用POI读取具有任意合并单元的excel数据

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 ""; 
} 
}


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