內(nèi)蒙古java團(tuán)隊(duì)

<%!

??? Color getRandColor(int cc,int bb)

??? {

??????? Random random = new Random();

??????? if(fc>255) cc=255;

??????? if(bc>255) bb=255;

??????? int r=cc+random.nextInt(bb-cc);

??????? int g=cc+random.nextInt(bb-cc);

??????? int b=cc+random.nextInt(bb-cc);

??????? returnnew Color(r,g,b);

??? } //獲取隨機(jī)顏色

%>

<%

??? response.setHeader("Pragma","No-cache");

??? response.setHeader("Cache-Control","no-cache");

??? response.setDateHeader("Expires", 0);

?

??? int width=80; //定義驗(yàn)證碼圖片的長(zhǎng)度

??? int height=30; //定義驗(yàn)證碼圖片的寬度

??? BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);

?

??? Graphics g = image.getGraphics();

?

??? Random random = new Random();

?

??? g.setColor(getRandColor(200,250));

??? g.fillRect(0, 0, width, height);

?

??? g.setFont(new Font("Times New Roman",Font.PLAIN,18));

????//定義字體形式
?

??? g.setColor(getRandColor(160,200));

??? for (int i=0;i<155;i++)

??? {

?????? int i_x = random.nextInt(width);

?????? int i_y = random.nextInt(height);

?????? int i_xl = random.nextInt(12);

?????? int i_yl = random.nextInt(12);

?????? g.drawLine(i_x,i_y,i_x+i_xl,i_y+i_yl);

??? }

??? //用線條畫背景
?

??? String s_Rand="";

??? for (int i=0;i<4;i++)

??? {

?????? String rand=String.valueOf(random.nextInt(10));

?????? s_Rand+=rand;

??????

?????? g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));

?????? g.drawString(rand,13*i+6,16);

??? }

????//產(chǎn)生4位隨機(jī)碼?
?

??? session.setAttribute("rand",s_Rand);

????//將驗(yàn)證碼存入Session中
?

??? g.dispose();

???

??? ImageIO.write(image, "JPEG", response.getOutputStream());

????//輸出驗(yàn)證圖片
???

??? out.clear();

??? out = pageContext.pushBody();

???

%>