1.编写jsp页面，计算1-100之间的所有素数之和
提示：素数：在一个大于1的自然数中，除了1和此整数自身外，不能被其他自然数整除的数
<%@ 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的素数和 <br> <% int sum = 0; int[] a = new int[100]; for (int i = 0; i < a.length; i++) { a[i] = i; } for (int i = 2; i < a.length; i++) { boolean flag = true; for (int j = 2; j < a[i]; j++) { if (a[i] % j == 0) flag = false; } if (flag) { sum += i; } } %> 1-100之间的素数和是: <%=sum%> </body> </html>
2. 编写jsp页面，计算1-100之间的所有偶数之和
<%@ 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>
