jsp第一次—

jsp第一次——3.3

1.求1-100素数和

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    1-100之间的素数和为：
    <% 
        int sum=0;
        boolean flag=true;
        for(int i=2;i<=100;i++){
            flag=true;
            for(int j=2;j<i;j++){
                if(i%j==0){
                    flag=false;
                    break;
                }
            }
            if(flag){
                sum+=i;
            }
        }
    %>
    <%=sum %>
</body>

</html>

2.求1-100偶数和

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
</head>

<body>
    求1-100的偶数和
    <br>
    <%
        int sum = 0;
        int[] a = new int[101];
        for (int i = 0; i < a.length; i++) {
            a[i] = i;
        }
        for (int i = 0; i < a.length; i++) {
            if (a[i] % 2 == 0) {
                sum += i;
            }
        }
    %>
    1-100之间的偶数和是:
    <%=sum%>
</body>
</html>