ドキュメントを読み取れませんでした。com.fasterxml.jackson.databind.JsonMappingException

私はRESTとHTTPを介して通信するサーバークライアントアプリケーションを構築しています。問題は、私はタスクを作成しようとしています。私は、クライアントから送信されたJSONは次のようになります。ドキュメントを読み取れませんでした。com.fasterxml.jackson.databind.JsonMappingException

{ 
    "title": "Message Not Readable", 
    "status": 400, 
    "detail": "Could not read document: N/A (through reference chain:  de.name.supervisor.rest.domain.Task[\"author\"]->de.name.supervisor.rest.domain.User[\"assignedTasks\"]->java.util.HashSet[0]->de.name.supervisor.rest.domain.Task[\"author\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: N/A (through reference chain: de.name.supervisor.rest.domain.Task[\"author\"]->de.name.supervisor.rest.domain.User[\"assignedTasks\"]->java.util.HashSet[0]->de.name.supervisor.rest.domain.Task[\"author\"])","timeStamp": 1466859943472, 
    "developerMessage": "org.springframework.http.converter.HttpMessageNotReadableException", 
    "errors": {} 
}

私は見当がつかない、正確に何を動作しません：

{ 
"taskType": "USER_STORY", 
"headLine": "ew", 
"taskText": "wewe", 
"author": { 
"id": 1, 
"confirmed": false, 
"email": "[email protected]", 
"userName": "Daniel", 
"password": "test", 
"creationTime": 1466843454239, 
"assignedTasks": [ 
    { 
    "id": 1, 
    "possibleTaskTypes": [ 
     "USER_STORY", 
     "TECHNICAL_STORY", 
     "BUG" 
    ], 
    "possibleTaskContainer": [ 
     "PRODUCT_BACKLOG", 
     "SELECTED_BACKLOG", 
     "SPRINT" 
    ], 
    "taskType": "USER_STORY", 
    "headLine": "123", 
    "taskText": "fsfd", 
    "possibleworkFlowStati": [ 
     "START", 
     "READY_FOR_ESTIMATION", 
     "READY_FOR_SPRINT", 
     "OPEN", 
     "IN_PROGRESS", 
     "DONE" 
    ], 
    "author": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "assignee": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "comments": [], 
    "creationTime": 1466843507898 
    } 
], 
"createdTasks": [ 
    { 
    "id": 1, 
    "possibleTaskTypes": [ 
     "USER_STORY", 
     "TECHNICAL_STORY", 
     "BUG" 
    ], 
    "possibleTaskContainer": [ 
     "PRODUCT_BACKLOG", 
     "SELECTED_BACKLOG", 
     "SPRINT" 
    ], 
    "taskType": "USER_STORY", 
    "headLine": "123", 
    "taskText": "fsfd", 
    "possibleworkFlowStati": [ 
     "START", 
     "READY_FOR_ESTIMATION", 
     "READY_FOR_SPRINT", 
     "OPEN", 
     "IN_PROGRESS", 
     "DONE" 
    ], 
    "author": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "assignee": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "comments": [], 
    "creationTime": 1466843507898 
    } 
] 
}, 
"assignee": { 
"id": 1, 
"confirmed": false, 
"email": "[email protected]", 
    "userName": "Daniel", 
"password": "test", 
"creationTime": 1466843454239, 
"assignedTasks": [ 
    { 
    "id": 1, 
    "possibleTaskTypes": [ 
     "USER_STORY", 
     "TECHNICAL_STORY", 
     "BUG" 
    ], 
    "possibleTaskContainer": [ 
     "PRODUCT_BACKLOG", 
     "SELECTED_BACKLOG", 
     "SPRINT" 
    ], 
    "taskType": "USER_STORY", 
    "headLine": "123", 
    "taskText": "fsfd", 
    "possibleworkFlowStati": [ 
     "START", 
     "READY_FOR_ESTIMATION", 
     "READY_FOR_SPRINT", 
     "OPEN", 
     "IN_PROGRESS", 
     "DONE" 
    ], 
    "author": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "assignee": { 
     "id": 1, 
     "confirmed": false 
    }, 
    "comments": [], 
    "creationTime": 1466843507898 
    } 
], 
"createdTasks": [ 
    { 
    "id": 1 
    } 
] 
} 
}

