/**
* 获得指定位置的值，返回object，可为数值，字符串，布尔类型，null类型
*
* @param column
* @return
*/
public Object getCellValueObject(int rowNum, int column) {
// 定义返回的数组
Object tempObject = null;
row = sheet.getRow(rowNum);
cell = row.getCell(column);
// 判断值类型
switch (cell.getCellType()) {
// 字符串类型
case Cell.CELL_TYPE_STRING:
tempObject = cell.getRichStringCellValue().getString();
// System.out.println(cell.getRichStringCellValue().getString());
break;
// 数值类型
case Cell.CELL_TYPE_NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
tempObject = cell.getDateCellValue();
// System.out.println(cell.getDateCellValue());
} else {
tempObject = cell.getNumericCellValue();
// System.out.println(cell.getNumericCellValue());
}
break;
// 布尔类型
case Cell.CELL_TYPE_BOOLEAN:
tempObject = cell.getBooleanCellValue();
// System.out.println(cell.getBooleanCellValue());
break;
// 数学公式类型
case Cell.CELL_TYPE_FORMULA:
tempObject = cell.getCellFormula();
// System.out.println(cell.getCellFormula());
break;
default:
System.out.println();
}
return tempObject;
}
private Collection<Object[]> loadFromSpreadsheet(final InputStream excelFile) throws IOException {
HSSFWorkbook workbook = new HSSFWorkbook(excelFile);
data = new ArrayList<Object[]>();
Sheet sheet = workbook.getSheetAt(0);
int numberOfColumns = countNonEmptyColumns(sheet);
List<Object[]> rows = new ArrayList<Object[]>();
List<Object> rowData = new ArrayList<Object>();
for (Row row : sheet) {
if (isEmpty(row)) {
break;
} else {
rowData.clear();
for (int column = 0; column < numberOfColumns; column++) {
Cell cell = row.getCell(column);
rowData.add(objectFrom(workbook, cell));
}
rows.add(rowData.toArray());
}
}
return rows;
}
private boolean isEmpty(final Row row) {
Cell firstCell = row.getCell(0);
boolean rowIsEmpty = (firstCell == null) || (firstCell.getCellType() == Cell.CELL_TYPE_BLANK);
return rowIsEmpty;
}
public static void readExcelFile(String fileName) {
FileInputStream file;
try {
file = new FileInputStream(new File(fileName));
Workbook excelFile = new HSSFWorkbook(file);
Sheet sheet1 = excelFile.getSheetAt(0); // Data sheet
// Set just in case metadata is incomplete or malformed
classificationLocation =
sheet1.getRow(0).getPhysicalNumberOfCells()
- 1; // Minus one since classificationLocation includes 0 and getPhysicalNumberOfCells
// does not
Sheet sheet2 = excelFile.getSheetAt(1); // Metadata sheet
// Loop based on number of attribute names
for (int i = 0; i < sheet2.getRow(0).getPhysicalNumberOfCells(); i++) {
String[] metadata = new String[METADATASIZE];
// Construct metadata
Row currRow = sheet2.getRow(0); // This should be a row of names
metadata[0] = currRow.getCell(i).toString();
currRow = sheet2.getRow(1); // This should be a row of data types (discrete or continuous)
metadata[1] = currRow.getCell(i).toString();
currRow = sheet2.getRow(2); // This should say which one is the classifier
if (currRow.getCell(i) == null
|| currRow.getCell(i).getCellType() == Cell.CELL_TYPE_BLANK) {
metadata[2] = "attribute";
} else {
metadata[2] = "classifier";
classificationLocation = i;
}
metadataLL.add(metadata);
}
for (Row row : sheet1) {
String data[] = new String[row.getPhysicalNumberOfCells() - 1];
int offset =
0; // Used so that we can declare an array of the size of the attributes without the
// classification
for (Cell cell : row) {
int index = cell.getColumnIndex();
if (classificationLocation != index) {
data[index - offset] = cell.toString();
} else {
classificationsLL.add(cell.toString());
// Moved to generate training data so that we do not get possible classifications from
// unknown data since some denote unknown by saying ?
// //Check to see if we have seen it yet
//
// int occurrences = 0;
// for(int i = 0; i < classificationTypes.size(); i++)
// {
// if(classificationTypes.get(i).compareTo(cell.toString()) == 0)
// {
// occurrences++;
// }
// }
// if(occurrences == 0)
// {
// classificationTypes.add(cell.toString());
// }
offset++;
}
}
dataLL.add(data);
// classCount = temp.length;
}
excelFile.close();
} catch (FileNotFoundException e) {
System.out.println("Error file not found");
System.exit(0);
} catch (IOException e) {
System.out.println("Unable to read file, disk drive may be failing");
e.printStackTrace();
System.exit(0);
}
}
