课程设计-电子商务平台 部分代码.doc

部分代码展示如下： 图片验证码生成代码如下(CheckCodeAciton)： public class CheckCodeAction extends Action{ public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response){ response.setContentType(image/jpeg); // 图片的内存映像 BufferedImage image=new BufferedImage(60,25,BufferedImage.TYPE_INT_RGB); // 获得画笔对象 Graphics g = image.getGraphics(); Random r = new Random(); g.setColor(new Color(r.nextInt(255),r.nextInt(255),r.nextInt(255))); g.fillRect(0, 0, 60, 25); g.setColor(new Color(0,0,0)); String str = ; for(int i=0;i4;i++){ char ch = A; str+=(char)(ch+r.nextInt(26)); } //String number = String.valueOf(r.nextInt(99999)); String number = str; HttpSession session = request.getSession(); session.setAttribute(number, number); g.drawString(number, 10, 18); for(int i=0;i2;i++){ g.setColor( new Color(r.nextInt(255), r.nextInt(255), r.nextInt(255))); g.drawLine(r.nextInt(60), r.nextInt(25), r.nextInt(60), r.nextInt(25)); } // 压缩成jpeg格式 OutputStream os; try { os = response.getOutputStream(); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(os); // 把BufferedImage对象中的图像信息编码后 // 向创建该对象(encoder)时指定的输出流输出 encoder.encode(image); } catch (Exception e) { e.printStackTrace(); } return null; } } 密码采用了加密算法，工具类代码如下： public final class DegistUtil { public static String md5(String str){ try { //将密码变成字节再加密 MessageDigest md = MessageDigest.getInstance(MD5); byte[] bys = md.digest(str.getBytes()); //将加密后的字节数组使用Base64算法变成字符 BASE64Encoder encode = new BASE64Encoder(); return encode.encode(bys); } catch (Exception e) { e.printStackTrace(); return null; } 分页技术核心代码： for(int i=0;icats.size();i++){ Category c = cats.get(i); counts+=c.getCount(); if(c.getId()==scc){ pages= c.getCount()/size; if(c.getCount() % size != 0){ pages++; } } } if(page=pages){ bookListForm.setPag