wisdomisite-java/src/main/java/com/zhgd/xmgl/util/ReadExcelUtils.java

package com.zhgd.xmgl.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
 * @program: wisdomSite
 * @description:
 * @author: Mr.Peng
 * @create: 2022-06-06 16:11
 **/
@Slf4j
public class ReadExcelUtils {


    public static List<Map<String, String>> jxlExlToList(InputStream is, int index) throws Exception {
        HSSFWorkbook book = null;
        List<Map<String, String>> list = null;
        String companyId = null;
        //Map<String,Object> map=new HashMap<>();
        try {
            book = new HSSFWorkbook(is);// 创建一个新的写入工作簿
            Sheet sheet = book.getSheetAt(0);
            //int totalRows = sheet.getLastRowNum();
            int totalRows = sheet.getPhysicalNumberOfRows();
            //int totalColumns = sheet.getColumns();
            Row xssfRow = sheet.getRow(index);
            int totalColumns = xssfRow.getLastCellNum();
            if (totalColumns <= 0) {
                return null;
            }
            //读取指定行作为Map中的key
            List<String> tableHeaderlist = new ArrayList<>();
            for (int i = 0; i < totalColumns; i++) {
                String value = ExcelUtils.getCellValue(sheet, xssfRow.getCell(i));
                if (tableHeaderlist.contains(value)) {
                    value = value + "(1)";
                }
                if (StringUtils.isNotEmpty(value)) {
                    value = value.replaceAll("[\\t\\n\\r]", "");
                }
                tableHeaderlist.add(value);
            }
            //将指定行后面每一行存为Map集合，然后存为list
            list = new ArrayList<>();
            Map<String, String> rowData = new LinkedHashMap<>();
            int start = 1 + index;
            for (int i = start; i < totalRows; i++) {
                xssfRow = sheet.getRow(i);
                rowData = new LinkedHashMap<>(totalColumns);

                for (int j = 0; j < xssfRow.getLastCellNum(); j++) {
                    if (j < totalColumns) {
                        if (StringUtils.isNotEmpty(tableHeaderlist.get(j).toString())) {
                            if (xssfRow.getCell(j) != null) {
                                String value = ExcelUtils.getCellValue(sheet, xssfRow.getCell(j));
                                rowData.put(tableHeaderlist.get(j).toString(), value);
                            } else {
                                rowData.put(tableHeaderlist.get(j).toString(), "");
                            }
                        }
                    }
                }
                if (rowData.size() > 0) {
                    list.add(rowData);
                }

            }

            log.info("工作簿读取数据成功！");
        } catch (Exception e) {
            log.error("error：", e);
        }
        return list;
    }
}