原!操作 excel 03/07

参考 所用jar包：

　　poi-3.11.jar
　　poi-ooxml-3.11.jar
　　poi-ooxml-schemas-3.11.jar

/*
 * Project: fusion-may-open-fusion-base
 *
 * File Created at 2018年4月28日
 *
 * Copyright 2016 CMCC Corporation Limited.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * ZYHY Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license.
 */
package com.cmcc.open.ss.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
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;

import com.cmcc.open.framework.utils.TimeUtil;

/**
 * @Type ExcelHelper.java
 * @Desc 支持excel 03/07版本
 * @author xxx
 * @date 2018年4月28日 上午11:20:49
 * @version
 */
public class ExcelHelper {

    /**
     * 读取excel文件内容(适合 第一行为大标题，第二行是列名行)
     * @param f
     * @return
     */
    public static List<List<Map<String, String>>> readExcelContent(File f, String fileName) {

        String fileType = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());
        InputStream is = null;
        Workbook wb = null;
        List<List<Map<String, String>>> result = new ArrayList<List<Map<String, String>>>();//对应excel文件
        try {
            is = new FileInputStream(f.getAbsoluteFile());
            if (fileType.equals("xls")) {
                wb = new HSSFWorkbook(is);
            } else if (fileType.equals("xlsx")) {
                wb = new XSSFWorkbook(f.getAbsoluteFile());
            }

            int sheetSize = wb.getNumberOfSheets();
            for (int i = 0; i < sheetSize; i++) {//遍历sheet页
                Sheet sheet = wb.getSheetAt(i);
                List<Map<String, String>> sheetList = new ArrayList<Map<String, String>>();//对应sheet页
                List<String> titles = new ArrayList<String>();//放置所有的标题  

                int rowSize = sheet.getLastRowNum() + 1;
                for (int j = 0; j < rowSize; j++) {//遍历行
                    Row row = sheet.getRow(j);
                    if (row == null) {//略过空行
                        continue;
                    }
                    if (j == 0) {
                        continue;//第一行 大标题
                    }
                    int cellSize = row.getLastCellNum();//行中有多少个单元格，也就是有多少列
                    if (j == 1) {//第二行  标题行  (列名行)
                        for (int k = 0; k < cellSize; k++) {
                            Cell cell = row.getCell(k);
                            titles.add(cell.toString());
                        }
                    } else {//其他行是数据行
                        Map<String, String> rowMap = new HashMap<String, String>();//对应一个数据行
                        for (int k = 0; k < titles.size(); k++) {
                            Cell cell = row.getCell(k);
                            String key = titles.get(k).trim();
                            String value = null;
                            if (cell != null) {
                                int cellType = cell.getCellType();
                                switch (cellType) {
                                    case Cell.CELL_TYPE_STRING: // 文本
                                        value = cell.getRichStringCellValue().getString().trim();
                                        break;
                                    case Cell.CELL_TYPE_NUMERIC: // 数字、日期
                                        if (DateUtil.isCellDateFormatted(cell)) {
                                            value = TimeUtil.getFormatDateTime(
                                                    cell.getDateCellValue(),
                                                    TimeUtil.TIME_FORMAT2_24);
                                        } else {
                                            cell.setCellType(Cell.CELL_TYPE_STRING);
                                            value = String.valueOf(cell.getRichStringCellValue()
                                                    .getString().trim());
                                        }
                                        break;
                                    case Cell.CELL_TYPE_BOOLEAN: // 布尔型
                                        value = String.valueOf(cell.getBooleanCellValue());
                                        break;
                                    case Cell.CELL_TYPE_BLANK: // 空白
                                        value = "";
                                        //                                        value = cell.getStringCellValue();
                                        break;
                                    case Cell.CELL_TYPE_ERROR: // 错误
                                        value = "错误#";
                                        break;
                                    case Cell.CELL_TYPE_FORMULA: // 公式
                                        // 得到对应单元格的公式
                                        //cellValue = cell.getCellFormula() + "#";
                                        // 得到对应单元格的字符串
                                        cell.setCellType(Cell.CELL_TYPE_STRING);
                                        value = String
                                                .valueOf(cell.getRichStringCellValue().getString());
                                        break;
                                    default:
                                        value = "#";
                                }
                                //                                value = cell.toString().trim();
                            }
                            rowMap.put(key, value);
                        }
                        sheetList.add(rowMap);
                    }
                }
                result.add(sheetList);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (wb != null) {
                    wb.close();
                }
                if (is != null) {
                    is.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }

        return result;
    }

    /**
     *
     * @param title 第一行 例如：码号模板xxx
     * @param header 标题行
     * @param list 数据集合
     */
    public static HSSFWorkbook writeExcel(String title, String[] header, List<String[]> dataList) {

