jsp生成静态页面—1

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。首先应创建一个模板文件，文件名和文件后缀可以随意，但我一般常用的还是 *.template ，因此，这里就以 template.template 为例( 将模板文件放入 /WEB-INF/templates/ 文件夹下 )：下面是一个简单的示例



1.buildhtml.jsp
Jsp代码

1. <%@ page contentType="text/html; charset=gb2312" import="java.util.*,java.io.*"%>
2. <%
3. try{
4. //设置字符编码
5. request.setCharacterEncoding( "gb2312" );
6. response.setCharacterEncoding( "gb2312" );
7.
8. String title="This is Title";
9. String content="This is Content Area";
10. String editer="LaoMao";
11. String filePath = "";
12. // 获得模板文件的路径
13. filePath = request.getRealPath("/")+"test/template.htm";
14. //out.print(filePath+"<br>");
15. String templateContent="";
16. //读取模块文件
17. FileInputStream fileinputstream = new FileInputStream(filePath);
18. int lenght = fileinputstream.available();
19. byte bytes[] = new byte[lenght];
20. fileinputstream.read(bytes);
21. fileinputstream.close();
22. templateContent = new String(bytes);
23. //out.print(templateContent);
24. templateContent=templateContent.replaceAll("###title###",title);
25. templateContent=templateContent.replaceAll("###content###",content);
26. templateContent=templateContent.replaceAll("###author###",editer);//替换掉模块中相应的地方
27. //out.print(templateContent);
28. // 根据时间得文件名
29. Calendar calendar = Calendar.getInstance();
30. String fileame = String.valueOf(calendar.getTimeInMillis()) +".html";
31. //生成的html文件保存路径
32. fileame = request.getRealPath("/")+fileame;
33. //建立文件输出流
34. FileOutputStream fileoutputstream = new FileOutputStream(fileame);
35. byte tag_bytes[] = templateContent.getBytes();
36. fileoutputstream.write(tag_bytes);
37. fileoutputstream.close();
38.
39. }catch(Exception e){
40. out.print(e.toString());
41. }
42.
43.
44. %>

<%@ page contentType="text/html; charset=gb2312" import="java.util.*,java.io.*"%>
<%
try{
//设置字符编码
request.setCharacterEncoding( "gb2312" );
response.setCharacterEncoding( "gb2312" );

String title="This is Title";
String content="This is Content Area";
String editer="LaoMao";
String filePath = "";
// 获得模板文件的路径
filePath = request.getRealPath("/")+"test/template.htm";
//out.print(filePath+"<br>");
String templateContent="";
//读取模块文件
FileInputStream fileinputstream = new FileInputStream(filePath);
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";
//生成的html文件保存路径
fileame = request.getRealPath("/")+fileame;
//建立文件输出流
FileOutputStream fileoutputstream = new FileOutputStream(fileame);
byte tag_bytes[] = templateContent.getBytes();
fileoutputstream.write(tag_bytes);
fileoutputstream.close();

}catch(Exception e){
out.print(e.toString());
}


%>



2. template.template
Html代码

1. <html>
2. <head>
3. <title>###title###</title>
4. <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
5. <LINK href="../css.css" rel=stylesheet type=text/css>
6. </head>
7.
8.
9. <body>
10. <table width="500" border="0" align="center" cellpadding="0" cellspacing="2">
11. <tr>
12. <td align="center">###title###</td>
13. </tr>
14. <tr>
15. <td align="center">author：###author###  </td>
16. </tr>
17. <tr>
18. <td>###content###
19. </td>
20.
21. </tr>
22.
23. </table>
24. </body>
25. </html>

<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>

为了将应用进行国际化，可以将页面的编码设为 UTF-8