package com.report;
import java.io.File;
import java.io.IOException;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
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.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;
//import org.junit.Test;

/**
 * 
 * @author wcyong
 *
 * @date   2013-6-21
 */
public class TestReadMergeRegionExcel {

	//@Test
	public void testReadExcel() {
		//readExcelToObj(“f:\\test\\out3.xls”);
	}

	/**
	 * 读取excel数据
	 * @param path
	 */
	private void readExcelToObj(String path) {

		Workbook wb = null;
		try {
			wb = WorkbookFactory.create(new File(path));
			readExcel(wb, 0, 0, 0);
		} catch (InvalidFormatException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 读取excel文件
	 * @param wb 
	 * @param sheetIndex sheet页下标：从0开始
	 * @param startReadLine 开始读取的行:从0开始
	 * @param tailLine 去除最后读取的行
	 */
	private void readExcel(Workbook wb,int sheetIndex, int startReadLine, int tailLine) {
		Sheet sheet = wb.getSheetAt(sheetIndex);
		Row row = null;

		for(int i=startReadLine; i<sheet.getLastRowNum()-tailLine+1; i++) {
			row = sheet.getRow(i);
			for(Cell c : row) {
				boolean isMerge = isMergedRegion(sheet, i, c.getColumnIndex());
				//判断是否具有合并单元格
				if(isMerge) {
					String rs = getMergedRegionValue(sheet, row.getRowNum(), c.getColumnIndex());
					System.out.print(rs + " ");
				}else {
					System.out.print(c.getRichStringCellValue()+" ");
				}
			}
			System.out.println();

		}

	}

	/** 
	 * 获取合并单元格的值 
	 * @param sheet 
	 * @param row 
	 * @param column 
	 * @return 
	 */  
	public String getMergedRegionValue(Sheet sheet ,int row , int column){  
		int sheetMergeCount = sheet.getNumMergedRegions();  

		for(int i = 0 ; i < sheetMergeCount ; i++){  
			CellRangeAddress ca = sheet.getMergedRegion(i);  
			int firstColumn = ca.getFirstColumn();  
			int lastColumn = ca.getLastColumn();  
			int firstRow = ca.getFirstRow();  
			int lastRow = ca.getLastRow();  

			if(row >= firstRow && row <= lastRow){  

				if(column >= firstColumn && column <= lastColumn){  
					Row fRow = sheet.getRow(firstRow);  
					Cell fCell = fRow.getCell(firstColumn);  
					return getCellValue(fCell) ;  
				}  
			}  
		}  

		return null ;  
	}  

	/**
	 * 判断合并了行
	 * @param sheet
	 * @param row
	 * @param column
	 * @return
	 */
	private boolean isMergedRow(Sheet sheet,int row ,int column) {
		int sheetMergeCount = sheet.getNumMergedRegions();
		for (int i = 0; i < sheetMergeCount; i++) {
			CellRangeAddress range = sheet.getMergedRegion(i);
			int firstColumn = range.getFirstColumn();
			int lastColumn = range.getLastColumn();
			int firstRow = range.getFirstRow();
			int lastRow = range.getLastRow();
			if(row == firstRow && row == lastRow){
				if(column >= firstColumn && column <= lastColumn){
					return true;
				}
			}
		}
		return false;
	}

	/**
	 * 判断指定的单元格是否是合并单元格
	 * @param sheet 
	 * @param row 行下标
	 * @param column 列下标
	 * @return
	 */
	private boolean isMergedRegion(Sheet sheet,int row ,int column) {
		int sheetMergeCount = sheet.getNumMergedRegions();
		for (int i = 0; i < sheetMergeCount; i++) {
			CellRangeAddress range = sheet.getMergedRegion(i);
			int firstColumn = range.getFirstColumn();
			int lastColumn = range.getLastColumn();
			int firstRow = range.getFirstRow();
			int lastRow = range.getLastRow();
			if(row >= firstRow && row <= lastRow){
				if(column >= firstColumn && column <= lastColumn){
					return true;
				}
			}
		}
		return false;
	}

	/**
	 * 判断sheet页中是否含有合并单元格 
	 * @param sheet 
	 * @return
	 */
	private boolean hasMerged(Sheet sheet) {
		return sheet.getNumMergedRegions() > 0 ? true : false;
	}

	/**
	 * 合并单元格
	 * @param sheet 
	 * @param firstRow 开始行
	 * @param lastRow 结束行
	 * @param firstCol 开始列
	 * @param lastCol 结束列
	 */
	private void mergeRegion(Sheet sheet, int firstRow, int lastRow, int firstCol, int lastCol) {
		sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
	}

	/** 
	 * 获取单元格的值 
	 * @param cell 
	 * @return 
	 */  
	public String getCellValue(Cell cell){  

		if(cell == null) return "";  

		if(cell.getCellType() == Cell.CELL_TYPE_STRING){  

			return cell.getStringCellValue();  

		}else if(cell.getCellType() == Cell.CELL_TYPE_BOOLEAN){  

			return String.valueOf(cell.getBooleanCellValue());  

		}else if(cell.getCellType() == Cell.CELL_TYPE_FORMULA){  

			return cell.getCellFormula();  

		}else if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){  

			return String.valueOf(cell.getNumericCellValue());  

		}  
		return "";  
	}  
}