<%-- Document : img Created on : 2020-4-12, 7:49:34 Author : Administrator --%> <%@page import="javax.imageio.ImageIO"%> <%@page import="java.awt.Font"%> <%@page import="java.awt.Color"%> <%@page import="java.awt.Graphics"%> <%@page import="java.awt.image.BufferedImage"%> <%-- 通过contentType属性指定响应数据是图片 --%> <%@page contentType="image/png" language="java" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <% // 创建BufferedImage对象 BufferedImage image = new BufferedImage(340,160, BufferedImage.TYPE_INT_RGB); // 以Image对象获取Graphics对象 Graphics g = image.getGraphics(); // 使用Graphics画图，所画的图像将会出现在image对象中 g.fillRect(0, 0, 400, 400); // 设置颜色：红 g.setColor(new Color(255, 0, 0)); // 画出一段弧 g.fillArc(20, 20, 100, 100, 30, 120); // 设置颜色：绿 g.setColor(new Color(0, 255, 0)); // 画出一段弧 g.fillArc(20, 20, 100, 100, 150, 120); // 设置颜色：蓝 g.setColor(new Color(0, 0, 255)); // 画出一段弧 g.fillArc(20, 20, 100, 100, 270, 120); // 设置颜色：黑 g.setColor(new Color(0, 0, 0)); g.setFont(new Font("Arial Black", Font.PLAIN, 16)); // 画出三个字符串 g.drawString("red:climb", 200, 60); g.drawString("green:swim", 200, 100); g.drawString("blue:jump", 200, 140); g.dispose(); // 将图像输出到页面的响应 ImageIO.write(image, "png", response.getOutputStream()); %> </body> </html>
