我编写的这个解析工具类有做单元格为空补全的功能，指定解析几个sheet页（有些Excel有隐藏的sheet页是不需要解析的）

调用代码：
XxsAnalysisImportExcel xxs = new XxsAnalysisImportExcel();
List<List<Map<String, Object>>> sheetData = new ArrayList<List<Map<String,Object>>>();
xxs.process(inputStream, sheetData,3);
//获取到解析的每个sheet页数据
List<Map<String, Object>> sheet0 = sheetData.get(0);
ObjectMapper map = new ObjectMapper();
//转换成业务VO
List baseInfo = map.convertValue(sheet0, new TypeReference<List>() {});

工具类：XxsAnalysisImportExcel.java
package com.qizhidao.ecloud.common.utils;

import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;

import java.io.InputStream;
import java.util.*;

/**

• 导入Excel解析

• @author tanle

• @since 2019年3月1日
  */
  public class XxsAnalysisImportExcel extends DefaultHandler{

  private Integer sheetIndex = 0;

  private Integer curRow = 0;

  private Integer curCol = 0;

  //当前位置
  private Integer preRef = 0;

  private boolean nextIsString = false;

  private String lastContents