带有Grizzly的泽西：找不到media type=application/json的MessageBodyWriter

Question

mvn archetype:generate -DarchetypeArtifactId=jersey-quickstart-grizzly2 -DarchetypeGroupId=org.glassfish.jersey.archetype

<dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-moxy</artifactId>
</dependency>

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Person {

  private String firstName;
  private String lastName;

  public Person(String firstName, String lastName) {
      this.firstName = firstName;
      this.lastName = lastName;
  }

  public String getFirstName() {
      return firstName;
  }

  public void setFirstName(String firstName) {
      this.firstName = firstName;
  }

  public String getLastName() {
      return lastName;
  }

  public void setLastName(String lastName) {
      this.lastName = lastName;
  }
}

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("myresource")
public class MyResource {

  @Path("/person")
  @GET
  @Produces(MediaType.APPLICATION_JSON)
  public Person getPerson() {
      return new Person("FistName","LastName");
  }

}

http://localhost:8080/myapp/myresource/person

设置看起来很简单，但它不起作用，除了以下例外：

org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor aroundWriteTo SEVERE: MessageBodyWriter not found for media type=application/json, type=class jersey.grizzly.Person, genericType=class jersey.grizzly.Person.

我一直无法弄清楚我错过了什么（我已经经历了许多建议的答案，但都无济于事），可以使用另一套眼睛/视角。

Answer 1

鉴于MOXy是JAXB的衍生物，而JAXB的类型需要no-arg（默认）构造函数，因此在模型类中应该有一个no-arg构造函数。

另见

• 为什么JAXB需要一个no arg构造函数来进行编组？