本文实例讲述了JSP结合js实现img中src更新请求的方法。分享给大家供大家参考。具体如下：
1.javascript(更新的函数)
2.jsp中img和img改变的代码
请输入图片中的四个字母。 看不清楚？换个图片
<>
3.后台action代码
public ActionForward registerImage(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//将image创建,返回认证码
response.setContentType("image/jpeg");
OutputStream out = response.getOutputStream();
String strEnsure = shopManager.createImageInfo(50,20,out);
//设置到session中
request.getSession().setAttribute("strEnsure", strEnsure);
return null;
}
public ActionForward registerImage2(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
//将image创建,返回认证码
response.setContentType("image/jpeg");
OutputStream out = response.getOutputStream();
String strEnsure = shopManager.createImageInfo(50,20,out);
//设置到session中
request.getSession().setAttribute("strEnsure", strEnsure);
return null;
}
希望本文所述对大家的JavaScript程序设计有所帮助。
关键字词:
