RESTful WebService不接受@POST嗎？

Question

我在Wildfly 8上運行了一些RESTful WebService。測試@GET可以很好地工作，但是@POST將不接受我的JSON對象。 我很難找出代碼中有什么問題，非常感謝您的幫助！ 代碼中的錯誤在哪里？

報告實體：

@Entity
@XmlRootElement
public class Report implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @XmlAttribute
    private Long id;

    @NotNull
    private String reportContent;

    public Long getId() {
        return id;
    }

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

    public String getReportContent() {
        return reportContent;
    }

    public void setReportContent(String reportContent) {
        this.reportContent = reportContent;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Report)) {
            return false;
        }
        Report other = (Report) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "com.myprog.abc.domain.Report[ id=" + id + " ]";
    }
}

報告資源：

@Path("report")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class ReportResource {
    @EJB
    private ReportService rs;

    @GET
    public Response findReports() {
        final List<Report> reports = rs.findAllReports();

        if(reports.size() <= 0)
            throw new NotFoundException("No reports found.");

        return Response.ok(new GenericEntity<List<Report>>(reports) {})
                       .build();
    }

    @GET
    @Path("{id:[1-9][0-9]*}")
    public Response findReport(@PathParam("id") Long id) {
        Report report = rs.findReport(id);

        if(report == null)
            throw new NotFoundException("No report found having the id " + id + ".");

        return Response.ok(report)
                       .build();
    }

    @POST
    public Response createReport(@Valid Report report) {
        rs.saveReport(report);

        return Response.created(URI.create("/" + report.getId()))
                       .build();
    }
}

使用http://localhost:8080/abc/rest/report/123測試@GET時，服務器返回：

{"reportContent":"This is my Report test content!","id":123}

使用http://localhost:8080/abc/rest/report和{“ reportContent”：“這是我的Report測試內容！”}測試@POST時，服務器返回：

Status Code: 415 Unsupported Media Type
Connection: keep-alive
Content-Length: 0
Date: Tue, 07 Oct 2014 14:04:55 GMT
Server: WildFly/8
x-powered-by: Undertow/1

Answer 1

我使用jaxrs Client API測試了您的示例：

Client client = ClientBuilder.newClient();
    WebTarget myResource = client.target("http://localhost:8080/web/rest/report");
    Report m = new Report();
    m.setId((long) 12);
    m.setReportContent("asdf");
    Entity<Report> report = Entity.json(m);
    Response r = myResource.request(MediaType.APPLICATION_JSON).post(report);
    System.out.println(r.getHeaderString("Location"));

最后，它在“響應位置”標頭中為我提供了適當的值。

Answer 2

確保您的請求中包含標題Content-type 。 該值必須為application/json ，因為這是您期望的值。

我很確定您會錯過它。