JSP生成静态页实践及其设计思想[2]

2019-11-18 16:39:29

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为了减轻服务器压力，将原来的文章管理系统由jsp文件的从数据库中取数据显示改为由jsp生成静态html文件后直接访问html文件。下面是一个简单的示例

1.builDHTML.jsp

<%@ page contentType="text/html; charset=gb2312" import="java.util.*,java.io.*"%>
<%
try{
String title="This is Title";
String content="This is Content Area";
String editer="LaoMao";
String filePath = "";
filePath = request.getRealPath("/")+"test/template.htm";
//out.PRint(filePath+"<br>");
String templateContent="";
FileInputStream fileinputstream = new FileInputStream(filePath);//读取模块文件
int lenght = fileinputstream.available();
byte bytes[] = new byte[lenght];
fileinputstream.read(bytes);
fileinputstream.close();
templateContent = new String(bytes);
//out.print(templateContent);
templateContent=templateContent.replaceAll("###title###",title);
templateContent=templateContent.replaceAll("###content###",content);
templateContent=templateContent.replaceAll("###author###",editer);//替换掉模块中相应的地方
//out.print(templateContent);
// 根据时间得文件名
Calendar calendar = Calendar.getInstance();
String fileame = String.valueOf(calendar.getTimeInMillis()) +".html";
fileame = request.getRealPath("/")+fileame;//生成的html文件保存路径
FileOutputStream fileoutputstream = new FileOutputStream(fileame);//建立文件输出流
byte tag_bytes[] = templateContent.getBytes();
fileoutputstream.write(tag_bytes);
fileoutputstream.close();
}
catch(Exception e){
out.print(e.toString());
}

2. template.htm

<html>
<head>
<title>###title###</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<LINK href="../CSS.css" rel=stylesheet type=text/css>
</head>

<body>
<table width="500" border="0" align="center" cellpadding="0" cellspacing="2">
<tr>
    <td align="center">###title###</td>
</tr>
<tr>
    <td align="center">author：###author###  </td>
</tr>
<tr>
    <td>###content###
</td>

</tr>

</table>
</body>
</html>

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