首页jsp javabean实现计算圆周长及面积代码

jsp javabean实现计算圆周长及面积代码

时间: 2024-10-19 12:06:21 浏览: 37

在JSP和JavaBean中实现计算圆周长和面积的代码通常会包含以下几个步骤： 1. **创建JavaBean**： ```java // Circle.java (CircleBean) public class CircleBean { private double radius; // 半径 // getter and setter methods for radius public double getRadius() { return radius; } public void setRadius(double radius) { this.radius = radius; } // Methods to calculate circumference and area public double getCircumference() { return Math.PI * radius; } public double getArea() { return Math.PI * Math.pow(radius, 2); } } ``` 2. **配置jsp页面**： ```jsp  <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Circle Calculator</title> </head> <body> <form action="calculate.jsp" method="post"> <label for="radius">Enter Radius:</label> <input type="number" id="radius" name="radius"> <br><br> <input type="submit" value="Calculate"> </form> </body> </html> ``` 3. **处理请求的JavaBean**： ```java // calculate.jsp (Servlet or JSP file) <%@ page import="CircleBean" %> <%@ page import="java.util.*" %> <% CircleBean circleBean = new CircleBean(); double radius = Double.parseDouble(request.getParameter("radius")); circleBean.setRadius(radius); double circumference = circleBean.getCircumference(); double area = circleBean.getArea(); out.println("Circumference: " + circumference); out.println("Area: " + area); %> ``` 在这个例子中，用户在`circle.jsp`表单中输入半径值，然后提交到`calculate.jsp`，`calculate.jsp`通过`CircleBean`实例来计算并显示圆的周长和面积。

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