import jxl.write.WritableCellFormat; //導入方法依賴的package包/類

/**

* @param workSheet to add the help to

* @param table to fetch metadata from

* @param startRow to start adding rows at

* @param helpTextRowNumbers - map to insert row numbers for each help field into

* @return the index of the next row to use

* @throws WriteException if any of the writes to workSheet failed

*/

private int outputHelp(WritableSheet workSheet, Table table, final int startRow, final Map helpTextRowNumbers) throws WriteException {

int currentRow = startRow;

// Title for the descriptions

Label dataLabel = new Label(0, currentRow, "Column Descriptions");

dataLabel.setCellFormat(getBoldFormat());

workSheet.addCell(dataLabel);

currentRow++;

int currentColumn = 0;

for (Column column : table.columns()) {

if (!column.getName().equals("id") && !column.getName().equals("version")) {

// Field name to go with the description

Label fieldName = new Label(0, currentRow, spreadsheetifyName(column.getName()));

fieldName.setCellFormat(getBoldFormat());

workSheet.addCell(fieldName);

// The type/width

String typeString = column.getType() + "(" + column.getWidth() + (column.getScale() == 0 ? "" : "," + column.getScale()) + ")";

Label fieldType = new Label(1, currentRow, typeString);

fieldType.setCellFormat(getStandardFormat());

workSheet.addCell(fieldType);

// The default

String defaultValue = additionalSchemaData.columnDefaultValue(table, column.getName());

Label fieldDefault = new Label(2, currentRow, defaultValue);

fieldDefault.setCellFormat(getStandardFormat());

workSheet.addCell(fieldDefault);

// The field documentation

workSheet.mergeCells(3, currentRow, 12, currentRow);

String documentation = additionalSchemaData.columnDocumentation(table, column.getName());

Label documentationLabel = new Label(3, currentRow, documentation);

WritableCellFormat format = new WritableCellFormat(getStandardFormat());

format.setWrap(true);

format.setVerticalAlignment(VerticalAlignment.TOP);

documentationLabel.setCellFormat(format);

workSheet.addCell(documentationLabel);

//If we've exceed the maximum number of columns - then output truncated warnings

if(currentColumn >= MAX_EXCEL_COLUMNS) {

Label truncatedWarning = new Label(13, currentRow, "[TRUNCATED]");

truncatedWarning.setCellFormat(getBoldFormat());

workSheet.addCell(truncatedWarning);

}

// We are aiming for 150px. 1px is 15 Excel "Units"

workSheet.setRowView(currentRow, 150 * 15);

// Remember at what row we created the help text for this column

helpTextRowNumbers.put(column.getName(), currentRow);

currentRow++;

currentColumn++;

}

}

// Group all the help rows together

workSheet.setRowGroup(startRow + 1, currentRow - 1, true);

// Some extra blank space for neatness

currentRow++;

return currentRow;

}

總結

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