package com.tszr.eBusiness.controller.before; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.awt.*; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.OutputStream; import java.util.Random; @Controller public class ValidateCodeController { private char code[] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9' }; private static final int WIDTH = 50; private static final int HEIGHT = 20; private static final int LENGTH = 4; @RequestMapping("/validateCode") public void validateCode(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub // 设置响应报头信息 response.setHeader("Pragma", "No-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); // 设置响应的MIME类型 response.setContentType("image/jpeg"); BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); Font mFont = new Font("Arial", Font.TRUETYPE_FONT, 18); Graphics g = image.getGraphics(); Random rd = new Random(); // 设置背景颜色 g.setColor(new Color(rd.nextInt(55) + 200, rd.nextInt(55) + 200, rd .nextInt(55) + 200)); g.fillRect(0, 0, WIDTH, HEIGHT); // 设置字体 g.setFont(mFont); // 画边框 g.setColor(Color.black); g.drawRect(0, 0, WIDTH - 1, HEIGHT - 1); // 随机产生的验证码 String result = ""; for (int i = 0; i < LENGTH; ++i) { result += code[rd.nextInt(code.length)]; } HttpSession se = request.getSession(); se.setAttribute("rand", result); // 画验证码 for (int i = 0; i < result.length(); i++) { g.setColor(new Color(rd.nextInt(200), rd.nextInt(200), rd .nextInt(200))); g.drawString(result.charAt(i) + "", 12 * i + 1, 16); } // 随机产生2个干扰线 for (int i = 0; i < 2; i++) { g.setColor(new Color(rd.nextInt(200), rd.nextInt(200), rd .nextInt(200))); int x1 = rd.nextInt(WIDTH); int x2 = rd.nextInt(WIDTH); int y1 = rd.nextInt(HEIGHT); int y2 = rd.nextInt(HEIGHT); g.drawLine(x1, y1, x2, y2); } // 释放图形资源 g.dispose(); try { OutputStream os = response.getOutputStream(); // 输出图像到页面 ImageIO.write(image, "JPEG", os); } catch (IOException e) { e.printStackTrace(); } } }