1、配置前端页面
1 <!-- 验证码--> 2 <div class="form-group " style="padding-left: 9%;" id="show"> 3 <span class="glyphicon glyphicon-picture pull-left input-group" style="padding-top: 8px;"></span> 4 <input type="text" class="form-control col-md-7 pull-left" maxlength="4" id="user.user_code" name="user.user_code" placeholder="验证码" style="width:100px;margin-left: 2%"> 5 <img alt="" src="Code.action" src="video/Crocodile.jpg" onclick="this.src='Code.action?'+ Math.random();" class="pull-left" style="width:65px;height: 35px;margin-left: 2%;"/> 6 <small class="control-label pull-left" style="margin-top: 10px;margin-left: 5px;">(点击图片刷新)</small> 7 <label class="control-label pull-left" id="msg_code" style="color: red;margin-top: 3px;margin-left: 5px;"></label> 8 </div>
其中 src="Code.action" onclick="this.src='Code.action?'+ Math.random();",分别为action的name和每次点击图片都自动刷新一次
2、配置Action
1 <action name="Code" class="Action.LoginOrRegisterAction" method="getCheckCodePic"> 2 <result name="success" type="stream"> 3 <param name="contentType">image/jpeg</param> 4 <param name="input2">inputStream</param> 5 <param name="bufferSize">2048</param> 6 </result> 7 </action>
3、Action实例
1 //获取验码图片 2 public String getCheckCodePic() { 3 int WIDTH = 60; 4 int HEIGHT = 20; 5 HttpServletResponse response = ServletActionContext.getResponse(); 6 7 // 设置浏览器不要缓存此图片 8 response.setHeader("Pragma", "no-cache"); 9 10 response.setHeader("Cache-Control", "no-cache"); 11 12 response.setDateHeader("Expires", 0); 13 14 String str = "0123456789qwertyuiopasdfghjklzxcvbnm"; 15 16 char[] rand = new char[4]; 17 18 Random random = new Random(); 19 20 for (int i = 0; i < 4; i++) 21 { 22 rand[i] = str.charAt(random.nextInt(36)); 23 } 24 25 String rands =new String(rand); 26 27 BufferedImage image = new BufferedImage(WIDTH, HEIGHT,BufferedImage.TYPE_INT_RGB); 28 29 Graphics g = image.getGraphics(); 30 31 // 产生图像 32 // 画背景 33 g.setColor(new Color(0xDCDCDC)); 34 35 g.fillRect(0, 0, WIDTH, HEIGHT); 36 37 // 随机产生 120 个干扰点 38 39 for (int i = 0; i < 120; i++) 40 { 41 int x = (int) (Math.random() * WIDTH); 42 43 int y = (int) (Math.random() * HEIGHT); 44 45 int red = (int) (Math.random() * 255); 46 47 int green = (int) (Math.random() * 255); 48 49 int blue = (int) (Math.random() * 255); 50 51 g.setColor(new Color(red, green, blue)); 52 53 g.drawOval(x, y, 1, 0); 54 } 55 56 g.setColor(Color.BLACK); 57 58 g.setFont(new Font(null, Font.ITALIC | Font.BOLD, 18)); 59 60 // 在不同的高度上输出验证码的每个字符 61 62 g.drawString("" + rands.charAt(0), 1, 17); 63 64 g.drawString("" + rands.charAt(1), 16, 15); 65 66 g.drawString("" + rands.charAt(2), 31, 18); 67 68 g.drawString("" + rands.charAt(3), 46, 16); 69 70 System.out.println(rands); 71 72 // 结束图像 的绘制 过程, 完成图像 73 g.dispose(); 74 75 ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); 76 77 try { 78 ImageIO.write(image, "jpeg", outputStream); 79 80 ByteArrayInputStream input = new ByteArrayInputStream(outputStream.toByteArray()); 81 82 this.setInputStream(input); 83 Map<String, Object> session = ActionContext.getContext().getSession(); 84 session.put("checkCode", rands); 85 input.close(); 86 outputStream.close(); 87 } catch (IOException e) { 88 // TODO Auto-generated catch block 89 e.printStackTrace(); 90 } 91 return SUCCESS; 92 }
4、另一个Action(进行表单验证,通过获取之前保存Session的key)
1 //验证用户码是否正确 2 Map<String, Object> session1=ActionContext.getContext().getSession(); 3 if(user.getUser_code()!=null && "".equals(user.getUser_code())==false) { 4 String code=(String) session1.get("checkCode"); 5 if(code.equals(user.getUser_code())==false) { 6 //验证码错误,返回状态值 7 map2.put("LoginStatus", "303"); 8 System.out.println("验证码错误"); 9 String ReturnData=JSONObject.toJSONString(map2); //把Map集合封装成Json形式的字符串 10 inputStream=new ByteArrayInputStream(ReturnData.getBytes("UTF-8")); 11 return SUCCESS; 12 } 13 14 }