Cześć. Tworzę banalną usługę internetową która ma na celu zwrócenie prostego obiektu Alien składającego się z nazwy (String) i punktów (int), a moje pytanie brzmi, dlaczego po wpisaniu adresu http://localhost:8080/demorest/webapi/aliens ciągle otrzymuję komunikat w konsoli:
"MessageBodyWriter not found for media type=application/xml"...
piszę kod z odcinka https://www.youtube.com/watch?v=BZi44GOD8kY&t=929s
u niego działa, u mnie nie.
oto kod:
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>jersey-quickstart-webapp</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>jersey-quickstart-webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- Jersey dependencies -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>3.1.5</version>
</dependency>
<!-- JAXB for XML binding -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.3.4</version>
</dependency>
</dependencies>
<build>
<finalName>jersey-quickstart-webapp</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.4.0</version>
</plugin>
</plugins>
</build>
</project>
package com.telusko.demorest;
import java.util.Arrays;
import java.util.List;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;
@Path("aliens")
public class AlienResource {
@GET
@Produces(MediaType.APPLICATION_XML)
public List<Alien> getAlien() {
System.out.println("getAlien called...");
Alien a1 = new Alien();
a1.setName("Wojo");
a1.setPoints(60);
Alien a2 = new Alien();
a2.setName("Dojo");
a2.setPoints(30);
List<Alien> aliens = Arrays.asList(a1,a2);
return aliens;
}
}
package com.telusko.demorest;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Alien {
String name;
int points;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPoints() {
return points;
}
public void setPoints(int points) {
this.points = points;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd http://xmlns.jcp.org/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="5.0">
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.telusko.demorest</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webapi/*</url-pattern>
</servlet-mapping>
</web-app>