代码才重要,如下。
public static void calcAndSetRowHeigt(HSSFRow sourceRow) throws Exception {
for (int cellIndex = sourceRow.getFirstCellNum(); cellIndex <= sourceRow.getPhysicalNumberOfCells(); cellIndex++) {
//行高
double maxHeight = sourceRow.getHeight();
HSSFCell sourceCell = sourceRow.getCell(cellIndex);
//单元格的内容
String cellContent = getCellContentAsString(sourceCell);
if (null == cellContent || "".equals(cellContent)) {
continue;
}
//单元格的宽高及单元格信息
Map<String, Object> cellInfoMap = getCellInfo(sourceCell);
Integer cellWidth = (Integer) cellInfoMap.get("width");
Integer cellHeight = (Integer) cellInfoMap.get("height");
if (cellHeight > maxHeight) {
maxHeight = cellHeight;
}
System.out.println("单元格的宽度 : " + cellWidth + " 单元格的高度 : " + maxHeight + ", 单元格的内容 : " + cellContent);
HSSFCellStyle cellStyle = sourceCell.getCellStyle();
HSSFFont font = cellStyle.getFont(sourceRow.getSheet().getWorkbook());
//字体的高度
short fontHeight = font.getFontHeight();
//cell内容字符串总宽度
double cellContentWidth = cellContent.getBytes().length * 2 * 256;
//字符串需要的行数 不做四舍五入之类的操作
double stringNeedsRows = (double) cellContentWidth / cellWidth;
//小于一行补足一行
if (stringNeedsRows < 1.0) {
stringNeedsRows = 1.0;
}
//需要的高度 (Math.floor(stringNeedsRows) - 1) * 40 为两行之间空白高度
double stringNeedsHeight = (double) fontHeight * stringNeedsRows;
//需要重设行高
if (stringNeedsHeight > maxHeight) {
maxHeight = stringNeedsHeight;
//超过原行高三倍 则为5倍 实际应用中可做参数配置
if (maxHeight / cellHeight > 5) {
maxHeight = 5 * cellHeight;
}
//最后取天花板防止高度不够
maxHeight = Math.ceil(maxHeight);
//重新设置行高 同时处理多行合并单元格的情况
Boolean isPartOfRowsRegion = (Boolean) cellInfoMap.get("isPartOfRowsRegion");
if (isPartOfRowsRegion) {
Integer firstRow = (Integer) cellInfoMap.get("firstRow");
Integer lastRow = (Integer) cellInfoMap.get("lastRow");
//平均每行需要增加的行高
double addHeight = (maxHeight - cellHeight) / (lastRow - firstRow + 1);
for (int i = firstRow; i <= lastRow; i++) {
double rowsRegionHeight = sourceRow.getSheet().getRow(i).getHeight() + addHeight;
if (rowsRegionHeight < 600) {
sourceRow.setHeight((short) 600);
} else {
sourceRow.getSheet().getRow(i).setHeight((short) 600);
}
}
} else {
if (maxHeight < 300) {
sourceRow.setHeight((short) 300);
} else {
sourceRow.setHeight((short) maxHeight);
}
}
}
System.out.println("字体高度 : " + fontHeight + ", 字符串宽度 : " + cellContentWidth + ", 字符串需要的行数 : " + stringNeedsRows + ", 需要的高度 : " + stringNeedsHeight + ", 现在的行高 : " + maxHeight);
System.out.println();
}
}
/**
* 解析一个单元格得到数据
*
* @param cell
* @return
*/
private static String getCellContentAsString(HSSFCell cell) throws Exception {
if (null == cell) {
return "";
}
String result = "";
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
String s = String.valueOf(cell.getNumericCellValue());
if (s != null) {
if (s.endsWith(".0")) {
s = s.substring(0, s.length() - 2);
}
}
result = s;
break;
case Cell.CELL_TYPE_STRING:
result = StringUtil.nulltoempty(String.valueOf(cell.getStringCellValue())).trim();
break;
case Cell.CELL_TYPE_BLANK:
break;
case Cell.CELL_TYPE_BOOLEAN:
result = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_ERROR:
break;
default:
break;
}
return result;
}
/**
* 获取单元格及合并单元格的宽度
*
* @param cell
* @return
*/
private static Map<String, Object> getCellInfo(HSSFCell cell) {
HSSFSheet sheet = cell.getSheet();
int rowIndex = cell.getRowIndex();
int columnIndex = cell.getColumnIndex();
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;
}
}
}
Map<String, Object> map = new HashMap<String, Object>();
Integer width = 0;
Integer height = 0;
boolean isPartOfRowsRegion = false;
if (isPartOfRegion) {
for (int i = firstColumn; i <= lastColumn; i++) {
width += sheet.getColumnWidth(i);
}
for (int i = firstRow; i <= lastRow; i++) {
height += sheet.getRow(i).getHeight();
}
if (lastRow > firstRow) {
isPartOfRowsRegion = true;
}
} else {
width = sheet.getColumnWidth(columnIndex);
height += cell.getRow().getHeight();
}
map.put("isPartOfRowsRegion", isPartOfRowsRegion);
map.put("firstRow", firstRow);
map.put("lastRow", lastRow);
map.put("width", width);
map.put("height", height);
return map;
}
可按需要稍作修改。