更改按钮单击JSP的背景色 [英] Change background color on button click jsp
本文介绍了更改按钮单击JSP的背景色的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我最近开始学习网络编程，我想实现一个可更改背景颜色的应用程序.我的页面上有4个按钮.我做了什么但这是行不通的.我知道，我可以使用js.但这是不对的.请帮帮我.
I recently started learning web programming and I want to implement an application that changes the background color. There are 4 buttons on my page. I did something. But It does not work. I know, that i can use js. But it will not be right. Please, help me.
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action = "apps" method="POST">
<input type="submit" name="red" value ="red" >
<input type="submit" name="blue" value ="blue" >
<input type="submit" name="green" value ="green" >
<input type="submit" name="yellow" value ="yellow" >
<input type="submit" name="reset" value ="reset" >
</form>
<%
String button1Click = request.getParameter("red");
if(button1Click.equals("red")){
<body style='background-color:#red;'>;
}
%>
</form>
</body>
</html>
推荐答案
您应该在键入html之前关闭Java scriptlet标记，并在键入html之后再次将其打开.
You should close the java scriptlet tag before typing html, and open it again after typing html.
%>
<body style='background-color: red;'>
<%
您可能要从<form>中删除action属性，因为该表单应该传递到相同的url.
And you may want to remove the action attribute from the <form> since the form should be passed to the same url.
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