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Osgi series-develop Server Web application II: static Resources

Source: Internet
Author: User
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In the previous articleArticleThe osgi series-one of the Web applications for developing servers: Servlet implementation, describes how to develop servlet methods under the osgi framework. However, not all web applications only have servlets and there are many static resources, such as HTML, images, CSS, and Js, in this article, we will continue to explain how to include these static Resources in the bundle and then access them through a browser.

 

Step 1: OpenHelloworldbundleProject, inSRCThese static resources added to the directory:

Index.htmlIs a simple test page, includingImages/equinox.pngImage usage. The content of index.html is as follows:

<! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en" "http://www.w3.org/TR/html4/loose.dtd"> <HTML> Do you know that I was born in the arms of equinox?<Br/> <a href = "http://eclipse.org/equinox/">  </a> </body>  


 
 
 


 
Step 2: ModifyActivator. JavaTo register static resources with the HTTP service. The content of activator. Java is as follows:
 


 Package  Helloworldbundle;  Import  Org. osgi. Framework. bundleactivator;  Import Org. osgi. Framework. bundlecontext;  Import  Org. osgi. Framework. serviceevent;  Import  Org. osgi. Framework. servicelistener;  Import  Org. osgi. Framework. servicereference;  Import  Org. osgi. Service. http. httpservice;  Public   Class Activator Implements  Bundleactivator, servicelistener { Private  Bundlecontext CTX;  Private Servicereference  Ref;  Public   Void Start (bundlecontext context) Throws  Exception {CTX = Context; context. addservicelistener (  This , "(Objectclass =" + httpservice. Class . Getname () + ")" );} Public   Void Stop (bundlecontext context) Throws  Exception {context. removeservicelistener (  This  );}  Public   Void  Servicechanged (serviceevent event ){  Switch  (Event. GetType ()){  Case  Serviceevent. Registered: registerservlet (); Break  ;  Case  Serviceevent. unregistering: unregisterservlet ();  Break  ;}}  Private   Void  Registerservlet (){  If (Ref = Null  ) {Ref = CTX. getservicereference (httpservice. Class );  If (Ref! = Null  ){  Try  {Httpservice HTTP = CTX. getservice (REF); http. registerservlet ( "/Demo/Hello ", New Helloservlet (CTX ), Null , Null  ); System. Out. println ( "/Demo/Hello already registered"); Http. registerresources ( "/Demo/static", "static ", Null  ); System. Out. println ( "/Demo/static has been registered" );}  Catch  (Exception e) {e. printstacktrace ();}}}}  Private   Void  Unregisterservlet (){  If (Ref! = Null ){  Try  {Httpservice HTTP = CTX. getservice (REF); http. unregister ( "/Demo/hello" ); System. Out. println ( "/Demo/Hello has been uninstalled" ); Http. unregister ( "/Demo/static" ); System. Out. println ( "/Demo/static has been uninstalled" ); Ref = Null  ;} Catch  (Exception e) {e. printstacktrace ();}}}} 


 
 
 


 
Step 3: Run helloworldbundle to accessHttp: // localhost/demo/static/index.html. Er, are there any images?
 


 
 


 
 
 


 
The Eclipse project source code in this article can be downloaded through the following link:
 


 
Osgi-HelloWorldBundle2.rar

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