Java-Excel导入(参数：kay=文件地址,value=filepath)

ExcelUtil

import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.xmlbeans.impl.piccolo.io.FileFormatException;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.lang.reflect.Field;
import java.util.*;

@Slf4j
public class ExcelUtil {
        public static final String EXTENSION_XLS = "xls";
        public static final String EXTENSION_XLSX = "xlsx";

    /**
     * <pre>
     * 取得Workbook对象(xls和xlsx对象不同,不过都是Workbook的实现类) xls:HSSFWorkbook
     * xlsx：XSSFWorkbook
     * @param filePath
     * @return
     * @throws IOException </pre>
     */
    private static Workbook getWorkbook(String filePath) throws IOException {
        Workbook workbook = null;
        // 检查
        preReadCheck(filePath);
        InputStream is = new FileInputStream(filePath);
        // 获取workbook对象
        if (filePath.endsWith(EXTENSION_XLS)) {
            workbook = new HSSFWorkbook(is);
        } else if (filePath.endsWith(EXTENSION_XLSX)) {
            workbook = new XSSFWorkbook(is);
        }
        is.close();
        return workbook;
    }

    /**
     * 文件检查
     *
     * @param filePath
     * @throws FileNotFoundException
     * @throws FileFormatException
     */
    private static void preReadCheck(String filePath) throws FileNotFoundException, FileFormatException {
        // 常规检查
        File file = new File(filePath);
        if (!file.exists()) {
            throw new FileNotFoundException("传入的文件不存在：" + filePath);
        }
        if (!(filePath.endsWith(EXTENSION_XLS) || filePath.endsWith(EXTENSION_XLSX))) {
            throw new FileFormatException("传入的文件不是excel");
        }
    }

    /**
     * 读取excel文件内容
     *
     * @param filePath
     * @throws FileNotFoundException
     * @throws FileFormatException
     */
    public static List<Map<String, String>> readAllExcel(String filePath) throws FileNotFoundException, FileFormatException {
        List<Map<String, String>> res = new ArrayList<>();
        Workbook workbook = null;
        try {
            workbook = getWorkbook(filePath);
            // 读文件 一个sheet一个sheet地读取
            for (int numSheet = 0; numSheet < workbook.getNumberOfSheets(); numSheet++) {
                Sheet sheet = workbook.getSheetAt(numSheet);
                if (sheet == null) {
                    continue;
                }
                log.info("=======================" + sheet.getSheetName() + "=========================");
                int firstRowIndex = sheet.getFirstRowNum();
                int lastRowIndex = sheet.getLastRowNum();

                // 读取首行 即,表头
                Row firstRow = sheet.getRow(firstRowIndex);
                if (firstRow != null) {

                    for (int i = firstRow.getFirstCellNum(); i <= firstRow.getLastCellNum(); i++) {
                        Cell cell = firstRow.getCell(i);
                        String cellValue = getCellValue(cell, true);
                    }
                    // 读取数据行
                    for (int rowIndex = firstRowIndex + 1; rowIndex <= lastRowIndex; rowIndex++) {
                        Map<String, String> map = new HashMap<>();
                        Row currentRow = sheet.getRow(rowIndex);// 当前行
                        int firstColumnIndex = currentRow.getFirstCellNum(); // 首列
                        int lastColumnIndex = currentRow.getLastCellNum();// 最后一列

                        String s = "";
                        for (int columnIndex = firstColumnIndex; columnIndex <= lastColumnIndex; columnIndex++) {
                            Cell currentCell = currentRow.getCell(columnIndex);// 当前单元格
                            String currentCellValue = getCellValue(currentCell, true);// 当前单元格的值
                            map.put("cell" + columnIndex, currentCellValue);
                            s += currentCellValue + "\t";
                        }
                        log.info(s);
                        res.add(map);
                    }
                    log.info("======================================================");
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (workbook != null) {
                try {
                    workbook.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return res;
    }

    /**
     * 测试入口
     */

public static void main(String[] args) throws FileFormatException, FileNotFoundException { } }