jsp图片加水印

<%@ page import="java.awt.*, java.awt.image.*, javax.imageio.*, java.io.*" %>
<%
    // 原始图片路径
    String imagePath = application.getRealPath("/images/original.jpg");
    // 输出图片路径
    String outputPath = application.getRealPath("/images/watermarked.jpg");

    // 读取原始图片
    BufferedImage originalImage = ImageIO.read(new File(imagePath));

    // 创建Graphics2D对象
    Graphics2D g2d = (Graphics2D) originalImage.getGraphics();

    // 设置水印文字
    String watermarkText = "Sample Watermark";
    Font font = new Font("Arial", Font.BOLD, 36);
    g2d.setFont(font);
    g2d.setColor(Color.RED);

    // 计算水印位置
    FontMetrics fm = g2d.getFontMetrics();
    int x = originalImage.getWidth() - fm.stringWidth(watermarkText) - 10;
    int y = fm.getHeight();

    // 添加水印
    g2d.drawString(watermarkText, x, y);

    // 释放资源
    g2d.dispose();

    // 保存带水印的图片
    ImageIO.write(originalImage, "jpg", new File(outputPath));

    // 输出图片路径供前端显示
    out.println("<img src='/images/watermarked.jpg' alt='Watermarked Image'>");
%>