JSP生成静态页实践及其设计思想[2]

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>

</head>

<body>

<tr>

<td align="center">###title###</td>

</tr>

<tr>

<td align="center">author：###author###  </td>

</tr>

<tr>

<td>###content###

</td>

</tr>

</table>

</body>

</html>