通过处理智能标记生成图表
Aspose.Cells API提供WorkbookDesigner类来处理智能标记,其中格式和公式位于设计者电子表格中,然后根据指定的数据源对其进行处理,以根据智能标记填充数据。也可以通过处理智能标记来创建Excel图表,需要以下步骤。
- 创建设计者电子表格
- 根据指定的数据源处理设计者电子表格
- 基于填充数据创建图表
创建设计者电子表格
设计者电子表格是使用Microsoft Excel应用程序或Aspose.Cells API创建的简单Excel文件,包含可在运行时填充的视觉格式、公式和智能标记的内容。
为简化起见,我们将使用 Aspose.Cells for Java API 创建设计电子表格,然后针对动态创建的数据源进行处理,以进行演示目的。
Java
//Create an instance of Workbook
Workbook book = new Workbook();
//Access the first (default) Worksheet from the collection
Worksheet dataSheet = book.getWorksheets().get(0);
//Name the first Worksheet for referencing
dataSheet.setName("ChartData");
//Access the CellsCollection of ChartData Worksheet
Cells cells = dataSheet.getCells();
//Place the markers in the Worksheet according to desired layout
cells.get("A1").putValue("&=$Headers(horizontal)");
cells.get("A2").putValue("&=$Year2000(horizontal)");
cells.get("A3").putValue("&=$Year2005(horizontal)");
cells.get("A4").putValue("&=$Year2010(horizontal)");
cells.get("A5").putValue("&=$Year2015(horizontal)");
如果您在此阶段保存生成的电子表格,则工作表中的数据将如下所示。
处理设计者电子表格
为了处理设计者电子表格,我们必须具有与设计者电子表格中使用的智能标记相对应的数据源。例如,我们创建了一个名为**&=$Headers(horizontal)**的智能标记条目,该条目表示名称为Headers的变量,而**(horizontal)**键表示数据应水平填充。
为了演示这种用例,我们将从头开始创建数据源,并根据前一步骤创建的设计者电子表格对其进行处理。但是,在实时场景中,数据可能已经可用于进一步处理,因此如果数据已经可用,则可以跳过创建数据源的过程。
Java
//Create string arrays which will serve as data sources to the smart markers
String[] headers = new String[]{"", "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6", "Item 7", "Item 8", "Item 9", "Item 10", "Item 11", "Item 12"};
String[] year2000 = new String[]{"2000", "310", "0", "110", "15", "20", "25", "30", "1222", "200", "421", "210", "133"};
String[] year2005 = new String[]{"2005", "508", "0", "170", "280", "190", "400", "105", "132", "303", "199", "120", "100"};
String[] year2010 = new String[]{"2010", "0", "210", "230", "1420", "1530", "160", "170", "110", "199", "129", "120", "230"};
String[] year2015 = new String[]{"2015", "2818", "320", "340", "260", "210", "310", "220", "0", "0", "0", "0", "122"};
处理智能标记非常简单,如下所示。
Java
//Create an instance of WorkbookDesigner
WorkbookDesigner designer = new WorkbookDesigner();
//Set the Workbook property for the instance of WorkbookDesigner
designer.setWorkbook(book);
//Set data sources for smart markers
designer.setDataSource("Headers", headers);
designer.setDataSource("Year2000", year2000);
designer.setDataSource("Year2005", year2005);
designer.setDataSource("Year2010", year2010);
designer.setDataSource("Year2015", year2015);
//Process the designer spreadsheet against the provided data sources
designer.process();
如果您在此阶段保存该电子表格,则数据将如下所示。
创建图表
一旦数据准备就绪,我们所需要做的就是基于数据源创建图表。为了让示例简单,我们将使用Chart.setChartDataRange方法,这样我们就不必进一步配置图表。
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java | |
// The path to the documents directory. | |
String dataDir = Utils.getDataDir(GenerateChartByProcessingSmartMarkers.class); | |
// Create an instance of Workbook | |
Workbook book = new Workbook(); | |
// Access the first (default) Worksheet from the collection | |
Worksheet dataSheet = book.getWorksheets().get(0); | |
// Name the first Worksheet for referencing | |
dataSheet.setName("ChartData"); | |
// Access the CellsCollection of ChartData Worksheet | |
Cells cells = dataSheet.getCells(); | |
// Place the markers in the Worksheet according to desired layout | |
