package cn.com.goldenwater.dcproj.utils;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFCell;
import org.apache.poi.xssf.streaming.SXSSFRow;
import org.apache.poi.xssf.streaming.SXSSFSheet;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;

/**
 * @ClassName ExcelUtils
 * @Description 导出Excel的工具类
 * @Author liyz
 * @Date 2019/3/6 9:43
 * @Version 1.0
 **/
public class ExcelUtils {

    /**
     * 未定义的字段
     */
    public static final String NO_DEFINE = "no_define";

    /**
     * 默认日期格式
     */
    public static final String DEFAULT_DATE_PATTERN = "yyyy年MM月dd日";

    /**
     * 默认列宽
     */
    public static final int DEFAULT_COLOUMN_WIDTH = 17;

    /**
     * 导出Excel 97(.xls)格式 ，少量数据
     *
     * @param title       标题行
     * @param headMap     属性-列名
     * @param jsonArray   数据集
     * @param datePattern 日期格式，null则用默认日期格式
     * @param colWidth    列宽 默认 至少17个字节
     * @param out         输出流
     */
    public static void exportExcel(String title, Map<String, String> headMap, JSONArray jsonArray, String datePattern, int colWidth, OutputStream out) {
        if (datePattern == null) {
            datePattern = DEFAULT_DATE_PATTERN;
        }
        ;
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        workbook.createInformationProperties();
        workbook.getDocumentSummaryInformation().setCompany("*****公司");
        SummaryInformation si = workbook.getSummaryInformation();
        //填加xls文件作者信息
        si.setAuthor("JACK");
        //填加xls文件创建程序信息
        si.setApplicationName("导出程序");
        //填加xls文件最后保存者信息
        si.setLastAuthor("最后保存者信息");
        //填加xls文件作者信息
        si.setComments("JACK is a programmer!");
        //填加xls文件标题信息
        si.setTitle("POI导出Excel");
        //填加文件主题信息
        si.setSubject("POI导出Excel");
        si.setCreateDateTime(new Date());
        //表头样式
        HSSFCellStyle titleStyle = workbook.createCellStyle();
        titleStyle.setAlignment(HorizontalAlignment.CENTER);
        HSSFFont titleFont = workbook.createFont();
        titleFont.setFontHeightInPoints((short) 20);
        // titleFont.setBoldweight((short) 700);
        titleFont.setBold(true);
        titleStyle.setFont(titleFont);
        // 列头样式
        HSSFCellStyle headerStyle = workbook.createCellStyle();
        headerStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        headerStyle.setBorderBottom(BorderStyle.THIN);
        headerStyle.setBorderLeft(BorderStyle.THIN);
        headerStyle.setBorderRight(BorderStyle.THIN);
        headerStyle.setBorderTop(BorderStyle.THIN);
        headerStyle.setAlignment(HorizontalAlignment.CENTER);
        HSSFFont headerFont = workbook.createFont();
        headerFont.setFontHeightInPoints((short) 12);
        // headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        headerFont.setBold(true);
        headerStyle.setFont(headerFont);
        // 单元格样式
        HSSFCellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        cellStyle.setBorderBottom(BorderStyle.THIN);
        cellStyle.setBorderLeft(BorderStyle.THIN);
        cellStyle.setBorderRight(BorderStyle.THIN);
        cellStyle.setBorderTop(BorderStyle.THIN);
        cellStyle.setAlignment(HorizontalAlignment.CENTER);
        cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        HSSFFont cellFont = workbook.createFont();
        // cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        cellFont.setBold(true);
        cellStyle.setFont(cellFont);
        // 生成一个(带标题)表格
        HSSFSheet sheet = workbook.createSheet();
        // 声明一个画图的顶级管理器
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定义注释的大小和位置,详见文档
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
                0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 设置注释内容
        comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
        // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
        comment.setAuthor("JACK");
        //设置列宽
        //至少字节数
        int minBytes = colWidth < DEFAULT_COLOUMN_WIDTH ? DEFAULT_COLOUMN_WIDTH : colWidth;
        int[] arrColWidth = new int[headMap.size()];
        // 产生表格标题行,以及设置列宽
        String[] properties = new String[headMap.size()];
        String[] headers = new String[headMap.size()];
        int ii = 0;
        for (Iterator<String> iter = headMap.keySet().iterator(); iter
                .hasNext(); ) {
            String fieldName = iter.next();

