JSP生成静态Html页面
【转载】JSP生成静态Html页面
在网站项目中,为了访问速度加快,为了方便百度爬虫抓取网页的内容,需要把jsp的动态页面转为html静态页面。通常有2种常用的方式:
1.伪静态,使用URL Rewriter
2.纯静态,本文中代码实现的就是纯静态,Servlet实现。
代码:
- 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;
- /**
- * @Description: jsp生成html页面--使用
- * @author Alpha
- * @date 2015年9月17日 下午1:24:27
- * @version V1.0
- */
- public class ToHtml extends HttpServlet {
- private static final long serialVersionUID = -7294946376649752356L;
- public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- ServletContext sc = getServletContext();//为你的应用的上下文路径。
- String fileName = request.getParameter("fileName");// 你要访问的jsp
- // 则你访问这个servlet时加参数.如http://localhost/test/toHtml?fileName=index
- String url = "/" + fileName + ".jsp";// 你要生成的页面的文件名。扩展名为jsp
- String name = sc.getRealPath("/") + fileName + ".html";// 这是生成的html文件名
- 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(name); // 把jsp 输出的内容写到xxx.html
- os.writeTo(fos);
- fos.close();
- PrintWriter out = response.getWriter();
- out.print("SUCCESS");
- }
- }
web.xml 配置:
- <!-- 生成静态页面 -->
- <servlet>
- <servlet-name>jspToHtmlServlet</servlet-name>
- <servlet-class>com.alpha.servlet.ToHtml</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>jspToHtmlServlet</servlet-name>
- <url-pattern>*.2html</url-pattern>
- </servlet-mapping>
生成方法:
http://localhost:8080/test/idnex.2html?fileName=index 生成首页