ChenJiaHe
2020-11-25 db7fc9f145beb76bbef19b1812d63d2ffc2d0df9
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package com.hx.util;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
 
import java.util.List;
import java.util.Map;
 
import com.hx.exception.TipsException;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.Cell;
import org.springframework.web.multipart.MultipartFile;
 
 
/**
 * 
 * @author hjr
 */
public final class ExcelUtil {
 
    /**
     * @param excelName
     *         文件名称
     * @param outPath
     *             保存路径
     * @param headList
     *        Excel文件Head标题集合
     * @param fieldList
     *        Excel文件Field标题集合 根据field来寻找位置填充表格
     * @param dataList
     *        Excel文件数据内容部分
     * @throws Exception
     */
    public static String createExcel(String outPath, String excelName,
            String[] headList, String[] fieldList,
            List<Map<String, Object>> dataList) throws Exception {
 
        String filePath = null;
        // 创建新的Excel 工作簿
        HSSFWorkbook workbook = new HSSFWorkbook();
 
        // 在Excel工作簿中建一工作表,其名为缺省值
        // 如要新建一名为"效益指标"的工作表,其语句为:
        // HSSFSheet sheet = workbook.createSheet("效益指标");
        HSSFSheet sheet = workbook.createSheet();
        // 在索引0的位置创建行(最顶端的行)
        HSSFRow row = sheet.createRow(0);
        // ===============================================================
        for (int i = 0; i < headList.length; i++) {
 
            // 在索引0的位置创建单元格(左上端)
            HSSFCell cell = row.createCell(i);
            // 定义单元格为字符串类型
            cell.setCellType(HSSFCell.CELL_TYPE_STRING);
            // 在单元格中输入一些内容
            cell.setCellValue(headList[i]);
        }
        // ===============================================================
        if (dataList != null) {
            for (int n = 0; n < dataList.size(); n++) {
                // 在索引1的位置创建行
                HSSFRow row_value = sheet.createRow(n + 1);
                Map<String, Object> dataMap = dataList.get(n);
                // ===============================================================
                for (int i = 0; i < fieldList.length; i++) {
                    // 在索引0的位置创建单元格(左上端)
                    HSSFCell cell = row_value.createCell(i);
                    // 定义单元格为字符串类型
                    cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                    // 在单元格中输入一些内容
                    cell.setCellValue(objToString(dataMap.get(fieldList[i])));
                }
                // ===============================================================
            }
        }
 
        // 新建一输出文件流
        File file = SimpleTool.createFile(outPath,excelName);
        FileOutputStream fOut = new FileOutputStream(file);
        // 把相应的Excel 工作簿存盘
        workbook.write(fOut);
        fOut.flush();
        // 操作结束,关闭文件
        fOut.close();
 
        if(outPath.endsWith("/")){
            filePath = outPath + excelName;
        }else{
            filePath = outPath +"/"+ excelName;
        }
        return filePath;
    }
 
    /**生成临时文件
     * @param headList
     *        Excel文件Head标题集合
     * @param fieldList
     *        Excel文件Field标题集合 根据field来寻找位置填充表格
     * @param dataList
     *        Excel文件数据内容部分
     * @throws Exception
     */
    public static File createExcel(String[] headList, String[] fieldList,
                                     List<Map<String, Object>> dataList) throws Exception {
        File file = File.createTempFile("temp", ".xls");
        try{
            // 创建新的Excel 工作簿
            HSSFWorkbook workbook = new HSSFWorkbook();
 
            // 在Excel工作簿中建一工作表,其名为缺省值
            // 如要新建一名为"效益指标"的工作表,其语句为:
            // HSSFSheet sheet = workbook.createSheet("效益指标");
            HSSFSheet sheet = workbook.createSheet();
            // 在索引0的位置创建行(最顶端的行)
            HSSFRow row = sheet.createRow(0);
            // ===============================================================
            for (int i = 0; i < headList.length; i++) {
 
                // 在索引0的位置创建单元格(左上端)
                HSSFCell cell = row.createCell(i);
                // 定义单元格为字符串类型
                cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                // 在单元格中输入一些内容
                cell.setCellValue(headList[i]);
            }
            // ===============================================================
            if (dataList != null) {
                for (int n = 0; n < dataList.size(); n++) {
                    // 在索引1的位置创建行
                    HSSFRow row_value = sheet.createRow(n + 1);
                    Map<String, Object> dataMap = dataList.get(n);
                    // ===============================================================
                    for (int i = 0; i < fieldList.length; i++) {
                        // 在索引0的位置创建单元格(左上端)
                        HSSFCell cell = row_value.createCell(i);
                        // 定义单元格为字符串类型
                        cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                        // 在单元格中输入一些内容
                        cell.setCellValue(objToString(dataMap.get(fieldList[i])));
                    }
                    // ===============================================================
                }
            }
 
