Question

我是RESTful网络服务的新手，我正在开发一种网络服务：

使用XML流（通过泽西客户端）
然后将XML编组为Java Object
最后使用hibernate持久保存这个java对象。

解组并且一切正常，但每当我在返回响应之前尝试访问服务层以使用“持久”方法时，我会收到 500错误的响应。

即使我将整个hibernate代码放在Web服务主体中而没有访问服务层，我也会收到 500错误的响应。我不知道如何处理这个，你真的需要你的帮助。

项目类：

JAXB

int function1(){
    json_t *jsonObj;
    function2(jsonObj);
    char * output = NULL;
    output = jsonToChar(jsonObj); //output is NULL after this, so jsonObj is probably empty
    ...
    return (0);
}

int *function2(json_t *jsonObj){
    DL_MY_MSG myMsg;
    //here I set myMsg correctly

    jsonObj = myObjToJson(&myMsg);
    char * output = NULL;
    output = jsonToChar(jsonObj); //output has the expected contents from jsonObj, so jsonObj is OK

    return (0);
}

json_t *myObjToJson(DL_MY_MSG *inputMessage){
    //converts obj to json_t and returns it
}

模型类

@XmlRootElement(name = "student")
public class Student {

@XmlElement 
private int id;
@XmlElement
private String firstName;
@XmlElement
private String lastName;
@XmlElement
private int age;

public Student() { }

// getters and setters

}

StudentRest Class

@Entity
@Table(name = "student")
public class StudentModel {
@Id @GeneratedValue
@Column(name="ID")
private int id;

@Column(name="FIRSTNAME")
private String firstName;

@Column(name="LASTNAME")
private String lastName;

@Column(name="AGE")
private int age;

public StudentModel() { }

// getters and setters

}

jerseyClient Class

@Path("/xmlServices")
public class StudentRest{   

@POST
@Path("/send")
@Consumes(MediaType.APPLICATION_XML)

public Response consumeXML( Student student ) {
   // JAXB TO MODEL
  StudentModel model=new StudentModel();
  model.setFirstName(student.getFirstName());
  model.setLastName(student.getLastName());
  model.setAge(student.getAge());

       Session session = null;
       Transaction tx = null;
       session = HibernateUtil.getSessionFactory().openSession();
       tx = session.beginTransaction();

       session.save(model);

       tx.commit();
       session.close();



     String output = student.toString();

    return Response.status(200).entity(output).build();
}
}

HelpMeExceptionMapper类

 public class JerseyClient {

public static void main(String[] args) {
    try {

        Student st = new Student("Adriana", "Barrer", 12, 9);

        Client client = Client.create();

        WebResource webResource = client
                .resource("http://localhost:8080/JerseyXMLExample/rest/xmlServices/send");

        ClientResponse response = webResource.accept("application/xml")
                .post(ClientResponse.class, st);

        if (response.getStatus() != 200) {
            throw new RuntimeException("Failed : HTTP error code : "
                    + response.getStatus());
        }

        String output = response.getEntity(String.class);

        System.out.println("Server response : \n");
        System.out.println(output);

    } catch (Exception e) {

        e.printStackTrace();

    }

}

}

堆栈追踪：

 @Provider
 public class HelpMeExceptionMapper implements ExceptionMapper<Exception>{

 public Response toResponse(Exception e) {
    e.printStackTrace();
    return Response
                .status(Status.INTERNAL_SERVER_ERROR)
                .type(MediaType.APPLICATION_XML)
                .entity(e.getCause())
                .build();
}


}

泽西RESTful ressource，500错误

0 个答案: