{"id":878,"date":"2015-03-25T15:25:12","date_gmt":"2015-03-25T19:25:12","guid":{"rendered":"http:\/\/shirishranjit.com\/blog1\/?page_id=878"},"modified":"2016-07-29T12:36:42","modified_gmt":"2016-07-29T16:36:42","slug":"rest-with-jersey","status":"publish","type":"page","link":"https:\/\/shirishranjit.com\/blog1\/technical-posts\/webservice-topic\/rest-with-jersey","title":{"rendered":"Step by Step example to build REST Service with JAX-RS"},"content":{"rendered":"

REST service with Java JAX-RS step by step:<\/h1>\n
    \n
  1. Include following to two mapping in your web.xml<\/li>\n
    \r\n \r\n<servlet>\r\n    <servlet-name>javax.ws.rs.core.Application<\/servlet-name>\r\n    <load-on-startup>1<\/load-on-startup>\r\n<\/servlet>\r\n\r\n<servlet-mapping>\r\n    <servlet-name>javax.ws.rs.core.Application<\/servlet-name>\r\n    <url-pattern>\/yourAppURL\/*<\/url-pattern>\r\n<\/servlet-mapping>\r\n<\/pre>\n
  2. Create a class for REST Service. The @PATH annotation must be defined at the class level not at the method level.<\/li>\n
    \r\n\/**\r\n* @author shirish\r\n* @Jul 11, 2016\r\n*\r\n*\/\r\n@Path(\"\/hello\")\r\npublic class HelloWorldClass {\r\n\r\n\/**\r\n*\r\n*\/\r\npublic HelloWorldClass() {\r\n\r\n  }\r\n\r\n@GET\r\n@Produces(\"text\/plain\")\r\npublic String getClichedMessage() {\r\n\r\n    return \"Hello World\";\r\n  }\r\n}\r\n<\/pre>\n
  3. Classpath in the war.\u00a0 –<\/li>\n
    The easiest way to get war working in a java web container is to put all application classes in \u201cyourWebApp\/WEB-INF\/classes\u201d<\/em> such that you do not need to fix your application classpath to include jars.
    \n
    \nNote: even if you put your application jars in \u201cyourWebApp\/WEB-INF\/lib\u201d<\/em>, the jars may not be in classpath properly; therefore, may not have the classes loaded that are necessary.<\/p>\n
  4. Build and Deploy in JETTY or any application server.<\/li>\n
  5. path to get to your REST service<\/li>\n
    \r\n    http:\/\/localhost:8080\/yourapp\/yourAppURL\/hello\r\n<\/pre>\n<\/ol>\n
    Reference:<\/h2>\n