jsp实现简易计算器

输入两个数实现加减乘除，结果输出到页面上

简易的jsp代码，有两个输入框，四个提交按钮

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    



    number1:

    number2:

    
    
    
    

嵌套在jsp中的java代码，接收两个输入值，通过判断运算符进行相应运算，注意除数不为零的情况通过<%=%>输出嵌套在jsp中的java值

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    



    number1:

    number2:

    
    
    
    


<%
    String number1=request.getParameter("number1");
    int n1= Integer.parseInt(number1);
    String number2=request.getParameter("number2");
    int n2=Integer.parseInt(number2);
    String in=request.getParameter("in");
    String result="";
    if("+".equals(in)){
        result= String.valueOf(n1+n2);
    }
    if("-".equals(in)){
        result= String.valueOf(n1-n2);
    }
    if("*".equals(in)){
        result= String.valueOf(n1*n2);
    }
    if("/".equals(in)){
        if("0".equals(number2)){
            result="除数不能为零";
        }else {
            result= String.valueOf(n1/n2);
        }
    }
%>
结果:<%=n1%> <%=in%> <%=n2%> = <%=result%>