Java insert math equation to Word document

Spire.Doc supports to add Latex math code and MathML Code to Word document in Java. This article will show you how to add Latex Math equation to word document in Java applications.

Installing Spire.doc.jar

If you create a Maven project, you can easily import the jar in your application using the following configurations. For non-Maven projects, download the jar file from this link and manually add it as a dependency in your application.

<repositories>
        <repository>
            <id>com.e-iceblue</id>
            <name>e-iceblue</name>
            <url>http://repo.e-iceblue.com/nexus/content/groups/public/</url>
        </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId> e-iceblue </groupId>
        <artifactId>spire.doc</artifactId>
        <version>4.5.1</version>
    </dependency>
</dependencies>

Spire.Doc for java offers officeMath.fromLatexMathCode() method and officeMath.fromMathMLCode() method to insert math equation to word document. Use the following to insert the math equation to the Word document.

import com.spire.doc.*;
import com.spire.doc.documents.*;
import com.spire.doc.fields.omath.*;

public class Test {
    public static void main(String[] args){
        String[] latexMathCode = {
                "x^{2}+\\sqrt{{x^{2}+1}}+1",
                "2\\alpha - \\sin y + x",
                "1 \\over 2 + x",
                "(1 + \\vert x-[a-b] \\vert)",
                "\\mbox{if $x=1$ or $x=2$}",
                "\\begin{cases} 1 & \\mbox{if $x>0$,} \\\\ 2 & \\mbox{otherwise.} \\end{cases}"
        };

        String[] mathMLCode = {
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:msup><mml:mrow><mml:mi>x</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>+</mml:mo><mml:msqrt><mml:msup><mml:mrow><mml:mi>x</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:msqrt><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:math>",
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:mn>2</mml:mn><mml:mi>α</mml:mi><mml:mo>-</mml:mo><mml:mi>s</mml:mi><mml:mi>i</mml:mi><mml:mi>n</mml:mi><mml:mi>y</mml:mi><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:math>",
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:mfrac><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:mfrac></mml:math>",
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:mfenced><mml:mrow><mml:mn>1</mml:mn><mml:mo>+</mml:mo><mml:mo>|</mml:mo><mml:mi>x</mml:mi><mml:mo>-</mml:mo><mml:mfenced open=\"[\" close=\"]\"><mml:mrow><mml:mi>a</mml:mi><mml:mo>-</mml:mo><mml:mi>b</mml:mi></mml:mrow></mml:mfenced><mml:mo>|</mml:mo></mml:mrow></mml:mfenced></mml:math>",
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:mi>i</mml:mi><mml:mi>f</mml:mi><mml:mi> </mml:mi><mml:mi>x</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mi> </mml:mi><mml:mi>o</mml:mi><mml:mi>r</mml:mi><mml:mi> </mml:mi><mml:mi>x</mml:mi><mml:mo>=</mml:mo><mml:mn>2</mml:mn></mml:math>",
                "<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\"><mml:mfenced open=\"{\" close=\"\"><mml:mrow><mml:mtable><mml:mtr><mml:mtd><mml:mn>1</mml:mn></mml:mtd><mml:mtd><mml:mi>i</mml:mi><mml:mi>f</mml:mi><mml:mi> </mml:mi><mml:mi>x</mml:mi><mml:mo>&gt;</mml:mo><mml:mn>0</mml:mn><mml:mo>,</mml:mo></mml:mtd></mml:mtr><mml:mtr><mml:mtd><mml:mn>2</mml:mn></mml:mtd><mml:mtd><mml:mi>o</mml:mi><mml:mi>t</mml:mi><mml:mi>h</mml:mi><mml:mi>e</mml:mi><mml:mi>r</mml:mi><mml:mi>w</mml:mi><mml:mi>i</mml:mi><mml:mi>s</mml:mi><mml:mi>e</mml:mi><mml:mo>.</mml:mo></mml:mtd></mml:mtr></mml:mtable></mml:mrow></mml:mfenced></mml:math>"
        };

        Document doc = new Document();
        doc.loadFromFile("addMathEquation.docx");
        Section section = doc.getSections().get(0);

        Paragraph paragraph = null;
        OfficeMath officeMath;

        //Add LaTeX code
        Table table1 = section.getTables().get(0);
        for (int i = 0; i < latexMathCode.length; i++) {
            paragraph = table1.getRows().get(i + 1).getCells().get(0).addParagraph();
            paragraph.setText(latexMathCode[i]);
            paragraph = table1.getRows().get(i + 1).getCells().get(1).addParagraph();
            officeMath = new OfficeMath(doc);
            officeMath.fromLatexMathCode(latexMathCode[i]);
            paragraph.getItems().add(officeMath);
        }

        //Add MathML code
        Table table2 = section.getTables().get(1);
        for (int i = 0; i < mathMLCode.length; i++) {
            paragraph = table2.getRows().get(i + 1).getCells().get(0).addParagraph();
            paragraph.setText(mathMLCode[i]);
            paragraph = table2.getRows().get(i + 1).getCells().get(1).addParagraph();
            officeMath = new OfficeMath(doc);
            officeMath.fromMathMLCode(mathMLCode[i]);
            paragraph.getItems().add(officeMath);
        }

        //Save the document
        String result = "output/addMathEquation.docx";
        doc.saveToFile(result, FileFormat.Docx_2013);
    }
}

After run the application, we will get a word document with math equation as below: