验证码生成

src/main/java/org/sss/presentation/noui/controller/VerifyCodeCreateController.java

+package org.sss.presentation.noui.controller;
+
+import log.Log;
+import log.LogFactory;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.sss.presentation.noui.common.Constants;
+
+import javax.imageio.ImageIO;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.util.Random;
+
+@Controller
+public class VerifyCodeCreateController {
+    final static String STR = "QWERTYUPLKJHGFDSAZXCVBNMqwertyupkjhgfdsazxcvbnm1234567890";
+    private static final Log log = LogFactory.getLog(VerifyCodeCreateController.class);
+    private static final int width = 100;//验证码图片宽度
+    private static final int height = 50;//验证码图片高度
+
+    @RequestMapping("/VerifyCode")
+    public void create(HttpServletRequest request, HttpServletResponse response) {
+        drawVerifyCode(request, response);
+    }
+
+    /**
+     * 绘画验证码
+     */
+    private void drawVerifyCode(HttpServletRequest request, HttpServletResponse response) {
+        Graphics2D g=null;
+        try {
+            Random r = new Random();
+            BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+            g = bi.createGraphics();
+            g.setBackground(new Color(200, 150, 255));
+            g.fillRect(0, 0, width, height);
+            StringBuilder codes = new StringBuilder();
+            for (int i = 0; i < 4; i++) {
+                String code = STR.charAt(r.nextInt(STR.length())) + "";
+                g.setColor(new Color(r.nextInt(88), r.nextInt(188), r.nextInt(255)));
+                Font font = new Font("Times New Roman", Font.ITALIC, r.nextInt(1)*7+30);
+                g.setFont(font);
+                g.drawString(code, (i * 18) + 10, 30);
+                codes.append(code);
+            }
+            request.getSession().setAttribute(Constants.VERIFYCODE, codes.toString());
+            ImageIO.write(bi, "JPG", response.getOutputStream());
+        } catch (IOException e) {
+            log.error("绘制登陆验证码异常", e);
+        } finally {
+            if(g!=null){
+                g.dispose();
+            }
+        }
+    }
+
+}