Code to convert JSON to Excel in Java. Have a look at this article for further details: https://kb.aspose.com/cells/java/how-to-convert-json-to-excel-in-java/

Convert JSON To Excel In Java.java

import java.nio.file.Files;
import java.nio.file.Paths;

import com.aspose.cells.CellsFactory;
import com.aspose.cells.Color;
import com.aspose.cells.JsonLayoutOptions;
import com.aspose.cells.JsonUtility;
import com.aspose.cells.License;
import com.aspose.cells.Style;
import com.aspose.cells.TextAlignmentType;
import com.aspose.cells.Workbook;
import com.aspose.cells.Worksheet;

public class ConvertJsonToExcelInJava {

	public static void main(String[] args) throws Exception { //main function for ConvertJsonToExcelInJava class to convert JSON to Excel in Java
	// Use Aspose.Cells license to remove watermark in the output Excel file generated from JSON data
	License licenseForJsonToXlsx = new License(); 
	licenseForJsonToXlsx.setLicense("Aspose.Cells.lic");
				
        // Create a new workbook that will be used to save JSON data in Excel
        Workbook wbToSaveJson = new Workbook();

        // Get the target worksheet reference in the loaded workbook
        Worksheet worksheetRef = wbToSaveJson.getWorksheets().get(0);

        // Load the JSON data into a string variable from the source JSON file 
        String jsonString = new String(Files.readAllBytes(Paths.get("SampleJsonData.json")));

        // Instantiate the style object for formatting the JSON data in output Excel
        CellsFactory asposeCellsFactory = new CellsFactory();
        Style styleForTitle = asposeCellsFactory.createStyle();
        styleForTitle.setHorizontalAlignment(TextAlignmentType.CENTER);
        styleForTitle.getFont().setColor(Color.getBlueViolet());
        styleForTitle.getFont().setBold(true);

        // Create the JsonLayoutOptions class object to format data while calling importData() function
        JsonLayoutOptions jsonLayoutOptions = new JsonLayoutOptions();
        jsonLayoutOptions.setTitleStyle(styleForTitle);
        jsonLayoutOptions.setArrayAsTable(true);

        // Use the importData() function by providing required parameters
        JsonUtility.importData(jsonString, worksheetRef.getCells(), 3, 5, jsonLayoutOptions);

        // Save the resultant workbook containing the JSON data
        wbToSaveJson.save("OutputXlsx.xlsx");
	}
}