在浏览器上实现两个整数的加法运算，利用request携带参数实现加法运算
测试代码如下：
<%@ page contentType="text/html;charset=UTF-8" errorPage="erroPage.jsp" language="java" %>
<html>
<head>
<title>加法运算</title>
</head>
<body>
<%
String o = request.getParameter("one");
Integer one = 0;
if (o != null) {
one = Integer.parseInt(o);
}
String t = request.getParameter("two");
Integer two = 0;
if (t != null) {
two = Integer.parseInt(t);
}
Integer result = one + two; %>
<form action="" name="login" method="post">
<input type="text" name="one">+<input type="text" name="two"><br>
=<input type="text" name="result" value="<%= result%>" ><br>
<input type="submit" value="结果">
<input type="submit" value="取消">
</form>
</body>
</html>
