Servlet solves the web page cache problem, servlet web page Cache

Servlet solves the web page cache problem, servlet web page Cache

(1) Why should we prevent the page caching problem of the browser:

Therefore, pages that do not need to be cached must be non-cached;

The Code is as follows:

Package com. lc. httpTest; import java. io. IOException; import java. io. printWriter; import javax. servlet. servletException; import javax. servlet. http. httpServlet; import javax. servlet. http. httpServletRequest; import javax. servlet. http. httpServletResponse; public class CacheJiejue extends HttpServlet {public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response. setContentType ("text/html; charset = UTF-8"); // specify that the page does not cache response. setDateHeader ("Expires",-1); // response supported by the IE browser. setHeader ("Cache-Control", "no-cache"); response. setHeader ("Pragme", "no-cache");} public void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this. doGet (request, response );}}

(2) The Code is as follows:

Package com. lc. httpTest; import java. io. IOException; import java. io. printWriter; import javax. servlet. servletException; import javax. servlet. http. httpServlet; import javax. servlet. http. httpServletRequest; import javax. servlet. http. httpServletResponse; public class CacheJiejue extends HttpServlet {public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response. setContentType ("text/html; charset = UTF-8"); // specify that the page is not cached // response. setDateHeader ("Expires",-1); // supported by the IE browser // cache a certain period of time for one day's response. setDateHeader ("Expires", System. currentTimeMillis () + 3600*1000*24); // ensures compatibility with response. setHeader ("Cache-Control", "no-cache"); response. setHeader ("Pragme", "no-cache");} public void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this. doGet (request, response );}}

How to solve the Servlet cache problem?

What happened to the cache?
Output cache can be used:
${CachedFragment1 }$ {counter }$ {cachedFragment2}

How to solve the Servlet cache problem?

Add random number after url