            properties[ii] = fieldName;
            headers[ii] = fieldName;

            int bytes = fieldName.getBytes().length;
            arrColWidth[ii] = bytes < minBytes ? minBytes : bytes;
            sheet.setColumnWidth(ii, arrColWidth[ii] * 256);
            ii++;
        }
        // 遍历集合数据，产生数据行
        int rowIndex = 0;
        for (Object obj : jsonArray) {
            if (rowIndex == 65535 || rowIndex == 0) {
                //如果数据超过了，则在第二页显示
                if (rowIndex != 0) {
                    sheet = workbook.createSheet();
                }
                //表头 rowIndex=0
                HSSFRow titleRow = sheet.createRow(0);
                titleRow.createCell(0).setCellValue(title);
                titleRow.getCell(0).setCellStyle(titleStyle);
                sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1));
                //列头 rowIndex =1
                HSSFRow headerRow = sheet.createRow(1);
                for (int i = 0; i < headers.length; i++) {
                    headerRow.createCell(i).setCellValue(headers[i]);
                    headerRow.getCell(i).setCellStyle(headerStyle);
                }
                //数据内容从 rowIndex=2开始
                rowIndex = 2;
            }
            JSONObject jo = (JSONObject) JSONObject.toJSON(obj);
            HSSFRow dataRow = sheet.createRow(rowIndex);
            for (int i = 0; i < properties.length; i++) {
                HSSFCell newCell = dataRow.createCell(i);

                Object o = jo.get(properties[i]);
                String cellValue = "";
                if (o == null) {
                    cellValue = "";
                } else if (o instanceof Date) {
                    cellValue = new SimpleDateFormat(datePattern).format(o);
                } else {
                    cellValue = o.toString();
                }

                newCell.setCellValue(cellValue);
                newCell.setCellStyle(cellStyle);
            }
            rowIndex++;
        }
        try {
            workbook.write(out);
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 导出Excel 2007 OOXML (.xlsx)格式
     *
     * @param title       标题行
     * @param headMap     属性-列头
     * @param jsonArray   数据集
     * @param datePattern 日期格式，传null值则默认 年月日
     * @param colWidth    列宽 默认 至少17个字节
     * @param out         输出流
     */
    public static void exportExcelX(String title, Map<String, String> headMap, JSONArray jsonArray, String datePattern, int colWidth, OutputStream out) {
        if (datePattern == null) {
            datePattern = DEFAULT_DATE_PATTERN;
        }
        // 声明一个工作薄
        //缓存
        SXSSFWorkbook workbook = new SXSSFWorkbook(1000);
        workbook.setCompressTempFiles(true);
        //表头样式
        CellStyle titleStyle = workbook.createCellStyle();
        titleStyle.setAlignment(HorizontalAlignment.CENTER);
        Font titleFont = workbook.createFont();
        titleFont.setFontHeightInPoints((short) 20);
        // titleFont.setBoldweight((short) 700);
        titleFont.setBold(true);
        titleStyle.setFont(titleFont);
        // 列头样式
        CellStyle headerStyle = workbook.createCellStyle();
        headerStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        headerStyle.setBorderBottom(BorderStyle.THIN);
        headerStyle.setBorderLeft(BorderStyle.THIN);
        headerStyle.setBorderRight(BorderStyle.THIN);
        headerStyle.setBorderTop(BorderStyle.THIN);
        headerStyle.setAlignment(HorizontalAlignment.CENTER);
        headerStyle.setFillForegroundColor(IndexedColors.SKY_BLUE.index);
        Font headerFont = workbook.createFont();
        headerFont.setFontHeightInPoints((short) 12);
        // headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        headerFont.setBold(true);
        headerStyle.setFont(headerFont);
        // 单元格样式
        CellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        cellStyle.setBorderBottom(BorderStyle.THIN);
        cellStyle.setBorderLeft(BorderStyle.THIN);
        cellStyle.setBorderRight(BorderStyle.THIN);
        cellStyle.setBorderTop(BorderStyle.THIN);
        cellStyle.setAlignment(HorizontalAlignment.CENTER);
        cellStyle.setFillForegroundColor(IndexedColors.SKY_BLUE.index);
        cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        Font cellFont = workbook.createFont();
        // cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        cellFont.setBold(true);
        cellStyle.setFont(cellFont);
        // 生成一个(带标题)表格
        SXSSFSheet sheet = workbook.createSheet();
        //设置列宽
        //至少字节数
        int minBytes = colWidth < DEFAULT_COLOUMN_WIDTH ? DEFAULT_COLOUMN_WIDTH : colWidth;
        int[] arrColWidth = new int[headMap.size()];
        // 产生表格标题行,以及设置列宽
        String[] properties = new String[headMap.size()];
        String[] headers = new String[headMap.size()];
        int ii = 0;
        for (Iterator<String> iter = headMap.keySet().iterator(); iter
                .hasNext(); ) {
            String fieldName = iter.next();

