用POI读取具有任意合并单元的excel数据

原文：http://blog.csdn.net/ycb1689/article/details/9764191

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 “”;
}
}