JAVA 读取EXCEL

private static String getCellFormatValue(HSSFCell cell) {
String cellvalue = "";
if (cell != null) {
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_NUMERIC:
cellvalue = String.valueOf(cell.getNumericCellValue());
case HSSFCell.CELL_TYPE_FORMULA: {

if (HSSFDateUtil.isCellDateFormatted(cell)) {
Date date = cell.getDateCellValue();
cellvalue = cell.getDateCellValue().toLocaleString();
} else {
double num = new Double((double) cell.getNumericCellValue());
cellvalue = String.valueOf(num);
}
break;
}

case HSSFCell.CELL_TYPE_STRING:
cellvalue = cell.getStringCellValue();
break;
default:
cellvalue = "";
}
} else {
cellvalue = "";
}
return cellvalue.trim();
}