            properties[ii] = fieldName;
            headers[ii] = headMap.get(fieldName);

            int bytes = fieldName.getBytes().length;
            arrColWidth[ii] = bytes < minBytes ? minBytes : bytes;
            sheet.setColumnWidth(ii, arrColWidth[ii] * 256);
            ii++;
        }
        // 遍历集合数据，产生数据行
        int rowIndex = 0;
        for (Object obj : jsonArray) {
            if (rowIndex == 65535 || rowIndex == 0) {
                if (rowIndex != 0) {
                    //如果数据超过了，则在第二页显示
                    sheet = workbook.createSheet();
                }
                //表头 rowIndex=0
                SXSSFRow titleRow = sheet.createRow(0);
                titleRow.createCell(0).setCellValue(title);
                titleRow.getCell(0).setCellStyle(titleStyle);
                sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1));
                //列头 rowIndex =1
                SXSSFRow headerRow = sheet.createRow(1);
                for (int i = 0; i < headers.length; i++) {
                    headerRow.createCell(i).setCellValue(headers[i]);
                    headerRow.getCell(i).setCellStyle(headerStyle);

                }
                //数据内容从 rowIndex=2开始
                rowIndex = 2;
            }
            JSONObject jo = (JSONObject) JSONObject.toJSON(obj);
            SXSSFRow dataRow = sheet.createRow(rowIndex);
            for (int i = 0; i < properties.length; i++) {
                SXSSFCell newCell = dataRow.createCell(i);

                Object o = jo.get(properties[i]);
                String cellValue = "";
                if (o == null) {
                    cellValue = "";
                } else if (o instanceof Date) {
                    cellValue = new SimpleDateFormat(datePattern).format(o);
                } else if (o instanceof Float || o instanceof Double) {
                    cellValue = new BigDecimal(o.toString()).setScale(2, BigDecimal.ROUND_HALF_UP).toString();
                } else {
                    cellValue = o.toString();
                }

                newCell.setCellValue(cellValue);
                newCell.setCellStyle(cellStyle);
            }
            rowIndex++;
        }
        try {
            workbook.write(out);
            workbook.close();
            workbook.dispose();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Web 导出excel
     */
    public static void downloadExcelFile(String title, Map<String, String> headMap, JSONArray ja, HttpServletResponse response) {
        try {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            ExcelUtils.exportExcelX(title, headMap, ja, null, 0, os);
            byte[] content = os.toByteArray();
            InputStream is = new ByteArrayInputStream(content);
            // 设置response参数，可以打开下载页面
            response.reset();

            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + new String((title + ".xlsx").getBytes(), "iso-8859-1"));
            response.setContentLength(content.length);
            ServletOutputStream outputStream = response.getOutputStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            BufferedOutputStream bos = new BufferedOutputStream(outputStream);
            byte[] buff = new byte[8192];
            int bytesRead;
            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);

            }
            bis.close();
            bos.close();
            outputStream.flush();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 下载Excel重载方法
     */
    public static void downloadExcelFile(HttpServletResponse response, ByteArrayOutputStream os, String fileName) {
        try {
            byte[] content = os.toByteArray();
            InputStream is = new ByteArrayInputStream(content);
            // 设置response参数，可以打开下载页面
            response.reset();

            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes(), "iso-8859-1"));
            response.setContentLength(content.length);
            ServletOutputStream outputStream = response.getOutputStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            BufferedOutputStream bos = new BufferedOutputStream(outputStream);
            byte[] buff = new byte[8192];
            int bytesRead;
            while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);
            }
            bis.close();
            bos.close();
            outputStream.flush();
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


}