java 解析上传的Excel文件

java poi解析上传的Excel文件

 

 

package com.zhl.push.Utils;

/**
 * @Author TAO
 * @ClassName ExcelData
 * @Description TODO
 * @Date 2019/1/9 15:02
 * @Version 1.0
 */

import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

/**
 * 解析excel 上传数据
 */
public class AnalysisExcelData {


    /**
     * @Author
     * @Description //TODO
     * @Date 2019/8/15 12:14
     * @Param file ：上传的excel文件
     * @return  * @param null
     */
    public static List getExcelData(MultipartFile file) throws IOException {
        checkFile(file);
        //获得Workbook工作薄对象
        Workbook workbook = getWorkBook(file);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List list = new ArrayList<>();
        if (workbook != null) {
            for (int sheetNum = 0; sheetNum < workbook.getNumberOfSheets(); sheetNum++) {
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if (sheet == null) {
                    continue;
                }
                //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();
                //循环除了所有行,如果要循环除第一行以外的就firstRowNum+1
                for (int rowNum = firstRowNum + 1; rowNum <= lastRowNum; rowNum++) {
                    //获得当前行
                    Row row = sheet.getRow(rowNum);
                    if (row == null) {
                        continue;
                    }
                    //获得当前行的开始列
                    int firstCellNum = row.getFirstCellNum();
                    //获得当前行的列数
                    int lastCellNum = row.getLastCellNum();
                    if (lastCellNum > 0) {
                        ArrayList