Jersey Spider Web Service Hi Basis Example Inward Java

After Restlet, Jersey is unopen to other pop opened upwards source framework to do RESTful spider web services inward Java. Bailiwick of Jersey conforms JAX-RS specification together with genuinely it is the reference implementation of JAX-RS (JSR 311)(https://noobsjava.blogspot.com//search?q=restlet-helloworld-example-in-java-and-Eclipse">Restlet HelloWorld Example together with today we'll run into the Jersey HelloWorld Example. Typically, when a developer thinks of creating a RESTful spider web service using Java, they assume that using a Java EE application server is the solely agency to do this type of application. However, at that spot are simpler, lightweight option methods for creating RESTful applications available using Java SE. This tutorial demonstrates 1 such option using the Grizzly Web server along amongst the Bailiwick of Jersey REST framework. Grizzly's master copy utilization instance is the spider web server element for the GlassFish application server.

Jersey HelloWorld Example

Here is the unproblematic RESTful Web Service do using Bailiwick of Jersey REST framework. This service returns a message when a GET asking is sent to the "/hello" URL. If the asking also contains a asking parameter thus it is used inward the response message.

import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam;  @Path(value = "/hello") public class JerseyHelloWorldRESTService {  @GET @Path(value="/{param}") public String hello(@PathParam(value = "param") String name){  return "Hello " + mention + ", Welcome to Jersy basis of RESTful spider web service"; }  }

Error

Starting jersey grizzly ...
Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.PackagesResourceConfig init
INFO: Scanning for beginning resources together with provider classes inward the packages:

Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.ScanningResourceConfig logClasses
INFO: Root resources classes found:
shape JerseyHelloWorldRESTService
Jun 01, 2016 3:57:19 PM com.sun.jersey.api.core.ScanningResourceConfig init
INFO: No provider classes found.
Exception inward thread "main" java.lang.IllegalArgumentException: No container provider supports the type shape org.glassfish.grizzly.http.server.HttpHandler
at com.sun.jersey.api.container.ContainerFactory.createContainer(ContainerFactory.java:196)
at com.sun.jersey.api.container.ContainerFactory.createContainer(ContainerFactory.java:134)
at com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory.createHttpServer(GrizzlyServerFactory.java:242)
at JerseyServer.startServer(JerseyServer.java:24)
at JerseyServer.main(JerseyServer.java:28)

If y'all acquire the higher upwards mistake thus y'all tin add together next maven dependency (org.glassfish.jersey.containers jersey-container-jdk-http ) to solve the problem:com.sun.net.httpserver.HttpHandler"):

    <dependency>         <groupId>org.glassfish.jersey.containers</groupId>         <artifactId>jersey-container-jdk-http</artifactId>         <version>2.18</version>     </dependency> 

You could alter the version according to your environment. Remember the exception's mistake message says "No container provider supports the type interface". This dependency provides the container needed to run the Jersey.

Beware of divergence betwixt Bailiwick of Jersey together with Jersey2

It's rattling tardily to confuse amongst 2 unlike version of Jersey, inward the outset version the classes belongs to com.sun.jersey together with inward instant the framework classes goes to org.glassfish.jersey. Essentially solely the parcel is unlike precisely amongst diverse subject JAR, it's rattling tardily that JARs from Bailiwick of Jersey 1.x mixed amongst JARs from Jersey2.x together with raising dreaded NoClassDefFoundError together with it's unopen cousin ClassNotFoundException.

The parcel mention changed because Bailiwick of Jersey squad is immediately role of Glassfish. The version below 2 was using com.sun.jersey parcel precisely immediately since the society is unlike they are using org.glassfish.jersey. And Yes, at that spot are unopen to to a greater extent than differences inward code betwixt version 1.x together with 2.x. Key takeaway doesn't mix classes together with JARS from Bailiwick of Jersey 1.x amongst Bailiwick of Jersey 2.x, run into here for to a greater extent than details on the error.



That's all most Jersey Hello basis example.  Jersey framework is to a greater extent than than the JAX-RS Reference Implementation. Bailiwick of Jersey provides its ain API that extends the JAX-RS toolkit amongst additional features together with utilities to farther simplify RESTful service together with customer development. Bailiwick of Jersey also exposes numerous extension SPIs thus that developers may extend Bailiwick of Jersey to best suit their needs.

Further Learning
REST Java Web Services
REST API Design, Development & Management
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Top 10 REST Web Service Interview Questions (answer)

Spring HelloWorld Example using Dependency Injection (tutorial)

The divergence betwixt PUT vs POST inward REST Web Service? (article)

How to do JDBC connection puddle using Spring? (tutorial)

How to parse large JSON response using Jackson? (tutorial)

20 Hibernate Interview Questions for Java developers (article)

The divergence betwixt Idempotent together with prophylactic methods inward HTTP? (answer)

How to convert JSON array to String array inward Java? (tutorial)

P.S. - If y'all desire to acquire how to prepare RESTful Web Services using Spring Framework, banking enterprise tally out Eugen Paraschiv's REST amongst Spring course. He has latterly launched the certification version of the course, which is total of exercises together with examples to farther cement the existent basis concepts y'all volition acquire from the course.

Sumber https://javarevisited.blogspot.com/

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