cells.get("A1").putValue("&=$Headers(horizontal)"); | |
cells.get("A2").putValue("&=$Year2000(horizontal)"); | |
cells.get("A3").putValue("&=$Year2005(horizontal)"); | |
cells.get("A4").putValue("&=$Year2010(horizontal)"); | |
cells.get("A5").putValue("&=$Year2015(horizontal)"); | |
// Create string arrays which will serve as data sources to the smart markers | |
String[] headers = new String[] { "", "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6", "Item 7", | |
"Item 8", "Item 9", "Item 10", "Item 11", "Item 12" }; | |
String[] year2000 = new String[] { "2000", "310", "0", "110", "15", "20", "25", "30", "1222", "200", "421", | |
"210", "133" }; | |
String[] year2005 = new String[] { "2005", "508", "0", "170", "280", "190", "400", "105", "132", "303", "199", | |
"120", "100" }; | |
String[] year2010 = new String[] { "2010", "0", "210", "230", "1420", "1530", "160", "170", "110", "199", "129", | |
"120", "230" }; | |
String[] year2015 = new String[] { "2015", "2818", "320", "340", "260", "210", "310", "220", "0", "0", "0", "0", | |
"122" }; | |
// Create an instance of WorkbookDesigner | |
WorkbookDesigner designer = new WorkbookDesigner(); | |
// Set the Workbook property for the instance of WorkbookDesigner | |
designer.setWorkbook(book); | |
// Set data sources for smart markers | |
designer.setDataSource("Headers", headers); | |
designer.setDataSource("Year2000", year2000); | |
designer.setDataSource("Year2005", year2005); | |
designer.setDataSource("Year2010", year2010); | |
designer.setDataSource("Year2015", year2015); | |
// Process the designer spreadsheet against the provided data sources | |
designer.process(); | |
// Convert all string values of ChartData to numbers | |
// This is an additional step as we have imported the string values | |
dataSheet.getCells().convertStringToNumericValue(); | |
// Save the number of rows & columns from the ChartData in separate variables | |
// These values will be used later to identify the chart's data range from ChartData | |
int chartRows = dataSheet.getCells().getMaxDataRow() + 1; | |
int chartCols = dataSheet.getCells().getMaxDataColumn() + 1; | |
// Add a new Worksheet of type Chart to Workbook | |
int chartSheetIdx = book.getWorksheets().add(SheetType.CHART); | |
// Access the newly added Worksheet via its index | |
Worksheet chartSheet = book.getWorksheets().get(chartSheetIdx); | |
// Name the Worksheet | |
chartSheet.setName("Chart"); | |
// Add a chart of type ColumnStacked to newly added Worksheet | |
int chartIdx = chartSheet.getCharts().add(ChartType.COLUMN_STACKED, 0, 0, chartRows, chartCols); | |
// Access the newly added Chart via its index | |
Chart chart = chartSheet.getCharts().get(chartIdx); | |
// Identify the chart's data range | |
Range dataRange = dataSheet.getCells().createRange(0, 1, chartRows, chartCols - 1); | |
// Set the data range for the chart | |
chart.setChartDataRange(dataRange.getRefersTo(), false); | |
// Set the chart to size with window | |
chart.setSizeWithWindow(true); | |
// Set the format for the tick labels | |
chart.getValueAxis().getTickLabels().setNumberFormat("$###,### K"); | |
// Set chart title | |
chart.getTitle().setText("Sales Summary"); | |
// Set ChartSheet an active sheet | |
book.getWorksheets().setActiveSheetIndex(chartSheetIdx); | |
// Save the final result | |
book.save(dataDir + "report.xlsx"); |
最终图表如下所示。