jsp頁面：

             <tr>
                <th width="320" >驗證碼：</th>
                 <td width="741" >
                  <s:textfield key="registerInfoBean.checkNumber" cssClass="inputtext" data-rule-required="true" />
                 <img id="chkNumber" src="registerChkNumber.action" />
                </td>
              </tr>
 

js:

   //驗證碼
    $("#chkNumber").click(function(){
        var timenow = new Date().getTime();  
        $(this).attr("src", "registerChkNumber.action?d="+timenow);
        
        
    });

        <action name="registerChkNumber" class="registerAction" method="getChkNumber">
           <result type="stream">  
                <param name="contentType">image/jpeg</param>  
                <param name="inputtName">inputStream</param>  
            </result>

      </action>
 

Action處理:

   //輸出流
      private ByteArrayInputStream inputStream;
        /**
          * 驗證碼獲取
          *
          */      
      public String getChkNumber(){          
            this.setInputStream(this.registerService.getChkNumber());
            return SUCCESS;  
         }

Service實現類方法：

    /**
     * 獲取驗證碼
     */
    public ByteArrayInputStream  getChkNumber(){
         int width = 85, height = 25;  
            BufferedImage image = new  BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
            Graphics g = image.getGraphics();  
            Random random = new Random();  
            g.setColor(getRandColor(200, 255));  
            g.fillRect(0, 0, width, height);  
              
            g.setFont(new Font("Times New Roman", Font.PLAIN, 18));  
            g.setColor(getRandColor(160, 200));  
            for(int i = 0; i < 155; i++)  
            {  
                int x1 = random.nextInt(width);  
                int y1 = random.nextInt(height);  
                int x2 = random.nextInt(12);  
                int y2 = random.nextInt(12);  
                g.drawLine(x1, y1, x2, y2);  
            }  
              
            String sRand = "";  
            for(int i = 0; i < 6; i++)  
            {  
                String rand = getRandomChar();  
                sRand += rand;  
                g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));  
                g.drawString(rand, 13*i+6, 16);  
            }
            //存進session,用於驗證  
            ActionContext.getContext().getSession().put("randomImg", sRand.toLowerCase());
            g.dispose();  
            ByteArrayOutputStream output = new ByteArrayOutputStream();  
            ImageOutputStream imageOut;
            try {
                imageOut = ImageIO.createImageOutputStream(output);
                ImageIO.write(image, "JPEG", imageOut);  
                imageOut.close();
            } catch (IOException e) {
                e.printStackTrace();
            }  
            ByteArrayInputStream input = new ByteArrayInputStream(output.toByteArray());
            return input;
      }
    
    //顏色
    public Color getRandColor(int fc, int bc){
        Random random = new Random();  
        if(fc > 255) fc = 255;  
        if(bc > 255) bc = 255;  
        int r = fc + random.nextInt(bc - fc);  
        int g = fc + random.nextInt(bc - fc);  
        int b = fc + random.nextInt(bc - fc);  
        return new Color(r, g, b);
    }
    
    //產生隨機數
    public String getRandomChar(){
        int rand = (int)Math.round(Math.random() * 2);  
        long itmp = 0;  
        char ctmp = '\u0000';  
        switch (rand)  
        {  
             case 1:  
                  itmp = Math.round(Math.random() * 25 + 65);  
                  ctmp = (char)itmp;  
                  return String.valueOf(ctmp);  
             case 2:  
                  itmp = Math.round(Math.random() * 25 + 97);  
                  ctmp = (char)itmp;  
                  return String.valueOf(ctmp);  
             default :  
                  itmp = Math.round(Math.random() * 9);  
                
        }  
        return String.valueOf(itmp);  
    }
 

驗證提交驗證碼是否正確

        //判斷驗證碼是否正確
        if(registerInfo.getCheckNumber().toLowerCase().equals(
                ActionContext.getContext().getSession().get("randomImg"))){

             //   正確後的業務處理程式碼

}