：

package geex.fin.acc.utils;

import com.google.common.collect.Lists;
import jxl.read.biff.BiffException;
import net.sf.json.JSONObject;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.*;


public class ExcelUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(ExcelUtil.class);

    private final static String xls = "xls";
    private final static String xlsx = "xlsx";

    /**
     *
     * @param row          excel中的某一行
     * @param list         excel一行数据对应的MerchantImportReq属性值顺序存放在list中
     * @param firstCellNum 开始列
     * @param lastCellNum  结束列
     * @return
     * @throws Exception
     */
    private static  T excelTOData(Row row, List list, Integer firstCellNum, Integer lastCellNum,T t) throws Exception {
        Class clazz = t.getClass();
        int i = 0;
        for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) {
            if(i 返回的对象
     * @return
     * @throws Exception
     */
    public static  List excelToDataList(InputStream inputStream,
                                                          String name,
                                                          Class t,
                                                          Map titleMap,
                                                          Map checkMap) throws Exception {
        List lists = new ArrayList<>();
        Workbook wb = null;
        try {
            //根据文件后缀,获取worebook
            wb = getWorkBook(inputStream, name);
            if (wb == null) {
                throw new Exception("创建工作簿失败");
            }
            Sheet sheet = wb.getSheetAt(0);
            //获得当前sheet的开始行
            int firstRowNum = sheet.getFirstRowNum();
            //获得当前sheet的结束行
            int lastRowNum = sheet.getLastRowNum();
            //第一行 title标题行
            Row fristRow = sheet.getRow(firstRowNum);

            //获得第一行的开始列
            int firstCellNum = fristRow.getFirstCellNum();
            //获得第一行的列数
            int lastCellNum = fristRow.getPhysicalNumberOfCells();

            //excel中每列数据在MerchantImportReq属性的顺序
            List keyLists = new ArrayList<>();
            for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) {
                Cell cell = fristRow.getCell(cellNum);
                if (titleMap.size() == 0) {
                    break;
                }
                for (Map.Entry entry : titleMap.entrySet()) {
                    String key = entry.getKey();
                    String cellValue = getCellValue(cell);
                    if (null != cellValue) {
                        if (cellValue.trim().equals(key)) {
                            keyLists.add(titleMap.get(key));
                            titleMap.remove(key);
                            break;
                        }
                    }
                }
            }
            //判断是否缺少信息
            if (lastCellNum < keyLists.size()) {
                throw new Exception("文件信息不全，缺少列");
            }
            //循环除了第一行的所有行  除了title行剩下的都为需要处理的数据
            for (int rowNum = firstRowNum + 1; rowNum <= lastRowNum; rowNum++) {
                //获得当前行
                Row row = sheet.getRow(rowNum);
                if (row == null) {
                    continue;
                }
                T newT = t.newInstance();
                //获取FundCostInfoPageResponse对象并放进list中
                newT = excelTOData(row, keyLists, firstCellNum, lastCellNum, newT);
                boolean rowNumFlag=false;
                for (Field f : newT.getClass().getDeclaredFields()) {
                    f.setAccessible(true);
                    if (f.get(newT) != null && StringUtils.isNotBlank((f.get(newT).toString()))) {
                        rowNumFlag=true;
                        break;
                    }

                }
                if (null != newT&&rowNumFlag) {
                    JSONObject jsonObject = JSONObject.fromObject(newT);
                    if (!checkObjAllFieldsIsNull(jsonObject, checkMap)) {
                        lists.add(newT);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("资金成本汇总数据解析异常 :" + e.getMessage());
        }
        return lists;
    }



    /**
     * 判断对象为空 或者 属性是否全部为空
     *
     * @param
     * @return
     */
    public static boolean checkObjAllFieldsIsNull(JSONObject jsonObject, Map checkMap) throws Exception{
        boolean flag = false;
        if (null == jsonObject) {
            return true;
        }
        for (Map.Entry entry : checkMap.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            String jsonValue=jsonObject.getString(key);
            if (StringUtils.isEmpty(jsonValue)) {
                throw new Exception("必填项【" + value + "】字段不能为空！");
            }
            boolean dateFlag=true;
            if(key.equals("startDate")||key.equals("endDate")){
                dateFlag=DateUtils.isLegalDate(jsonValue.length(),jsonValue,"yyyy-MM-dd");
            }
            if(!dateFlag){
                throw new Exception("【" + value + "】字段格式错误！");
            }

        }
        return flag;
    }



}