jsp页面静态化例子
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 variablespublic void init() throws ServletException {}// Process the HTTP Get requestpublic void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType(CONTENT_TYPE);service(request, response);}// Process the HTTP Post requestpublic 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.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);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.htmos.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();}}}} web.xml配置:<servlet><servlet-name>tohtml</servlet-name><servlet-class>com.htmlstatic.ToHtml</servlet-class></servlet><servlet-mapping><servlet-name>tohtml</servlet-name><url-pattern>*.tohtml</url-pattern></servlet-mapping>
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