        HSSFWorkbook workbook = new HSSFWorkbook(); // 创建工作簿对象
        try {
            HSSFSheet sheet = workbook.createSheet("Sheet1"); // 创建工作表
            // 产生表格标题行
            HSSFRow rowm = sheet.createRow(0);
            HSSFCell bigTitle = rowm.createCell(0);

            //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面  - 可扩展】
            HSSFCellStyle columnTopStyle = getColumnTopStyle(workbook);//获取列头样式对象
            HSSFCellStyle style = getStyle(workbook); //单元格样式对象

            sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, (header.length - 1)));
            bigTitle.setCellStyle(columnTopStyle);
            bigTitle.setCellValue(title);

            // 定义所需列数
            int columnNum = header.length;
            HSSFRow rowRowName = sheet.createRow(1); // 在索引1的位置创建行(最顶端的行开始的第二行)

            // 将列头设置到sheet的单元格中
            for (int n = 0; n < columnNum; n++) {
                HSSFCell cellRowName = rowRowName.createCell(n); //创建列头对应个数的单元格
                cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //设置列头单元格的数据类型
                HSSFRichTextString text = new HSSFRichTextString(header[n]);
                cellRowName.setCellValue(text); //设置列头单元格的值
                //                cellRowName.setCellStyle(columnTopStyle); //设置列头单元格样式
                cellRowName.setCellStyle(style); //设置列头单元格样式
                sheet.setColumnWidth(n, 18 * 256); //设置列宽
            }

            //将查询出的数据设置到sheet对应的单元格中
            for (int i = 0; i < dataList.size(); i++) {

                String[] strArr = dataList.get(i);//遍历每个对象
                HSSFRow row = sheet.createRow(i + 2);//创建所需的行数
                HSSFCell numCell = row.createCell(0, HSSFCell.CELL_TYPE_NUMERIC);//序号列
                numCell.setCellValue(i + 1);
                numCell.setCellStyle(style); //设置单元格样式

                for (int j = 0; j < strArr.length; j++) {
                    HSSFCell cell = null; //设置单元格的数据类型
                    cell = row.createCell(j + 1, HSSFCell.CELL_TYPE_STRING);
                    if (strArr[j] != null) {
                        cell.setCellValue(strArr[j].toString()); //设置单元格的值
                    }else{
                        cell.setCellValue(""); //设置单元格的值
                    }
                    cell.setCellStyle(style); //设置单元格样式
                }
            }
            //让列宽随着导出的列长自动适应
            /*for (int colNum = 0; colNum < columnNum; colNum++) {
                int columnWidth = sheet.getColumnWidth(colNum) / 256;
                for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
                    HSSFRow currentRow;
                    //当前行未被使用过
                    if (sheet.getRow(rowNum) == null) {
                        currentRow = sheet.createRow(rowNum);
                    } else {
                        currentRow = sheet.getRow(rowNum);
                    }
                    if (currentRow.getCell(colNum) != null) {
                        HSSFCell currentCell = currentRow.getCell(colNum);
                        if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
                            int length = currentCell.getStringCellValue().getBytes().length;
                            if (columnWidth < length) {
                                columnWidth = length;
                            }
                        }
                    }
                }
                if (colNum == 0) {
                    sheet.setColumnWidth(colNum, (columnWidth - 2) * 256);
                } else {
                    sheet.setColumnWidth(colNum, (columnWidth + 4) * 256);
                }
            }*/

        } catch (Exception e) {
            e.printStackTrace();
        }

        return workbook;
    }

    /*
     * 列头单元格样式
     */
    public static HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        font.setFontHeightInPoints((short) 11);
        //字体加粗
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.BLACK.index);
        //设置左边框;
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.BLACK.index);
        //设置右边框;
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.BLACK.index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

        return style;

    }

    /*
    * 列数据信息单元格样式
    */
    public static HSSFCellStyle getStyle(HSSFWorkbook workbook) {
        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        //font.setFontHeightInPoints((short)10);
        //字体加粗
        //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.BLACK.index);
        //设置左边框;
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.BLACK.index);
        //设置右边框;
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.BLACK.index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

        return style;

    }

    /**
     * 输出excel文件流
     * @param response
     * @param fileName
     * @param workbook
     */
    public static void exportExcel(HttpServletResponse response, String fileName,
                                   HSSFWorkbook workbook) {
        OutputStream out = null;
        try {
            response.setContentType("application/octet-stream");
            response.setHeader("Content-disposition ",
                    "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8"));
            out = response.getOutputStream();
            workbook.write(out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (workbook != null) {
                    workbook.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }

    }

}