Dynamic JSP page to generate static HTML, dynamic jsp static html

Dynamic JSP page to generate static HTML, dynamic jsp static html

This example describes how to generate static HTML on a dynamic JSP page. Share it with you for your reference. The details are as follows:

Specific implementation:

Use the Filter function to set * filters. If the corresponding. html file exists, the corresponding. html file can be directly copied.
 
Code:

JspFilter. java:

Import java. io. bufferedReader; import java. io. file; import java. io. fileOutputStream; import java. io. IOException; import java. io. inputStream; import java. io. inputStreamReader; import java.net. httpURLConnection; import java.net. URL; import javax. servlet. filter; import javax. servlet. filterChain; import javax. servlet. filterConfig; import javax. servlet. servletException; import javax. servlet. servletRequest; import ja Vax. servlet. servletResponse; import javax. servlet. http. httpServletRequest; import javax. servlet. http. httpServletResponse; public class JspFilter implements Filter {public void destroy () {// TODO Automatic Generation Method stub} public void doFilter (ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, servletException {HttpServletRequest hreq = (HttpServletRequest) request; HttpServle TResponse hresp = (HttpServletResponse) response; String name = hreq. getRequestURL (). substring (hreq. getRequestURL (). lastIndexOf ("/") + 1, hreq. getRequestURL (). lastIndexOf (". "); if (hreq. getRequestURL (). indexOf (". jsp ")! =-1 & (null = hreq. getParameter ("type") | hreq. getParameter ("type "). equals ("") {hresp. sendRedirect (hreq. getContextPath () + "/conversion? Name = "+ hreq. getRequestURL (); return;} chain. doFilter (request, response);} public void init (FilterConfig arg0) throws ServletException {// TODO automatically generate method stubs }}

ConversionServlet. java:

Import java. io. bufferedReader; import java. io. file; import java. io. fileOutputStream; import java. io. IOException; import java. io. inputStream; import java. io. inputStreamReader; import java. io. printWriter; import java.net. httpURLConnection; import java.net. URL; import javax. servlet. servletException; import javax. servlet. http. httpServlet; import javax. servlet. http. httpServletRequest; import javax. servlet. http. http ServletResponse; public class ConversionServlet extends HttpServlet {public ConversionServlet () {super ();} public void destroy () {super. destroy (); // Just puts "destroy" string in log // Put your code here} public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response. setContentType ("text/html"); PrintWriter out = response. getWrite R (); // ---- obtain the request URL String reqTarget = request. getParameter ("name"); // ---- specify the HTML name of the corresponding JSP String name = reqTarget. substring (reqTarget. lastIndexOf ("/") + 1, reqTarget. lastIndexOf (". "); // --- determine whether the corresponding HTML File exists. file = new File (request. getRealPath ("/") + name + ". html "); if (! File. exists () {// -------- if the corresponding HTML file does not exist try {file. createNewFile (); // -------- create an HTML file // ------- write JSP content into the corresponding HTML file InputStream in; StringBuffer sb = new StringBuffer (""); // ---- note that you cannot directly access the requested URL here. If you access the URL directly, it will be stuck in an endless loop url = new java.net. URL (reqTarget. toString () + "? Type = 11 "); HttpURLConnection connection = (HttpURLConnection) url. openConnection (); connection. setRequestProperty ("User-Agent", "Mozilla/4.0"); connection. connect (); in = connection. getInputStream (); java. io. bufferedReader breader = new BufferedReader (new InputStreamReader (in, "GBK"); String currentLine; FileOutputStream fos = new FileOutputStream (file); while (currentLine = breader. readLine ())! = Null) {sb. append (currentLine); fos. write (currentLine. getBytes ();} if (null! = Breader) breader. close (); if (null! = Fos) fos. close (); // --------------- go to the HTML page response corresponding to JSP. sendRedirect (request. getContextPath () + "/" + name + ". html ");} catch (Exception e) {e. printStackTrace () ;}} else {// ---------- if a specified HTML exists, Jump directly to the specified HTML page response. sendRedirect (request. getContextPath () + "/" + name + ". html ") ;}} public void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet (request, response);} public void init () throws ServletException {// Put your code here }}

WEB. XML configuration:

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4"  xmlns="http://java.sun.com/xml/ns/j2ee"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee  http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <filter>  <filter-name>jspfilter</filter-name>  <filter-class>com.beanutil.JspFilter</filter-class> </filter> <filter-mapping>  <filter-name>jspfilter</filter-name>  <url-pattern>*.jsp</url-pattern> </filter-mapping> <servlet>  <servlet-name>conversion</servlet-name>  <servlet-class>com.beanutil.ConversionServlet </servlet-class> </servlet> <servlet-mapping>  <servlet-name>conversion</servlet-name>  <url-pattern>/conversion</url-pattern> </servlet-mapping></web-app>

I hope this article will help you with JSP program design.