开发一个动态网页计算器JSP服务应用该服务页面能帮用户实现动态加、减、乘、除、求余计算

以下是一个简单的动态网页计算器JSP服务应用的示例：

index.jsp:

<!DOCTYPE html>
<html>
<head>
	<title>动态网页计算器</title>
</head>
<body>
	<h1>动态网页计算器</h1>
	<form action="calculate.jsp" method="post">
		<label for="num1">第一个数：</label>
		<input type="number" name="num1" id="num1" required><br>
		<label for="operator">运算符：</label>
		<select name="operator" id="operator" required>
			<option value="+">加</option>
			<option value="-">减</option>
			<option value="*">乘</option>
			<option value="/">除</option>
			<option value="%">求余</option>
		</select><br>
		<label for="num2">第二个数：</label>
		<input type="number" name="num2" id="num2" required><br>
		<input type="submit" value="计算">
	</form>
</body>
</html>

calculate.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
	<title>计算结果</title>
</head>
<body>
	<h1>计算结果</h1>
	<%
		double num1 = Double.parseDouble(request.getParameter("num1"));
		double num2 = Double.parseDouble(request.getParameter("num2"));
		String operator = request.getParameter("operator");
		double result = 0;
		switch(operator) {
			case "+":
				result = num1 + num2;
				break;
			case "-":
				result = num1 - num2;
				break;
			case "*":
				result = num1 * num2;
				break;
			case "/":
				result = num1 / num2;
				break;
			case "%":
				result = num1 % num2;
				break;
			default:
				out.println("错误的运算符");
		}
	%>
	<p><%=num1%> <%=operator%> <%=num2%> = <%=result%></p>
	<p><a href="index.jsp">返回计算器</a></p>
</body>
</html>

该应用包含两个JSP页面，index.jsp和calculate.jsp。index.jsp包含一个表单，让用户输入两个数字和运算符。calculate.jsp将从表单中获取的数字和运算符进行计算，并将结果显示在页面上

开发一个动态网页计算器JSP服务应用该服务页面能帮用户实现动态加、减、乘、除、求余计算