首先匯入jar包：

commons-collections 4-4.1jar 

poi 3.9.jar   --核心jar包；

poi-ooxml.3.9.jar    --支援xlsx讀取

poi-ooxml-schemas 3.9.jar  

xmlbeans-2.6.0.jar

maven配置：

讀取excel工具類：

package com.feosa.common.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

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.Header;
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.xssf.usermodel.XSSFWorkbook;

public class ExcelPoiReaderUtils {

	/**
	 * 讀取excel 第1張sheet （xls和xlsx）
	 * 
	 * @param filePath	excel路徑
	 * @param columns	列名（表頭）
	 * @author lizixiang ,2018-05-08
	 * @return
	 */
	public List<Map<String, String>> readExcel(String filePath,String columns[]) {
		Sheet sheet = null;
		Row row = null;
		Row rowHeader = null;
		List<Map<String, String>> list = null;
		String cellData = null;
		Workbook wb = null;
		if (filePath == null) {
			return null;
		}
		String extString = filePath.substring(filePath.lastIndexOf("."));
		InputStream is = null;
		try {
			is = new FileInputStream(filePath);
			if (".xls".equals(extString)) {
				wb = new HSSFWorkbook(is);
			} else if (".xlsx".equals(extString)) {
				wb = new XSSFWorkbook(is);
			} else {
				wb = null;
			}
			if (wb != null) {
				// 用來存放表中資料
				list = new ArrayList<Map<String, String>>();
				// 獲取第一個sheet
				sheet = wb.getSheetAt(0);
				// 獲取最大行數
				int rownum = sheet.getPhysicalNumberOfRows();
				// 獲取第一行
				rowHeader = sheet.getRow(0);
				row = sheet.getRow(0);
				// 獲取最大列數
				int colnum = row.getPhysicalNumberOfCells();
				for (int i = 1; i < rownum; i++) {
					Map<String, String> map = new LinkedHashMap<String, String>();
					row = sheet.getRow(i);
					if (row != null) {
						for (int j = 0; j < colnum; j++) {
							if(columns[j].equals(getCellFormatValue(rowHeader.getCell(j)))){
								cellData = (String) getCellFormatValue(row
										.getCell(j));
								map.put(columns[j], cellData);
							}
						}
					} else {
						break;
					}
					list.add(map);
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return list;
	}

	/**	獲取單個單元格資料
	 * @param cell
	 * @return
	 * @author lizixiang ,2018-05-08
	 */
	public Object getCellFormatValue(Cell cell) {
		Object cellValue = null;
		if (cell != null) {
			// 判斷cell型別
			switch (cell.getCellType()) {
			case Cell.CELL_TYPE_NUMERIC: {
				cellValue = String.valueOf(cell.getNumericCellValue());
				break;
			}
			case Cell.CELL_TYPE_FORMULA: {
				// 判斷cell是否為日期格式
				if (DateUtil.isCellDateFormatted(cell)) {
					// 轉換為日期格式YYYY-mm-dd
					cellValue = cell.getDateCellValue();
				} else {
					// 數字
					cellValue = String.valueOf(cell.getNumericCellValue());
				}
				break;
			}
			case Cell.CELL_TYPE_STRING: {
				cellValue = cell.getRichStringCellValue().getString();
				break;
			}
			default:
				cellValue = "";
			}
		} else {
			cellValue = "";
		}
		return cellValue;
	}

}
 

測試類：

public static void main(String[] args) {
        String filePath = "D:/tools/託管檔案.xls";
        String columns[] = {"賬戶名稱","開戶時間","證券帳號","開戶機構"};
        List<Map<String, String>> list = new ExcelPoiReaderUtils().readExcel(filePath, columns);
        //遍歷解析出來的list
        for (Map<String,String> map : list) {
            for (Entry<String,String> entry : map.entrySet()) {
                System.out.print(entry.getKey()+":"+entry.getValue()+",");
            }
            System.out.println();
        }
    }
 

excel檔案：