如何获得HTML<输入类型＝“图像">的值.在Servlet中 [英] How to obtain value of HTML <input type="image"> in the Servlet

问题描述

我的jsp中有此代码

<div class="controls">
    <input type="image" class="sprite submit-button button" name="SubmitChangeCreds" value="ChangeUIDSubmit" src="../images/layout/transparent.png" />
</div>

在我的servlet中，我试图获取像这样的图像的值

In my servlet I am trying to get the value of this image like this

request.getParameter("SubmitChangeCreds")

但这是空的.

我们将不胜感激.

推荐答案

根据HTML规范，input type="image"将用作图像映射.当最终用户单击图像映射时，Web浏览器会将鼠标指针的x和y位置发送到服务器.提交的值可用作originalname.x和originalname.y.

As per the HTML specification, the input type="image" is to be used as an image map. The webbrowser will send the x and y position of the mouse pointer to the server when the enduser clicks on the image map. The submitted value is available as originalname.x and originalname.y.

所以在您的情况下:

String x = request.getParameter("SubmitChangeCreds.x");
String y = request.getParameter("SubmitChangeCreds.y");

---

但是，毕竟您似乎在滥用input type="image"，因为您似乎对鼠标的位置不感兴趣.我建议只使用input type="submit"，其中将图像指定为CSS背景图像.

---

However, you seem after all to be abusing the input type="image" since you don't seem to be interested in the mouse position. I'd suggest to just use input type="submit" wherein the image is specified as a CSS background image.

例如

<input type="submit" class="sprite submit-button button" name="SubmitChangeCreds" value="ChangeUIDSubmit" />

带有例如

.submit-button {
    background-image: url('../images/layout/transparent.png');
}

这是按钮中背景图片的更正确用法.

That's a more correct usage of background images in buttons.

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