Do I really need web.xml for a Servlet based Java web application? -


i haven't been working on real world web projects. @ university used both servlets , spring java web development. in both projects given web.xml files configured , doing minor changes in them. need build web app scratch. created new servlet class in eclipse , didn't automatically create web.xml. googled, , read several resources web.xml not needed, reasoning put in couple of sentences, not sure if using annotations instead of web.xml no problem. glad if there no need configure web.xml, because haven't configured 1 myself , want focus more on business logic.

thank in advance!

you don't need web.xml file if have container supports latest j2ee specs. here link simple servlet example use annotation , here can find same spring mvc; post example here convenience

public class mywebapplicationinitializer implements webapplicationinitializer {      @override     public void onstartup(servletcontext container) {         servletregistration.dynamic registration = container.addservlet("dispatcher", new dispatcherservlet());         registration.setloadonstartup(1);         registration.addmapping("/example/*");     }  }

here link show how use other annotations available(@servletfilter, @webservletcontextlistener); can download specs form here in order more detailed view of annotations available via j2ee.


Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i...
Read more