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package com.github.commons.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.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.*;

public class MyExcelUtil{
	public static String NO_DEFINE = "no_define";//未定义的字段
	public static String DEFAULT_DATE_PATTERN="yyyy年MM月dd日";//默认日期格式
	public static 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 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();
		si.setAuthor("JACK");  //填加xls文件作者信息
		si.setApplicationName("导出程序"); //填加xls文件创建程序信息
		si.setLastAuthor("最后保存者信息"); //填加xls文件最后保存者信息
		si.setComments("JACK is a programmer!"); //填加xls文件作者信息
		si.setTitle("POI导出Excel"); //填加xls文件标题信息
		si.setSubject("POI导出Excel");//填加文件主题信息
		si.setCreateDateTime(new Date());
		//表头样式
		HSSFCellStyle titleStyle = workbook.createCellStyle();
		titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		HSSFFont titleFont = workbook.createFont();
		titleFont.setFontHeightInPoints((short) 20);
		titleFont.setBoldweight((short) 700);
		titleStyle.setFont(titleFont);
		// 列头样式
		HSSFCellStyle headerStyle = workbook.createCellStyle();
		headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
		headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		HSSFFont headerFont = workbook.createFont();
		headerFont.setFontHeightInPoints((short) 12);
		headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		headerStyle.setFont(headerFont);
		// 单元格样式
		HSSFCellStyle cellStyle = workbook.createCellStyle();
		cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
		cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		HSSFFont cellFont = workbook.createFont();
		cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		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
		int minBytes = colWidth 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){
				if ( rowIndex != 0 ) sheet = workbook.createSheet();//如果数据超过了，则在第二页显示

				HSSFRow titleRow = sheet.createRow(0);//表头 rowIndex=0
				titleRow.createCell(0).setCellValue(title);
				titleRow.getCell(0).setCellStyle(titleStyle);
				sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1));

				HSSFRow headerRow = sheet.createRow(1); //列头 rowIndex =1
				for(int i=0;i headMap,JSONArray jsonArray,String datePattern,int colWidth, OutputStream out) {
		if(datePattern==null) datePattern = DEFAULT_DATE_PATTERN;
		// 声明一个工作薄
		SXSSFWorkbook workbook = new SXSSFWorkbook(1000);//缓存
		workbook.setCompressTempFiles(true);
		//表头样式
		CellStyle titleStyle = workbook.createCellStyle();
		titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		Font titleFont = workbook.createFont();
		titleFont.setFontHeightInPoints((short) 20);
		titleFont.setBoldweight((short) 700);
		titleStyle.setFont(titleFont);
		// 列头样式
		CellStyle headerStyle = workbook.createCellStyle();
		//headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
		headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
		headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		Font headerFont = workbook.createFont();
		headerFont.setFontHeightInPoints((short) 12);
		headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		headerStyle.setFont(headerFont);
		// 单元格样式
		CellStyle cellStyle = workbook.createCellStyle();
		//cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
		cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
		cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		Font cellFont = workbook.createFont();
		cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		cellStyle.setFont(cellFont);
		// 生成一个(带标题)表格
		SXSSFSheet sheet = workbook.createSheet();
		//设置列宽
		int minBytes = colWidth 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 ) sheet = workbook.createSheet();//如果数据超过了，则在第二页显示

				SXSSFRow titleRow = sheet.createRow(0);//表头 rowIndex=0
				titleRow.createCell(0).setCellValue(title);
				titleRow.getCell(0).setCellStyle(titleStyle);
				sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1));

				SXSSFRow headerRow = sheet.createRow(1); //列头 rowIndex =1
				for(int i=0;i headMap = new LinkedHashMap();
			while(parameterNames.hasMoreElements()){

				String parkey = (String) parameterNames.nextElement();
				if(parkey.startsWith("*")){
					String parvalue =request.getParameter(parkey);
					headMap.put(parkey.substring(1,parkey.length()), parvalue);
				}
			}

			ByteArrayOutputStream os = new ByteArrayOutputStream();
			MyExcelUtil.exportExcelX(title,headMap,ja,datePattern,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();
		}
	}
	//Web 导出excel 需要封装Map
	public static void downloadExcelFile(String title,Map headMap,JSONArray ja,String datePattern,int colWidth,HttpServletResponse response){
		try {

			ByteArrayOutputStream os = new ByteArrayOutputStream();
			MyExcelUtil.exportExcelX(title,headMap,ja,datePattern,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();
		}
	}
}




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