jsp页面静态化例子

连接：http://konglx.iteye.com/blog/632744

package com.htmlstatic;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

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"; //$NON-NLS-1$

private static ServletContext sc = null;

private HttpServletRequest request = null;
private HttpServletResponse response = null;
private static String staticHtmlRefreshTime = "1";//刷新间隔时间
private static String path = "D:\\tomcat5.5\\webapps\\diesel_gdc";//文件生成路径
private static String url = "/index.jsp";//需要静态化的页面


// 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);
}

// 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 {
response.setContentType(CONTENT_TYPE);
long SPACING = 0;
if (staticHtmlRefreshTime == null) {
SPACING = 1000 * 60 * 10;
} else {
SPACING = 1000 * 60 * Long.parseLong(staticHtmlRefreshTime);
}

sc = getServletContext();
this.request = request;
this.response = response;

String[] urls = url.split(",");

List names = new ArrayList();
for (int i = 0; i < urls.length; i++) {
String tmp = urls[i].replaceAll(".jsp", ".html");
names.add(tmp);
}
while (true) {
System.err.println("静态化开始");
myService(urls, names);
System.err.println("静态化结束");
try {
Thread.currentThread().sleep(SPACING);
} catch (Exception e) {
e.printStackTrace();
}
}
}

public synchronized void myService(String[] urls, List names) {

String name = "";
for (int i = 0; i < urls.length; i++) {
FileOutputStream fos = null;
try {
name = path + names.get(i).toString().replaceAll(".html", ".html");
RequestDispatcher rd = sc.getRequestDispatcher("/" + urls[i]);
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();
System.out.println("name=="+name);

fos = new FileOutputStream(name);
// 把jsp输出的内容写到xxx.htm
os.writeTo(fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fos.close();
} catch (Exception e) {
}
}

}
}

private void writeFile(String fileName, String content) {
OutputStreamWriter writer = null;
try {
File f = new File(path + "\\" + fileName);
if (!f.exists()) {
f.createNewFile();
}
writer = new OutputStreamWriter(new FileOutputStream(f), "GBK");
writer.write(content);
writer.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}