import com.spire.xls.*;
import com.spire.xls.core.IChartTrendLine;

import java.awt.*;

public class AddTrendline {
    public static void main(String[] args){
        //Create a Workbook instance
        Workbook workbook = new Workbook();
        //Load the Excel file
        workbook.loadFromFile("test.xlsx");

        //Get the first chart in the first worksheet
        Chart chart = workbook.getWorksheets().get(0).getCharts().get(0);

        //Add a Trendline to the first series of the chart
        IChartTrendLine trendLine = chart.getSeries().get(0).getTrendLines().add(TrendLineType.Linear);

        //Set Trendline name
        trendLine.setName("Linear(Series1)");
        //Set line type and color
        trendLine.getBorder().setPattern(ChartLinePatternType.DashDot);
        trendLine.getBorder().setColor(Color.blue);
        //Set forward and backward value
        trendLine.setForward(0.5);
        trendLine.setBackward(0.5);
        //Set intercept value
        trendLine.setIntercept(5);

        //Display equation on chart
        trendLine.setDisplayEquation(true);
        //Display R-Squared value on chart
        trendLine.setDisplayRSquared(true);

        //Save the result file
        workbook.saveToFile("AddTrendline.xlsx", ExcelVersion.Version2013);
    }
}

import com.spire.xls.Chart;
import com.spire.xls.Workbook;
import com.spire.xls.core.IChartTrendLine;

public class ReadEquationOfTrendline {
    public static void main(String[] args){
        //Create a Workbook instance
        Workbook workbook = new Workbook();
        //Load the Excel file
        workbook.loadFromFile("AddTrendline.xlsx");

        //Get the first chart in the first worksheet
        Chart chart = workbook.getWorksheets().get(0).getCharts().get(0);

        //Read the equation of the first series of the chart
        IChartTrendLine trendLine = chart.getSeries().get(0).getTrendLines().get(0);
        String equation = trendLine.getFormula();
        System.out.println("The equation is: " + equation);
    }
}

import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.Section;
import com.spire.doc.documents.OleObjectType;
import com.spire.doc.documents.Paragraph;
import com.spire.doc.fields.DocOleObject;
import com.spire.doc.fields.DocPicture;

public class InsertOLE {

    public static void main(String[] args) {

        //Create a Document object and load a Word document
        Document doc = new Document();
        doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\source.docx");

        //Get the last section
        Section section = doc.getLastSection();

        //Add a paragraph
        Paragraph par = section.addParagraph();

        //Load an image which will be inserted to Word document representing the embedded file
        DocPicture pdfIcon = new DocPicture(doc);
        pdfIcon.loadImage("C:\\Users\\Administrator\\Desktop\\pdf-icon.jpg");

        //Insert a PDF file to the Word document as an OLE object
        par.appendOleObject("C:\\Users\\Administrator\\Desktop\\report.pdf", pdfIcon, OleObjectType.Adobe_Acrobat_Document);

        //Save to another file
        doc.saveToFile("EmbedDocument.docx", FileFormat.Docx_2013);
    }
}

import com.spire.xls.*;

public class setMargins {
    public static void main(String[] args) {

        String outputFile="output/setMarginsOfExcel.xlsx";

        //Load the sample document from file
        Workbook workbook = new Workbook();
        workbook.loadFromFile("Sample.xlsx");

        //Get the first worksheet.
        Worksheet sheet = workbook.getWorksheets().get(0);

        //Get the PageSetup object of the first worksheet.
        PageSetup pageSetup = sheet.getPageSetup();

        //Set the page margins of bottom, left, right and top.
        pageSetup.setBottomMargin(2);
        pageSetup.setLeftMargin(1);
        pageSetup.setRightMargin(1);
        pageSetup.setTopMargin(3);
        
        //Set the margins of header and footer.
        pageSetup.setHeaderMarginInch(2);
        pageSetup.setFooterMarginInch(2);

        //Save to file.
        workbook.saveToFile(outputFile, ExcelVersion.Version2013);

    }
}