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:


	
		jspToHtmlServlet
		com.alpha.servlet.ToHtml
	
	
		jspToHtmlServlet
		*.2html
	


生成方法:

http://localhost:8080/test/idnex.2html?fileName=index 生成首页

你可能感兴趣的:(JSP,JSP,生成静态HTML页面)