Add ValidateCodeController

ValidateCodeController

@@ -0,0 +1,95 @@
+package com.controller.before;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Random;
+import javax.imageio.ImageIO;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+/**
+ * 验证码
+ */
+@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("code", 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();
+		}
+	}
+}