用servlet將jsp文件內容轉為html。代碼如下：
package examples;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
public class ToHtml extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
// Initialize global variables
public void init() throws ServletException {
}
// Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType(CONTENT_TYPE);
service(request, response);
/**
* 只有成功初始化後此方法才能被調用處理用戶請求。前一個參數提供訪問初始請求數據的方法和字段，
* 後一個提供servlet構造響應的方法。
*/
}
// Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
public void destroy() {
}
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
ServletContext sc = getServletContext();
String url = "/index.jsp";
String name = "index.htm"; // 這是生成的html文件名
String pName = "e:\\Tomcat 5.5\\webapps\\jspTohtml\\index.htm";
// 生成html的完整路徑
RequestDispatcher rd = sc.getRequestDispatcher(url);
final ByteArrayOutputStream os = new ByteArrayOutputStream();
final ServletOutputStream stream = new ServletOutputStream() {
public void write(byte[] data, int offset, int length) {
os.write(data, offset, length);
}
public void write(int b) throws IOException {
os.write(b);
}
};
final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os));
HttpServletResponse rep = new HttpServletResponseWrapper(response) {
public ServletOutputStream getOutputStream() {
return stream;
}
public PrintWriter getWriter() {
return pw;
}
};
rd.include(request, rep);
pw.flush();
FileOutputStream fos = new FileOutputStream(pName);
// 把jsp輸出的內容寫到指定路徑的htm文件中
os.writeTo(fos);
fos.close();
response.sendRedirect(name); // 書寫完畢後轉向htm頁面
}
}
在web.xml文件中配置：
<servlet>
<servlet-name>Tohtml</servlet-name>
<servlet-class>examples.ToHtml</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Tohtml</servlet-name>
<url-pattern>/Tohtml</url-pattern>
</servlet-mapping>
下面是用來測試的index.jsp:
<%@ page contentType="text/html; charset=gb2312" %>
<html>
<head>
<title>Cache Filter Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
簡單測試:s=
<%
int s=0;
// mock time-consuming code
for (int i=0;i<1000;i++) {
for (int j=0;j<1000;j++) {
s=s+j;
}
}
out.print(s);
%>
</body>
</html>
效果圖：