            // 新建一输出文件流
            FileOutputStream fOut = new FileOutputStream(file);
            // 把相应的Excel 工作簿存盘
            workbook.write(fOut);
            fOut.flush();
            // 操作结束,关闭文件
            fOut.close();
        }catch (Exception e){
 
        }finally {
            file.deleteOnExit();
        }
        return file;
    }
 
 
    private static String objToString(Object obj) {
        if (obj == null) {
            return "";
        } else {
            if (obj instanceof String) {
                return (String) obj;
            } else if (obj instanceof Date) {
                return null;// DateUtil.dateToString((Date)
                            // obj,DateUtil.DATESTYLE_SHORT_EX);
            } else {
                return obj.toString();
            }
        }
    }
 
    /**
     * 读取 Excel文件内容
     *
     * @param file
     * @param header 是否包括表头
     * @return
     * @throws Exception
     */
    public static List<List<String>> readExcelByeFileData(MultipartFile file, boolean header) throws Exception {
 
        String fileName = file.getOriginalFilename();
        if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
            throw new TipsException("上传文件格式不正确");
        }
 
        // 结果集
        List<List<String>> list = new ArrayList<>();
 
        HSSFWorkbook hssfworkbook = new HSSFWorkbook(file.getInputStream());
 
        // 遍历该表格中所有的工作表,i表示工作表的数量 getNumberOfSheets表示工作表的总数
        for(int s=0;s<hssfworkbook.getNumberOfSheets();s++) {
            HSSFSheet hssfsheet = hssfworkbook.getSheetAt(s);
            int col = 0;
            // 遍历该行所有的行,j表示行数 getPhysicalNumberOfRows行的总数 去除标题
            for (int j = 0; j < hssfsheet.getPhysicalNumberOfRows(); j++) {
                HSSFRow hssfrow = hssfsheet.getRow(j);
                if(hssfrow!=null){
                    if(j == 0) {
                        col = hssfrow.getPhysicalNumberOfCells();
                        if(!header) {
                            //不包括表头
                            continue;
                        }
                    }
                    // 单行数据
                    List<String> arrayString = new ArrayList<>();
                    for (int i = 0; i < col; i++) {
                        HSSFCell cell = hssfrow.getCell(i);
                        if (cell == null) {
                            arrayString.add("");
                        } else if (cell.getCellType() == 0) {
                            // arrayString[i] = new Double(cell.getNumericCellValue()).toString();
                            if (HSSFCell.CELL_TYPE_NUMERIC == cell.getCellType()) {
                                short format = cell.getCellStyle().getDataFormat();
                                if(format == 14 || format == 31 || format == 57 || format == 58){
                                    //日期(中文时间格式的)
                                    Date d = cell.getDateCellValue();
                                    DateFormat formater = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
                                    // DateFormat formater = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                                    arrayString.add(formater.format(d));
                                    //arrayString[i] = formater.format(d);
                                }else if (HSSFDateUtil.isCellDateFormatted(cell)) {
                                    Date d = cell.getDateCellValue();
                                    //DateFormat formater = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");
                                    DateFormat formater = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
                                    arrayString.add(formater.format(d));
                                    //arrayString[i] = formater.format(d);
                                } else {
                                    if(HSSFCell.CELL_TYPE_STRING == cell.getCellType()){
                                        arrayString.add(cell.getStringCellValue());
                                        //arrayString[i] =cell.getStringCellValue();
                                    }else if(HSSFCell.CELL_TYPE_FORMULA==cell.getCellType()){
                                        arrayString.add(cell.getCellFormula());
                                        //arrayString[i] =cell.getCellFormula();
                                    }else if(HSSFCell.CELL_TYPE_NUMERIC== cell.getCellType()){
                                        HSSFDataFormatter dataFormatter = new HSSFDataFormatter();
                                        arrayString.add(dataFormatter.formatCellValue(cell));
                                        //arrayString[i] =dataFormatter.formatCellValue(cell);
                                    }
                                }
                            }
                        } else if(cell.getCellType() == Cell.CELL_TYPE_BLANK){
                            arrayString.add("");
                            //arrayString[i] = "";
                        } else { // 如果EXCEL表格中的数据类型为字符串型
                            arrayString.add(cell.getStringCellValue().trim());
                            //arrayString[i] = cell.getStringCellValue().trim();
                        }
                    }
                    list.add(arrayString);
                }
            }
        }
        return list;
    }
 
}