@maohoo LaTex转Image

package com.hunter.latexdemo;

import org.scilab.forge.jlatexmath.TeXConstants;
import org.scilab.forge.jlatexmath.TeXFormula;
import org.scilab.forge.jlatexmath.TeXIcon;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;

/**
 * Created by MaoHoo on 2017/10/10.
 * Description :
 * Version: V1.0
 */
public class LatexRender {
    public static void main(String[] args) {
        String latex = "x=\\frac{-b \\pm \\sqrt {b^2-4ac}}{2a}";
        // create a formula
        TeXFormula formula = new TeXFormula(latex);

        // render the formla to an icon of the same size as the formula.
        TeXIcon icon = formula
                .createTeXIcon(TeXConstants.STYLE_DISPLAY, 20);

        // insert a border
        icon.setInsets(new Insets(5, 5, 5, 5));

        // now create an actual image of the rendered equation
        BufferedImage image = new BufferedImage(icon.getIconWidth(),
                icon.getIconHeight(), BufferedImage.TYPE_BYTE_GRAY);
        Graphics2D g2 = image.createGraphics();
        g2.setColor(Color.white);
        g2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
        JLabel jl = new JLabel();
        jl.setForeground(new Color(0, 0, 0));
        icon.paintIcon(jl, g2, 0, 0);
        // at this point the image is created, you could also save it with ImageIO
        saveImage(image,"gif","D:\\temp\\1.gif");
    }


    public static void saveImage(BufferedImage image, String format,
                                 String filePath) {
        try {
            ImageIO.write(image, format, new File(filePath));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}