import java.text.SimpleDateFormat;java
import java.util.Date;apache
import org.apache.commons.lang3.StringUtils;字體
import org.apache.poi.hssf.usermodel.HSSFCell;ui
import org.apache.poi.hssf.usermodel.HSSFDataFormat;spa
import org.apache.poi.hssf.usermodel.HSSFDateUtil;.net
import org.apache.poi.hssf.usermodel.HSSFRow;excel
import org.apache.poi.hssf.usermodel.HSSFSheet;orm
import org.apache.poi.hssf.usermodel.HSSFWorkbook;get
import org.apache.poi.ss.usermodel.Cell;it
import org.apache.poi.ss.util.CellRangeAddress;
/**
* excel行自適應高度
* @author lw
* @version 2019年8月27日 下午1:59:27
*/
public class AutoRowHeightUtil
{
/**
* 自適應excel行高
* @author lw
* @date 2019年8月27日 上午10:27:33
* @param cell 列
* @param margin 字體邊距
*/
public static void autoRowHeight(HSSFCell cell, short margin)
{
if(cell == null)
{
return ;
}
String cellVal = getStringCellValue(cell) ;
if(StringUtils.isBlank(cellVal))
{
return ;
}
HSSFRow row = cell.getRow();
HSSFWorkbook workbook = row.getSheet().getWorkbook();
short charHeight = cell.getCellStyle().getFont(workbook).getFontHeightInPoints();
float charPx = charHeight / (float)72 * (float)96;//字體像素
float cellWidthPx = getCellWidth(cell);//寬度像素
int charLength = cellVal.length();//字符長度
int charInCell = (int)(cellWidthPx / charPx);//每一個列（包括合併的列）的字數
//在指定寬度的列中的字符展現行數
int rowNum = charLength/ charInCell + (charLength % charInCell > 0 ? 1 : 0);
//自適應以後的行高點數
short cellHeightPx = (short) (((short)rowNum) * (charHeight + margin));
row.setHeightInPoints(cellHeightPx);
}
/**
* 自適應excel行高
* @author lw
* @date 2019年8月27日 上午10:27:33
* @param cell 列
*/
private static String getStringCellValue(Cell cell)
{
switch (cell.getCellType())
{
case HSSFCell.CELL_TYPE_FORMULA:
if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("yyyy-MM-dd"))
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
}
return cell.getCellFormula();
case HSSFCell.CELL_TYPE_STRING:
return cell.getStringCellValue();
case HSSFCell.CELL_TYPE_NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell))
{
String dateStr = "";
int style = cell.getCellStyle().getDataFormat();
Date date = cell.getDateCellValue();
// 對不一樣格式的日期類型作不一樣的輸出，與單元格格式保持一致
switch (style)
{
case 178:
dateStr = new SimpleDateFormat("yyyy'年'M'月'd'日'").format(date);
break;
case 14:
dateStr = new SimpleDateFormat("yyyy-MM-dd").format(date);
break;
case 179:
dateStr = new SimpleDateFormat("yyyy/MM/dd HH:mm").format(date);
break;
case 181:
dateStr = new SimpleDateFormat("yyyy/MM/dd HH:mm a ").format(date);
break;
case 22:
dateStr = new SimpleDateFormat(" yyyy/MM/dd HH:mm:ss ").format(date);
break;
default:
break;
}
return dateStr;
}
else
{
cell.setCellType(Cell.CELL_TYPE_STRING);
}
return cell.getStringCellValue();
case HSSFCell.CELL_TYPE_BOOLEAN:
return cell.getBooleanCellValue() ? "TRUE" : "FALSE";
default:
return "";
}
}
/**
* 獲取單元格及合併單元格的寬度
* @author lw
* @date 2019年6月28日 下午1:58:42
* @param cell 單元格
* @return 單元格及合併單元格的寬度（像素）
*/
private static float getCellWidth(HSSFCell cell)
{
if(cell == null )
{
return 0;
}
HSSFSheet sheet = cell.getSheet();
int rowIndex = cell.getRowIndex();
int columnIndex = cell.getColumnIndex();
float width = sheet.getColumnWidthInPixels(columnIndex);
boolean isPartOfRegion = false;
int firstColumn = 0;
int lastColumn = 0;
int firstRow = 0;
int lastRow = 0;
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++)
{
CellRangeAddress ca = sheet.getMergedRegion(i);
firstColumn = ca.getFirstColumn();
lastColumn = ca.getLastColumn();
firstRow = ca.getFirstRow();
lastRow = ca.getLastRow();
if (rowIndex == firstRow && rowIndex <= lastRow)
{
if (columnIndex == firstColumn && columnIndex <= lastColumn)
{
isPartOfRegion = true;
break;
}
}
}
if(isPartOfRegion)
{
width = 0;
for (int i = firstColumn; i <= lastColumn; i++)
{
width += sheet.getColumnWidthInPixels(i);
}
}
return width;
}
}