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;web.xml 配置:
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");
}
}
<!-- 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