JSP结合js实现img中src更新请求的方法

时间:2021-05-26

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)

<script type="text/javascript"> function changeImage(){ var img = document.getElementById("imgVcode"); if(img.name == 1){ img.name = 2; img.src = "shop.do?method=registerImage2"; }else if(img.name == 2){ img.name = 1; img.src = "shop.do?method=registerImage"; } } </script>

2.jsp中img和img改变的代码

<td> <img class="yzm_img" id='imgVcode' name="1" src="shop.do?method=registerImage" /> <input name="code" type="text" id="txtVerifyCode" class="yzm_input" onblur="testCode(this)"/> <div class="text_left t1"> <p class="t1"> <span id="vcodeValidMsg">请输入图片中的四个字母。</span> <span id="codeInfo" style="color:red"></span> <a href="#" id="imgchange" onclick="changeImage()">看不清楚?换个图片</a> </p> </div> </td>

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。

声明:本页内容来源网络,仅供用户参考;我单位不保证亦不表示资料全面及准确无误,也不保证亦不表示这些资料为最新信息,如因任何原因,本网内容或者用户因倚赖本网内容造成任何损失或损害,我单位将不会负任何法律责任。如涉及版权问题,请提交至online#300.cn邮箱联系删除。

相关文章