package com.ruoyi.common.utils;
|
|
import org.springframework.core.io.ClassPathResource;
|
|
import javax.imageio.ImageIO;
|
import java.awt.*;
|
import java.awt.font.FontRenderContext;
|
import java.awt.geom.Rectangle2D;
|
import java.awt.image.BufferedImage;
|
import java.io.*;
|
|
/**
|
* @Author zhuo
|
* @Date 2025/5/7
|
*/
|
public class SignatureImageUtil {
|
|
/**
|
* 根据中文导出签名图片
|
* @param text
|
* @return
|
* @throws IOException
|
* @throws FontFormatException
|
*/
|
public static InputStream saveImageToFile(String text){
|
// 获取字体库
|
Font font = null;
|
try (InputStream is = new ClassPathResource("/ttf/signature.ttf").getInputStream()) {
|
font = Font.createFont(Font.TRUETYPE_FONT, is).deriveFont(50f);
|
} catch (FontFormatException | IOException e) {
|
throw new RuntimeException(e);
|
}
|
|
int width = 100; // 图片的宽度
|
int height = 50; // 图片的高度
|
|
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
|
Graphics2D g2d = image.createGraphics();
|
|
g2d.setFont(font);
|
|
// 设置文字颜色为黑色
|
g2d.setColor(Color.black);
|
|
// 设置文字在图片中的位置
|
FontRenderContext context = g2d.getFontRenderContext();
|
Rectangle2D bounds = font.getStringBounds(text, context);
|
double x = (width - bounds.getWidth()) / 2;
|
double y = (height - bounds.getHeight()) / 2;
|
double ascent = -bounds.getY();
|
double baseY = y + ascent;
|
g2d.drawString(text, (int) x, (int) baseY);
|
g2d.dispose();
|
|
ByteArrayOutputStream os = new ByteArrayOutputStream();
|
|
try {
|
ImageIO.write(image, "png", os);
|
} catch (IOException e) {
|
throw new RuntimeException(e);
|
}
|
|
return new ByteArrayInputStream(os.toByteArray());
|
}
|
|
}
|
