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被正确设置为“application / json”，有一个实体与具有预期类型（SalesOrder），状态（状态的响应）相关联.FOUND）并且响应对象是OutboundJaxrsResponse的实例。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”，结果就是HTTP 500内部服务器错误。我的SalesOrder类使用@XmlRootElement注释。

我的资源如下：

@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;
}

...在运行时产生以下结果：

2015-04-12T18：08：21.803-0600 |信息：回复状态：302 2015-04-12T18：08：21.803-0600 |信息：响应状态信息：找到 2015-04-12T18：08：21.803-0600 |信息：响应类：class org.glassfish.jersey.message.internal.OutboundJaxrsResponse 2015-04-12T18：08：21.803-0600 |信息：响应时长：-1 2015-04-12T18：08：21.803-0600 |信息：响应媒体类型：application / xml 2015-04-12T18：08：21.803-0600 |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() {
}

......吸气者和二传手

我的POM中的依赖关系包括：

    <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>

请求（http://localhost:8080/[myapp]/resources/salesOrders/13）不仅会导致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。由java.lang.IllegalStateException引起的EJBException警告：org.glassfish.jersey.message.internal.OutboundJaxrsResponse.readEntity（OutboundJaxrsResponse.java:145）上的出站消息不支持该方法。

我认为SalesAXr对象的JAXB编组存在问题，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XML也没有JSON编组，但我认为这是内置于最新版本（Glassfish 4，JAX-RS 2）？

有什么想法吗？

Answer 1

我想出了问题并将其张贴在这里，以造福他人。 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。这将导致无限深度的XML 3）错误导致我将@XmlTransient添加到与OneToMany，ManyToMany和ManyToOne中的其他实体相关的所有实体字段。

现在我能够以XML和JSON返回响应。

Answer 2

我遇到过类似的问题。当然，请检查您的日志是否显示如下内容：

SEVERE：找不到媒体类型= application / json的MessageBodyWriter， type = class SalesOrder，genericType = class SalesOrder。

如果是这样，问题是您没有注册Jackson（或其他JSON编写器提供商）。有关说明，请参阅Jersey文档的此部分：

https://jersey.java.net/documentation/latest/media.html#d0e7857

就我而言，我选择了杰克逊。我在pom.xml中添加了以下内容。

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.5.2</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.jaxrs</groupId>
  <artifactId>jackson-jaxrs-json-provider</artifactId>
  <version>2.5.2</version>
</dependency>
<dependency>
  <groupId>org.glassfish.jersey.media</groupId>
  <artifactId>jersey-media-json-jackson</artifactId>
  <version>2.17</version>
</dependency>

然后我必须注册提供者：

public class Application extends ResourceConfig {
    public Application() {
        packages(<your ws package>);
        register(JacksonFeature.class);
    }
}

Glassfish XML（或JSON）对HTTP 500内部服务器错误中JAX-RS对象编组结果的响应

2 个答案: