e代劍客——溫柔一刀

<% ??@?page?contentType? = ? " ?text/html;?charset=gb2312? " ? %> ?
? < ?html? > ?
? < ?head? > ?
? < ?meta??http - equiv? = " Content-Type " ??content? = " text/html;?charset=gb2312 " ? > ?
? < ?title? > ?用戶登錄? </ ?title? > ?
?? < ?script??language? = " javascript " ? > ??
????function??loadimage()?? {
????document.getElementById(? " ?randImage? " ?).src?? = ??? " ?image.jsp?? " ? + ?Math.random();
??} ?
??? </ ?script? > ?
? </ ?head? > ?
?
? < ?body? > ?
?
? < ?table??width? = " 256 " ??border? = " 0 " ??cellpadding? = " 0 " ??cellspacing? = " 0 " ? > ?
??? <!-- ?DWLayoutTable? --> ?
??? < ?form??action? = " validate.jsp " ??method? = " post " ??name? = " loginForm " ? > ?
??? < ?tr? > ?
????? < ?td??width? = " 118 " ??height? = " 22 " ??valign? = " middle " ??align? = " center " ? >< ?input??type? = " text " ??name? = " rand " ??size? = " 15 " ? ></ ?td? > ?
????? < ?td??width? = " 138 " ??valign? = " middle " ??align? = " center " ? >< ?img??alt? = " code " ??name? = " randImage " ??id? = " randImage " ??src? = " image.jsp " ??width? = " 60 " ??height? = " 20 " ??border? = " 1 " ??align? = " absmiddle " ? ></ ?td? > ?
??? </ ?tr? > ?
??? < ?tr? > ?
????? < ?td??height? = " 36 " ??colspan? = " 2 " ??align? = " center " ??valign? = " middle " ? >< ?a??href? = " javascript:loadimage(); " ? >< ?font?? class ? = pt95? > ?刷新? </ ?font? ></ ?a? ></ ?td? > ?
??? </ ?tr? > ?
??? < ?tr? > ?
????? < ?td??height? = " 36 " ??colspan? = " 2 " ??align? = " center " ??valign? = " middle " ? >< ?input??type? = " submit " ??name? = " login " ??value? = " 提交 " ? ></ ?td? > ?
??? </ ?tr? > ?
??? </ ?form? > ?
? </ ?table? > ?
? </ ?body? > ?
? </ ?html? > ?
?

<% ??@?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);
}
? %> ?
?? <% ??
out.clear();? // ?這句針對resin服務器，如果是tomacat可以不要這句
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(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 ?);
}

? // ??將認證碼存入SESSION
session.setAttribute(? " ?rand? " ?,sRand);

g.dispose();

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

<% ??@?page?contentType? = ? " ?text/html;?charset=gb2312? " ? %> ?
?? <% ??
?String??rand?? = ??(?String?)session.getAttribute(? " ?rand? " ?);
?String??input?? = ??request.getParameter(? " ?rand? " ?);
? if ?(rand.equals(input)) {
out.print(? " ?<script>alert('驗證通過！');</script>? " ?);
} ?? else ? {
out.print(? " ?<script>alert('請輸入正確的驗證碼！');location.href='login.jsp';</script>? " ?);
}
? %> ?