介绍 @ controller
public class ValidateCodeController {
private 才能static final long serialVersionUID =, 1 l;
private 才能static int WIDTH =, 70,,,,,,,,,//,验证码图片的宽度
private 才能static int HEIGHT =, 35岁,,,,,,,//,验证码图片的高度
@RequestMapping才能(“/validateCode")
public 才能;void validateCode (HttpServletRequest 请求,HttpServletResponse 响应),throws ServletException, IOException {
,,,HttpSession session =, request.getSession ();
,,,response.setContentType(“图像/jpeg");
,,,ServletOutputStream sos =, response.getOutputStream ();
,,,//,设置浏览器不要缓存该图片
,,,response.setHeader (“Pragma",,“No-cache");
,,,response.setHeader (“Cache-Control",,“no-cache");
,,,response.setDateHeader (“Expires",, 0);
,,,//,创建图片缓存区
,,,BufferedImage image =, new BufferedImage(宽度、高度,祝福;BufferedImage.TYPE_INT_RGB);
,,,Graphics g =, image.getGraphics(),,,,,,,,,,,//,获取画笔
,,,char [], rands =, generateCheckCode(),,,,,,,//,产生随机的验证码
,,,//,产生图像
,,,drawBackground (g);
,,,drawRands (g,兰德);
,,,//,结束绘画过程,完成图像
,,,g.dispose ();
,,,//,将图像输出到客户端
,,,ByteArrayOutputStream bos =, new ByteArrayOutputStream ();
,,,ImageIO.write(图像,,“JPEG",, bos);
,,,byte [], buf =, bos.toByteArray ();
,,,response.setContentLength (buf.length);
,,,sos.write (buf);
,,,bos.close ();
,,,sos.close ();
,,,//,将当前验证码存入,Session 中
,,,session.setAttribute (“valicode",, new 字符串(兰德));
,,,//System.out.println (“1:“+ request.getSession () .getId ());
,,,System.out.println (session.getAttribute (“valicode"));
,,}
private 才能;void drawRands (g, Graphics char[],兰特),{
,,,g.setColor (new 颜色(41岁,41岁,41));
,,,g.setFont (new 字体(null,, Font.ITALIC | Font.BOLD,, 18));
,,,g.drawString(““, +,兰德[0],,2,,17);
,,,g.drawString(“,“, +,兰德[1],,16日,20);
,,,g.drawString(“,“, +,兰德[2],,31日,13);
,,,g.drawString(“,“, +,兰德[3],,46岁,18);
,,,//System.out.println(兰德);
,,}
private 才能;void drawBackground (Graphics g), {
,,,g.setColor (new 颜色(255,,255,,255));
,,,g.fillRect(0, 0,宽度,高度);
,,,//,随机产生,120,个干扰点
,,,(int 小姐:=,0;,小姐:& lt;, 120;,我+ +),{
,,,,,int x =, (int), (math . random(), *,宽度);
,,,,,int y =, (int), (math . random(), *,高度);
,,,,,int red =, (int), (math . random (), *, 255);
,,,,,int green =, (int), (math . random (), *, 255);
,,,,,int blue =, (int), (math . random (), *, 255);
,,,,,g.setColor (new 颜色(红色,绿色,蓝色));
,,,,,g.drawOval (x, y,, 1,, 0);
,,,}
,,}//,才能生成四个字符的验证码
private 才能;char [], generateCheckCode (), {
,,,String chars =,“0123456789 abcdefghijklmnopqrstuvwxyz";
,,,char [], rands =, new char [4];
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这篇文章主要介绍SpringMVC生成验证码图片不显示怎么办,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
近期用导弹框架写一个项目,登录模块需要生成验证码图片,我把相关的代码写好了之后传到jsp,但是图片不显示,查看控制台显示404年反复查询了一下代码并没有发现任何问题,代码如下:
