Get HTTP错误：从glassfish Jersey Rest服务器获取响应Json对象时出现500

Question

我用球衣写了一个Rest网络服务。当我从get方法返回到客户端时，客户端收到一个HTTP ERROR： 500响应，如果我从MyMessage类返回String Object就可以了。服务类是：

@Path("msg")
public class MyMessage {

   @GET
   @Produces(MediaType.APPLICATION_JSON)
   public MyObject  getMessage() {
       MyObject object = new MyObject();
       object.setId(1);
       object.setMessage("sdsadsadsadsa");
       return object;
   }
}

从服务返回的类对象是包装消息的MyObject：

public class MyObject {
  private String message;
  private int id;

  public String getMessage() {
    return message;
  }

  public void setMessage(String message) {
    this.message = message;
  }

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }
}

我使用嵌入式码头服务器，这是pom.xml：

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>   
<jersey.version>2.25</jersey.version>
<jetty.version>9.2.10.v20150310</jetty.version>         
</properties>    

<dependencies>
<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-jetty-http</artifactId>
    <version>${jersey.version}</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.core</groupId>
    <artifactId>jersey-server</artifactId>
    <version>${jersey.version}</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
    <version>${jersey.version}</version>
</dependency>        
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-servlet</artifactId>
    <version>${jetty.version}</version>
</dependency>        
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>${jetty.version}</version>
</dependency> 
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-util</artifactId>
    <version>${jetty.version}</version>
</dependency>   
<dependency>
    <groupId>com.fasterxml.jackson.jaxrs</groupId>
    <artifactId>jackson-jaxrs-json-provider</artifactId>
    <version>2.3.3</version>
</dependency>
</dependencies>

Answer 1

替换pom中的以下依赖项。xml：

<dependency>
    <groupId>com.fasterxml.jackson.jaxrs</groupId>
    <artifactId>jackson-jaxrs-json-provider</artifactId>
    <version>2.3.3</version>
</dependency>

通过

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>${jersey.version}</version>
</dependency>