package com.flow.util;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
// 导入正确的类
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
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.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;

/**
 * 导出Excel公共方法
 * 
 * @version 1.0
 * @author leeway
 */
public class ExcelUtils {

	// 显示的导出表的标题
	private String title;
	// 导出表的列名
	private String[] rowName;
	private List<Object[]> dataList = new ArrayList<Object[]>();

	// 构造函数，传入要导出的数据
	public ExcelUtils(String title, String[] rowName, List<Object[]> dataList) {
		this.dataList = dataList;
		this.rowName = rowName;
		this.title = title;
	}

	// 导出数据
	public void export(OutputStream out) throws Exception {
		try {
			HSSFWorkbook workbook = new HSSFWorkbook();
			HSSFSheet sheet = workbook.createSheet(title);

			// 产生表格标题行
			HSSFRow rowm = sheet.createRow(0);
			HSSFCell cellTitle = rowm.createCell(0);

			// sheet样式定义【】
			HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);
			HSSFCellStyle style = this.getStyle(workbook);
			sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length - 1)));
			cellTitle.setCellStyle(columnTopStyle);
			cellTitle.setCellValue(title);

			// 定义所需列数
			int columnNum = rowName.length;
			HSSFRow rowRowName = sheet.createRow(2);

			// 将列头设置到sheet的单元格中
			for (int n = 0; n < columnNum; n++) {
				HSSFCell cellRowName = rowRowName.createCell(n);
				cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);
				HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
				cellRowName.setCellValue(text);
				cellRowName.setCellStyle(columnTopStyle);

			}
			// 将查询到的数据设置到sheet对应的单元格中
			for (int i = 0; i < dataList.size(); i++) {
				Object[] obj = dataList.get(i);// 遍历每个对象
				HSSFRow row = sheet.createRow(i + 3);// 创建所需的行数

				for (int j = 0; j < obj.length; j++) {
					HSSFCell cell = null; // 设置单元格的数据类型
					/*
					 * if (j == 0) { cell = row.createCell(j,
					 * HSSFCell.CELL_TYPE_NUMERIC); cell.setCellValue(i + 1); }
					 * else { cell = row.createCell(j,
					 * HSSFCell.CELL_TYPE_STRING); if (!"".equals(obj[j]) &&
					 * obj[j] != null) { cell.setCellValue(obj[j].toString());
					 * // 设置单元格的值 } }
					 */
					cell = row.createCell(j, HSSFCell.CELL_TYPE_STRING);

					if (obj[j] == null || "".equals(obj[j])) {
						cell.setCellValue("-"); // 设置单元格的值
					} else {
						cell.setCellValue(obj[j].toString()); // 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;
					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);
				}
			}

			if (workbook != null) {
				try {

					workbook.write(out);

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

		} catch (Exception e) {

		}
	}

	/*
	 * 列头单元格样式
	 */
	public 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("STSong");
		// 设置样式
		HSSFCellStyle style = workbook.createCellStyle();
		// 设置低边框
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		// 设置低边框颜色
		style.setBottomBorderColor(HSSFColor.BLACK.index);
		// 设置右边框
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		// 设置顶边框
		style.setTopBorderColor(HSSFColor.BLACK.index);
		// 设置顶边框颜色
		style.setTopBorderColor(HSSFColor.BLACK.index);
		// 在样式中应用设置的字体
		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);
		style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		return style;

	}

	public 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("STSong");
		// 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;
	}
}