JSP全名为Java Server Pages，中文名叫java服务器页面，其根本是一个简化的Servlet设计，它是由Sun Microsystems公司倡导、许多公司参与一起建立的一种动态网页技术标准。JSP技术有点类似ASP技术，它是在传统的网页HTML（标准通用标记语言的子集）文件(*.htm,*.html)中插入Java程序段(Scriptlet)和JSP标记(tag)，从而形成JSP文件，后缀名为(*.jsp)。 用JSP开发的Web应用是跨平台的，既能在Linux下运行，也能在其他操作系统上运行。
日历表格完整代码：
<%@ 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">
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.util.*"%>
<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>
<%! int i=1;
int alldays=0;//变量alldays记录本月的天数;
%>
<%! Date date=new Date();%>
<%! SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日");
SimpleDateFormat format1=new SimpleDateFormat("MM");
SimpleDateFormat format2=new SimpleDateFormat("dd");
String str=format.format(date);//获取日期格式为:2018年03月15日;
String mm=format1.format(date);//获取 月;
String dd=format2.format(date);//获取 天;
Calendar date1=Calendar.getInstance();
int weekday=date1.get(Calendar.DAY_OF_WEEK_IN_MONTH)+1;
int firstweek=date1.get(Calendar.DAY_OF_WEEK);//获取本月第一天星期几;
int td=Integer.valueOf(dd)%7;
%>
<% if(mm.equals("01")||mm.equals("03")||mm.equals("05")||mm.equals("07")||mm.equals("08")||mm.equals("10")||mm.equals("12")){
alldays=31;
}
else if(mm.equals("02")){
alldays=29;
}
else{
alldays=30;
}
%>
<%
int flagdate=1;
int a[][]=new int[5][7];
//int j=0,k=0;
for(int j=0;j<5;j++){
for(int k=0;k<7;k++){
if(j==0&&k<firstweek-1){
a[j][k]=0;
}
else{
if(flagdate<alldays+1){
a[j][k]=flagdate;
flagdate++;
}
}
}
}
%>
<table border="1" width="30%" align="center">
<tr>
<h1 align="center"><%out.println(str); %>
</tr>
<div align="center"><button type="button"><img src="/static/imghwm/default1.png" data-src="F:\MyWorkSpace\DateJsp\WebRoot\563481.png" class="lazy" style="max-width:90%" value="上个月"/ alt="How to make jsp calendar table" ></button>
<button type="button"><img src="/static/imghwm/default1.png" data-src="F:\MyWorkSpace\DateJsp\WebRoot\563482.png" class="lazy" style="max-width:90%" value="下个月"/ alt="How to make jsp calendar table" ></button>
</div>
<br>
<tr bgcolor=#FFF68F>
<%for(i=1;i<8;i++){
%>
<td><%=i %></td>
<%
}%>
</tr>
<%
for(int j=0;j<5;j++){
%><tr><%
for(int k=0;k<7;k++){
if(a[j][k]!=0){
if(a[j][k]==Integer.valueOf(dd)){
%><td bgcolor=#FF4500><%=a[j][k] %>
</td><%
continue;
}
%><td bgcolor="#FFFFE0"><%=
a[j][k]
%>
</td><%
}
else{
%><td bgcolor="#FFFFE0"> </td><%
}
}
%></tr><%
}
%>
</table>
</body>
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