jsp---简单的计算器
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2022-06-23 16:26:10
简单的计算器
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<%@page language="java" contenttype="text/html;charset=gb2312&qu...
简单的计算器
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<%@page language="java" contenttype="text/html;charset=gb2312"%>
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<!doctype html>
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<html>
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<head>
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<title>简单计算器</title>
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</head>
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<body>
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<h1>简单计算器</h1>
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<hr />
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<form action="result.">
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<input type="text" name="number1"/>
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<select name="ope">
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<option value="add">+</option>
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<option value="minus">-</option>
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<option value="multiply">*</option>
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<option value="p">/</option>
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</select>
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<input type="text" name="number2"/>
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<input type="submit" value="计算" />
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<input type="reset" value="重置">
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</form>
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</body>
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</html>
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<%@page language="java" contenttype="text/html;charset=gb2312"%>
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<%@ taglib uri="https://java.sun.com/jsp/jstl/core" prefix="c" %>
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<!doctype html>
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<html>
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<head>
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<title>简单计算器</title>
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</head>
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<body>
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<h1>简单计算器</h1>
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<hr />
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<c:if test="${param.ope == 'add'}">
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${param.number1} + ${param.number2} = ${param.number1 + param.number2}
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</c:if>
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<c:if test="${param.ope == 'minus'}">
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${param.number1} - ${param.number2} = ${param.number1 - param.number2}
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</c:if>
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<c:if test="${param.ope == 'multiply'}">
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${param.number1} * ${param.number2} = ${param.number1 * param.number2}
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</c:if>
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<c:if test="${param.ope == 'p'}">
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${param.number1} / ${param.number2} = ${param.number1 / param.number2}
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</c:if>
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</body>
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</html>
这里有个小插曲，就是在web-inf文件夹下面，在lib的目录中必须有jstl.jar和standard.jar这两个jar包
摘自 张大鹏的博客
01
<%@page language="java" contenttype="text/html;charset=gb2312"%>
02
<!doctype html>
03
<html>
04
<head>
05
<title>简单计算器</title>
06
</head>
07
<body>
08
<h1>简单计算器</h1>
09
<hr />
10
<form action="result.">
11
<input type="text" name="number1"/>
12
<select name="ope">
13
<option value="add">+</option>
14
<option value="minus">-</option>
15
<option value="multiply">*</option>
16
<option value="p">/</option>
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</select>
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<input type="text" name="number2"/>
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<input type="submit" value="计算" />
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<input type="reset" value="重置">
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</form>
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</body>
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</html>
01
<%@page language="java" contenttype="text/html;charset=gb2312"%>
02
<%@ taglib uri="https://java.sun.com/jsp/jstl/core" prefix="c" %>
03
<!doctype html>
04
<html>
05
<head>
06
<title>简单计算器</title>
07
</head>
08
<body>
09
<h1>简单计算器</h1>
10
<hr />
11
<c:if test="${param.ope == 'add'}">
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${param.number1} + ${param.number2} = ${param.number1 + param.number2}
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</c:if>
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<c:if test="${param.ope == 'minus'}">
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${param.number1} - ${param.number2} = ${param.number1 - param.number2}
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</c:if>
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<c:if test="${param.ope == 'multiply'}">
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${param.number1} * ${param.number2} = ${param.number1 * param.number2}
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</c:if>
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<c:if test="${param.ope == 'p'}">
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${param.number1} / ${param.number2} = ${param.number1 / param.number2}
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</c:if>
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</body>
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</html>
这里有个小插曲，就是在web-inf文件夹下面，在lib的目录中必须有jstl.jar和standard.jar这两个jar包
摘自 张大鹏的博客