json - 对 JAX-RS 对象编码的 Glassfish XML(或 JSON)响应导致 HTTP 500 内部服务器错误

Question

我正在尝试获取 JAX RS 资源以返回带有 JSON 对象的响应。当我通过资源类中的 println() 调用显示响应属性时，我看到 MediaType 已正确设置为“application/json”，有一个实体与具有预期类型 (SalesOrder)、状态 (Status) 的响应相关联.FOUND) 并且响应对象是 OutboundJaxrsResponse 的一个实例。但不知何故，当浏览器(或 Jersey 客户端)收到响应时，这些响应属性似乎被“替换”，结果是 HTTP 500 内部服务器错误。我的 SalesOrder 类使用 @XmlRootElement 注释。

我的资源是这样的:

@GET
@Path("{orderUid}")
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public Response getSalesOrder(@PathParam("orderUid") Integer orderUid) {
    Response response = null;
    System.out.println("Entering SalesOrderResource getSalesOrder()...");
    SalesOrder retrievedSalesOrder =   salesOrderService.retrieveSalesOrder(orderUid);
     System.out.println("Service called and found salesOrder Uid: " + retrievedSalesOrder.getSalesOrderUid());
    if (retrievedSalesOrder != null) {
        System.out.println("SalesOrder found with UID: " + retrievedSalesOrder.getSalesOrderUid());
        response = Response.status(Status.FOUND).entity(retrievedSalesOrder).type(MediaType.APPLICATION_JSON).build();
        // The following readEntity call results in a Javax.ejb.EJBException ???
        // SalesOrder fetched = response.readEntity(SalesOrder.class);
    } else {
        response = Response.status(Status.NOT_FOUND).header("x-reason", "Order cannot be found").build();
    }
System.out.println("Response status: " + response.getStatus());
System.out.println("Response status info: " + response.getStatusInfo());
System.out.println("Response class: " + response.getClass());
System.out.println("Response length: " + response.getLength());
System.out.println("Response media type: " + response.getMediaType());
System.out.println("Response entity: " + response.getEntity());
    return response;
}

...这会在运行时产生以下结果:

2015-04-12T18:08:21.803-0600|信息:响应状态:3022015-04-12T18:08:21.803-0600|信息:响应状态信息:找到2015-04-12T18:08:21.803-0600|信息:响应类:类 org.glassfish.jersey.message.internal.OutboundJaxrsResponse2015-04-12T18:08:21.803-0600|信息:响应长度:-12015-04-12T18:08:21.803-0600|信息:响应媒体类型:application/xml2015-04-12T18:08:21.803-0600|信息:响应实体:business.salesOrderMgmt.entity.SalesOrder@5e49cadd

SalesOrder 实体定义为:

@Entity
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
@JsonIgnoreProperties({"subTotal", "userAccount"})
@Table(name="sales_order")
@NamedQuery(name="SalesOrder.findAll", query="SELECT s FROM SalesOrder s")
public class SalesOrder implements Serializable {
private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="SALES_ORDER_UID")
private int salesOrderUid;

@Column(name="ORDER_NUMBER")
private String orderNumber;

@Column(name="BILL_TO_CITY")
private String billToCity;

@Column(name="BILL_TO_FIRST_NAME")
private String billToFirstName;

@Column(name="BILL_TO_LAST_NAME")
private String billToLastName;

@Column(name="BILL_TO_STATE")
private String billToState;

@Column(name="BILL_TO_STREET_NAME")
private String billToStreetName;

@Column(name="BILL_TO_STREET_NUMBER")
private String billToStreetNumber;

@Column(name="BILL_TO_UNIT_NUMBER")
private String billToUnitNumber;

@Column(name="BILL_TO_ZIP_CODE")
private int billToZipCode;

@Column(name="CREDIT_CARD_CSV")
private int creditCardCsv;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="CREDIT_CARD_EXPIRATION_DATE")
private Date creditCardExpirationDate;

@Column(name="CREDIT_CARD_NUMBER")
private String creditCardNumber;

@Column(name="CREDIT_CARD_TYPE")
private String creditCardType;

@Column(name="EMAIL_ADDRESS")
private String emailAddress;

@Column(name="NAME_ON_CREDIT_CARD")
private String nameOnCreditCard;

@Temporal(TemporalType.TIMESTAMP)
@Column(name="SALES_ORDER_DATE")
private Date salesOrderDate;

@Column(name="SALES_ORDER_STATUS")
private String salesOrderStatus;

@Column(name="SHIP_TO_CITY")
private String shipToCity;

@Column(name="SHIP_TO_STATE")
private String shipToState;

@Column(name="SHIP_TO_STREET_NAME")
private String shipToStreetName;

@Column(name="SHIP_TO_STREET_NUMBER")
private String shipToStreetNumber;

@Column(name="SHIP_TO_UNIT_NUMBER")
private String shipToUnitNumber;

@Column(name="SHIP_TO_ZIP_CODE")
private int shipToZipCode;

@Column(name="PROMO_CODE")
private String promoCode;

//Calculated and persisted for data retrieval performance
@Column(name="SUB_TOTAL")
private BigDecimal subTotal;

@Column(name="DISCOUNT")
private BigDecimal discount;

@Column(name="SALES_TAX")
private BigDecimal salesTax;

@Column(name="SHIPPING")
private BigDecimal shipping;

@Column(name="TOTAL")
private BigDecimal total;

@Version
@Column(name="LAST_UPDATED_TIME")
private Timestamp lastUpdatedTime;

//bi-directional many-to-one association to UserAccount
@ManyToOne
@JoinColumn(name="USER_ACCOUNT_UID")
private UserAccount userAccount;

@OneToMany(targetEntity=SalesOrderLine.class, mappedBy = "salesOrder", cascade = CascadeType.ALL)
private List<SalesOrderLine> lineItems;

public SalesOrder() {
}

...getter 和 setter

我的 POM 中的依赖项包括:

    <dependency>
        <groupId>javax.ws.rs</groupId>
        <artifactId>javax.ws.rs-api</artifactId>
        <version>2.0.1</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.module</groupId>
        <artifactId>jackson-module-jaxb-annotations</artifactId>
        <version>2.5.2</version>
    </dependency>

不仅请求 ( http://localhost:8080/[myapp]/resources/salesOrders/13) 会导致 HTTP 500 内部服务器错误，而且当我尝试在资源中调用 response.readEntity(SalesOrder.class) 时，Glassfish 服务器日志会显示 javax.ejb.EJBException 警告由 java.lang.IllegalStateException 引起:org.glassfish.jersey.message.internal.OutboundJaxrsResponse.readEntity(OutboundJaxrsResponse.java:145) 的出站消息不支持方法。

我认为 SalesOrder 对象的 JAXB 编码存在问题，但我无法确定根本原因。如果我只是尝试以下操作，我仍然会收到 HTTP 500 内部服务器错误，表明既没有发生 XML 也没有发生 JSON 编码，但我认为这是内置到最新版本(Glassfish 4、JAX-RS 2)中的？

有什么想法吗？

Answer 1

我弄清楚了这个问题，为了其他人的利益，我会把它贴在这里。1)我在资源方法中添加了以下内容: @Consumes(MediaType.TEXT_PLAIN)2) 步骤 #1 在运行时导致以下错误: 在对象图中检测到循环。这将导致无限深的 XML3) 错误导致我将@XmlTransient 添加到与 OneToMany、ManyToMany 和 ManyToOne 中其他实体相关的所有实体字段。

现在我能够以 XML 和 JSON 格式返回响应。