404错误：无法调用非常简单的Rest Web服务的基本方法

Question

I try to implement at home a simple rest web service in order to learn this technology.

I use the latest version of JBoss EAP : the 7. I have created under Java 8 a Maven project. The deployment is ok but when i want to call a method of my REST Web Service, i have a 404 error.

I follow what to do on specifications and tutorial.

1) I create a WAR whose name is bddsorties In the pom, i have :

**<plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.4</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
                <warName>sortiesbdd</warName>
            </configuration>
</plugin>**

2) I have a class that extends the javax.ws.rs.core.Application class : public class App extends Application. This class is annotated : @ApplicationPath("/messorties")

@ApplicationPath("/messorties")
public class App extends Application
{
    public static void main( String[] args)
    {
        System.out.println( "Just the Main Class Here!" );
    }
}

3) I have another class, my Web Service annotated with @Path : @Path("accueil")

4) In this Web Service class called HelloWorld, there is a basic method that i want to call annotated with @Path("helloworld")

@Path("accueil")
public class HelloWorld {

    @GET
    @Path("helloworld")
    public Response getHelloWorld() {
        String value = "Hello World Thomas in REST World";
        return Response.status(200).entity(value).build();
    }
}

When i want to call this method by typing http://localhost:8080/sortiesbdd/messorties/accueil/helloworld , i have a 404 error : Error HTTP 404

What is wrong in my code ? i am looking for 2 days, and i can't find a solution. For me, all seem to be ok, but, there is a mistake that i can't find.

Thank you in advance, Thomas

PS: As i read on JBoss documentation, i have a web.xml file, but empty.

Answer 1

Expose your resource classes via App like below:

@ApplicationPath("/messorties")
public class App extends Application{

private final Set<Class<?>> classes;

public App(){

 classes = new HashSet<>();
    // add Resources
    classes.add(HelloWorld.class);
}

@Override
public Set<Class<?>> getClasses() {
    return classes;
}

}

Also declare your all @path annotations like @path("/accueil")

Answer 2

尝试这样声明您的@Path批注：@Path（“ / accueil”）和@Path（“ / helloworld”）

Answer 3

leave the war file name from the path: http://localhost:8080/messorties/accueil/helloworld

edit #1:

I just checked one of my projects I deploy on Wildfly: do you have a webapp/WEB-INF/jboss-web.xml file?

I have the context root defined there:

<?xml version="1.0" encoding="UTF-8"?>
<jboss-web version="8.0" xmlns="http://www.jboss.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.jboss.com/xml/ns/javaee http://www.jboss.org/schema/jbossas/jboss-web_8_0.xsd">
  <context-root>/sortiebdd</context-root>
</jboss-web>

check if you have this configuration defining the context root.

edit #2:

besides the jboss-web.xml I have a beans.xml in the WEB-INF directory with this content:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
       bean-discovery-mode="annotated">
</beans>

I have no web.xml, because with the beans.xml and the bean-discovery-mode set to annotated, the web.xml is not needed anymore.