生成圖片驗證碼代碼

public class Code extends HttpServlet{private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {//PrintWriter out=resp.getWriter();//在內存中加載一張圖片int width=60;int height=35;String suiji="";BufferedImageimg=newBufferedImage(width,height,BufferedImage.TYPE_INT_RGB);//獲得畫筆Graphics g=img.getGraphics();g.setColor(Color.BLUE);//設置畫筆的顏色g.drawRect(0, 0, width, height);//畫一個矩形邊框g.setColor(Color.PINK);g.fillRect(1, 1, width-2, height-2);g.setColor(Color.BLACK);g.setFont(new Font("宋體",Font.BOLD,15));//設置字體//產生隨機數Random rd=new Random();int x=10;//數字之間的距離for(int i=0;i<4;i++){String m=rd.nextInt(10)+"";g.drawString(m, x, 23);x+=10;suiji+=m;//將隨機數以字符串的形式相加}HttpSession session = req.getSession();session.setAttribute("suiName",suiji);//產生干擾線for(int i=0;i<8;i++){g.drawLine(rd.nextInt(width), rd.nextInt(height), rd.nextInt(width), rd.nextInt(height));}//輸出ServletOutputStream pw = resp.getOutputStream();ImageIO.write(img, "jpg", pw);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doGet(req,resp);}}

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