image.jsp

小型简单的旅馆预订系统. 客户:预定,更改,撤销,会员积分累积,查询预定,会员. 后台:会员更改,房间更改,预定更改,预定信息统计.

<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<%!
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);
        }
%>
<%

response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);


int width=60, height=20;
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));


//g.setColor(new Color());
//g.drawRect(0,0,width-1,height-1);



g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
 int x = random.nextInt(width);
 int y = random.nextInt(height);
        int xl = random.nextInt(12);
        int yl = random.nextInt(12);
 g.drawLine(x,y,x+xl,y+yl);
}


String sRand="";
for (int i=0;i<4;i++){
    String rand=String.valueOf(random.nextInt(10));
    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);
}


session.setAttribute("rand",sRand);



g.dispose();


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


%>