jsp--三角形面积计算

最新推荐文章于 2023-02-16 23:07:18 发布

hotin_L

最新推荐文章于 2023-02-16 23:07:18 发布

阅读量2.9k

点赞数

CC 4.0 BY-SA版权

分类专栏： JSP

本文链接：https://blog.youkuaiyun.com/weixin_40107544/article/details/88880088

文章目录

GetArea.tag
one.jsp
运行结果

GetArea.tag

<%@ tag import="java.text.DecimalFormat" %>
<%@tag pageEncoding="UTF-8"%>
<%@attribute name="numberA" required="true"%>
<%@attribute name="numberB" required="true"%>
<%@attribute name="numberC" required="true"%>
<%@attribute name="radio" required="true"%>
<%@variable name-given="area" variable-class="java.lang.Double" scope="AT_END"%>
<%@variable name-given="df" variable-class="java.text.DecimalFormat" scope="AT_END"%>
<%@variable name-given="message"  scope="AT_END"%>
<%!
    public double getArea(double a,double b,double c) {
   
   
        if (a + b > c && a + c > b && b + c > a ) {
   
   
            double p = (a + b + c)/2.0;
            double area = Math.sqrt(p*(p-a)*(p-b)*(p