Simple Calculator
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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> simple calculator </title>
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</Head>
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<Body>
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<H1> simple calculator 09
<Hr/>
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<Form action = "result. jsp">
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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 = "div">/</option>
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</Select>
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<Input type = "text" name = "number2"/>
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<Input type = "submit" value = "computing"/>
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<Input type = "reset" value = "reset">
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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 = "http://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> simple calculator </title>
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</Head>
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<Body>
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<H1> simple calculator 10
<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 = 'div '}">
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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>
Here is an episode, under the WEB-INF folder, the lib directory must have the jstl. jar and standard. jar packages
From Zhang Dapeng's blog
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