-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Gingtao,
On 1/29/13 7:45 AM, qingtao peng wrote: > I have built the apache-tomcat-7.0.32 server on my computer.My > operating system is Windows7.I place a html page named > DbApplet.html under the directory of DbServlet in the webapps of > the apache-tomcat-7.0.32 server .My DbApplet.htm code is as follow > : > > <html> <head> </head> <body> <center> <object > codebase="http://localhost:8080/DbServlet/build/classes/servlet/"; > classid = "DbApplet.class" width = "600" height = "600" name = > "DbApplet"> </object> </center> </body> </html> > > I have started the apache-tomcat-7.0.32 server.Then i type > http://localhost:8080/DbServlet/DbApplet.html in the field of the > address on the browser.I can open the page on the browser,but the > html page can not present the java Applet embedded in the page.I > have encoded the java Applet and compiled it into the class named > DbApplet.class.I place it under the directory of > DbServlet/build/classes/servlet in the directory of the webapps of > the apache-tomcat-7.0.32 server .Why can the page not present my > java Applet. The available online documentation is a bit murky these days. Oracle's own documentation[1] does not explain how to tell the browser where your code is (e.g. in a JAR file on the server). I suspect it should be done this way: <object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"> <param name="codebase" value="http://localhost:8080/DbServlet/build/classes/servlet/"; /> <param name="code" value="DbApplet.class" /> </object> You should ensure that the URL http://localhost:8080/DbServlet/build/classes/servlet/DbApplet.class actually returns something. If Tomcat refuses to serve that request, you'll get nothing. Also, Oracle says this only works with Microsoft Internet Explorer. An online HOW-TO[2] (a bit dated) says that you can still use <object> in other browsers, but the syntax is a little different: <object classid="java:fully/qualified/class/name.class" type="application/x-java-applet"> <param name="code" value="fully/qualified/class/name.class" /> [...] </object> I'm not sure why you have to specify the class name twice in there. That page also shows you how to embed Java applets in such a way that they will work in both MSIE and everywhere else. Oracle has similar documentation in their page I referenced, though using a different technique. You'll have to test in your target environment to see what actually works for you. Good luck, - -chris [1] http://download.java.net/jdk8/docs/technotes/guides/jweb/applet/using_tags.html [2] http://depth-first.com/articles/2008/02/20/demystifying-java-applets-part-1-cross-browser-standards-compliant-pure-html-deployment-using-the-object-tag/ -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEAREIAAYFAlEICO0ACgkQ9CaO5/Lv0PAa3gCcD0QN+PjtpI5gWBulGW0A2kJu 5VAAoJJ1E/7o356crfZw5h3eAS6BZTw3 =Rftp -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
