Using Adams Excel for chart generation in Java class libraries: visualizing data partitioning

Using Adams Excel for Chart Generation in Java Class Library: Visual Data Analysis Importing the Adams Excel class library is a common way to use Excel functionality in Java applications. With Adams Excel, we can easily generate various charts to achieve visual analysis of data. This article will introduce how to use Adams Excel for chart generation in Java, as well as some sample code to help readers understand the implementation process. The following are the steps to generate charts using Adams Excel in the Java class library: 1. Import the Adams Excel class library: First, we need to add the Adams Excel class library to the Java project. This can be achieved by adding the jar file from the Adams Excel library to the project's classpath. This can usually be found on the Adams Excel official website. 2. Create an Excel document: In Java code, we need to create an Excel document object so that we can add charts to it. You can use the classes and methods provided by the Adams Excel class library to achieve this step. The following is an example code for creating an Excel document object: import org.apache.poi.ss.usermodel.*; import org.apache.poi.xssf.usermodel.XSSFWorkbook; //Creating Excel Document Objects Workbook workbook = new XSSFWorkbook(); Sheet sheet = workbook.createSheet("Sheet1"); //Add data to the Excel document as needed Row row = sheet.createRow(0); Cell cell1 = row.createCell(0); Cell1. setCellValue ("Data1"); Cell cell2 = row.createCell(1); Cell2. setCellValue ("Data2"); 3. Generate Chart: Next, we can use the classes and methods provided in the Adams Excel class library to create and configure chart objects. The following is an example code for adding a bar chart to an Excel document: import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.*; import org.apache.poi.xssf.usermodel.*; //Create a bar chart object XSSFSheet chartSheet = workbook.createSheet("Chart"); Drawing drawing = chartSheet.createDrawingPatriarch(); ClientAnchor anchor = drawing.createAnchor(0, 0, 0, 0, 4, 0, 14, 15); Chart chart = drawing.createChart(anchor); //Configure Chart Properties ChartLegend legend = chart.getOrCreateLegend(); legend.setPosition(LegendPosition.BOTTOM); ChartAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM); ValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT); leftAxis.setCrosses(AxisCrosses.AUTO_ZERO); //Create Dataset Sheet sheet = workbook.getSheet("Sheet1"); int rowCount = sheet.getLastRowNum() + 1; String[] categories = new String[rowCount - 1]; Number[] values = new Number[rowCount - 1]; for (int i = 1; i < rowCount; i++) { Row dataRow = sheet.getRow(i); categories[i - 1] = dataRow.getCell(0).getStringCellValue(); values[i-1] = dataRow.getCell(1).getNumericCellValue(); } //Adding a Dataset to a Chart chart.addCategoryAxisLabel(TitleType.CATEGORY, categories); chart.addData(values); //Add a chart to an Excel document XSSFDrawing xssfDrawing = chartSheet.createDrawingPatriarch(); XSSFClientAnchor xssfClientAnchor = xssfDrawing.createAnchor(0, 0, 0, 0, 0, 6, 10, 20); XssfDrawing. createChart (xssfClientAnchor). setTitleText ("Bar Chart"); 4. Save Excel document: Finally, we need to save the generated Excel document to the hard drive. You can use the classes and methods provided in the Adams Excel class library to achieve this step. The following is an example code for saving an Excel document as a file: import java.io.FileOutputStream; import java.io.IOException; try { FileOutputStream fileOut = new FileOutputStream("chart.xlsx"); workbook.write(fileOut); fileOut.close(); workbook.close(); } catch (IOException e) { e.printStackTrace(); } Through the above steps, we can use the Adams Excel class library to generate various charts in Java projects. You can use other classes and methods provided by the Adams Excel class library for more advanced chart generation and configuration as needed. I hope this article can help readers understand how to use Adams Excel for chart generation in Java class libraries, and can practice related functions through example code.