文章摘要
这篇文章介绍了如何在JSP中生成九九乘法表，提供了两种实现方法。第一种方法是通过自定义表达式访问（expression evaluation）实现的，第二种方法是直接在JSP内置的`out`对象中使用脚本方式调用。两种方法最终都能在页面上显示正确的九九乘法表，具体实现细节和代码示例也进行了展示。
<%@ page language=”java” import=”java.util.*” contentType=”text/html; charset=utf-8″%>
<%
String path=request.getContextPath();
String basePath=request.getScheme()+”://”+request.getServerName()+”:”+request.getServerPort()+path+”/”;
%>
<%@ page language=”java” import=”java.util.*” contentType=”text/html; charset=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=”https://www.jb51.net/article/<%=basePath%>” rel=”external nofollow” >
<title>My JSP ‘exercise.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=”https://www.jb51.net/article/styles.css” rel=”external nofollow” >
–>
</head>
<body>
<%!
//返回九九乘法表对应的HTML代码，通过表达式来调用，在页面上显示
String printMultiTable1()
{
String s=””;
for(int i=1;i<=9;i++)
{
for(int j=1;j<=i;j++)
{
s+=i+”*”+j+”=”+(i*j)+” “;
}
s+=”<br>”; //追加换行标签
}
return s;
}
//JSP内置out对象，使用脚本方式调用，打印九九乘法表
void printMultiTable2(JspWriter out) throws Exception
{
for(int i=1;i<=9;i++)
{
for(int j=1;j<=i;j++)
{
out.println(i+”*”+j+”=”+(i*j)+” “);
}
out.println(“<br>”); //追加换行标签
}
}
%>
<h1>九九乘法表</h1>
<hr>
<%=printMultiTable1()%>
<br>
<% printMultiTable2(out);%>
<br>
</body>
</html>
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