私はサーバーから取得エラー-のメッセージはこれです。私は単一のユーザーを投稿するとき、私は問題はありません。

威張っ-UIによって生成された例JSONは次のとおりです。

{ 
    "comments": [ 
    "string" 
    ], 
    "creationTime": 0, 
    "possibleTaskContainer": [ 
    "string" 
    ], 
    "author": { 
    "password": "string", 
    "creationTime": 0, 
    "createdTasks": [ 
     {} 
    ], 
    "id": 0, 
    "userName": "string", 
    "confirmed": true, 
    "email": "string", 
    "assignedTasks": [ 
     {} 
    ] 
    }, 
    "sprint": { 
    "inProgress": [ 
     {} 
    ], 
    "creationTime": 0, 
    "endDate": { 
     "dayOfWeek": "MONDAY", 
     "month": "JANUARY", 
     "year": 0, 
     "dayOfMonth": 0, 
     "era": { 
     "value": 0 
     }, 
     "dayOfYear": 0, 
     "monthValue": 0, 
     "chronology": { 
     "id": "string", 
     "calendarType": "string" 
     }, 
     "leapYear": true 
    }, 
    "allTasks": [ 
     {} 
    ], 
    "sprintName": "string", 
    "id": 0, 
    "toDos": [ 
     {} 
    ], 
    "done": [ 
     {} 
    ], 
    "startDate": { 
     "dayOfWeek": "MONDAY", 
     "month": "JANUARY", 
     "year": 0, 
     "dayOfMonth": 0, 
     "era": { 
     "value": 0 
     }, 
     "dayOfYear": 0, 
     "monthValue": 0, 
     "chronology": { 
     "id": "string", 
     "calendarType": "string" 
     }, 
     "leapYear": true 
    } 
    }, 
    "taskContainer": "string", 
    "headLine": "string", 
    "taskType": "string", 
    "id": 0, 
    "possibleTaskTypes": [ 
    "string" 
    ], 
    "assignee": { 
    "password": "string", 
    "creationTime": 0, 
    "createdTasks": [ 
     {} 
    ], 
    "id": 0, 
    "userName": "string", 
    "confirmed": true, 
    "email": "string", 
    "assignedTasks": [ 
     {} 
    ] 
    }, 
    "possibleworkFlowStati": [ 
    "string" 
    ], 
    "taskText": "string", 
    "status": "string" 
}

はおそらく唯一のIDがあり、フィールドを確認し、クライアントから送信されたassingeeとJSON内のユーザーオブジェクトの問題ですか？これが理由なら、私のコントローラーは機能しません。 POSTリクエストのためのしたがって、ここでコントローラ方法：

public HttpResponse postTask(Task task)throws ClientProtocolException, IOException{ 
     HttpClient client = HttpClients.createDefault(); 
     HttpPost post = new HttpPost(TASK_URI_V1); 
     Gson gson = new Gson(); 
     String json = gson.toJson(task); 
     logger.info("Request-Body created: "+json); 
     post.setEntity(new StringEntity(json)); 
     post.setHeader("Content-type", "application/json"); 
     HttpResponse response = client.execute(post); 
     logger.info("Response from Web-Service after executing postTask request: "+response.getStatusLine().toString()); 
     logger.info("Response Head from Web-Service after executing postTask request: "+response.toString()); 
     logger.info("Response Body from Web-Service after executing postTask request: "+RestControllerUtils.getResponseBodyAsString(response)); 

     return response; 
    }

そして、ここでは、クライアントのユーザー・モデル：

@JsonIgnoreProperties(ignoreUnknown = true) 
public class User { 

    public User(){}; 

    public User(int id){ 
     setId(new Long(id)); 
    } 

    private Long id; 

    private boolean confirmed; 

    private String email; 

    private String userName; 

    private String password; 

    private Long creationTime; 

    private Set<Task> assignedTasks; 

    private Set<Task> createdTasks; 

    public Long getId() { 
     return id; 
    } 

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

    public boolean isConfirmed() { 
     return confirmed; 
    } 

    public void setConfirmed(boolean confirmed) { 
     this.confirmed = confirmed; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    public String getUserName() { 
     return userName; 
    } 

    public void setUserName(String userName) { 
     this.userName = userName; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public Long getCreationTime() { 
     return creationTime; 
    } 

    public void setCreationTime(Long creationTime) { 
     this.creationTime = creationTime; 
    } 

    public Set<Task> getAssignedTasks() { 
     return assignedTasks; 
    } 

    public void setAssignedTasks(Set<Task> assignedTasks) { 
     this.assignedTasks = assignedTasks; 
    } 

    public void addAssignedTasks(Task task){ 
     addAssignedTasks(task,true); 
    } 

    void addAssignedTasks(Task task, boolean set){ 
     if(task != null){ 
      getAssignedTasks().add(task); 
      if(set){ 
       task.setAssignee(this); 
      } 
     } 
    } 
    public void removeAssidnedTask(Task task) { 
     getAssignedTasks().remove(task); 
     task.setAssignee(null);; 
    } 

    public Set<Task> getCreatedTasks() { 
     return createdTasks; 
    } 

    public void setCreatedTasks(Set<Task> createdTasks) { 
     this.createdTasks = createdTasks; 
    } 

    public void addCreatedTask(Task task){ 
     addCreatedTask(task,true); 
    } 

    void addCreatedTask(Task task, boolean set){ 
     if(task != null){ 
      getCreatedTasks().add(task); 
      if(set){ 
       task.setAuthor(this); 
      } 
     } 
    } 

    public void removeCreatedTask(Task task) { 
     getCreatedTasks().remove(task); 
     task.setAuthor(null); 
    } 

}

およびサーバーのユーザーモデル：

@Entity 
@Table(name="User") 

@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class,property="@id", scope = User.class) 
public class User { 
    @Id 
    @GeneratedValue 
    @Column(name="USER_ID") 
    private Long id; 

    @Column(name="CONFIRMATION") 
    private boolean confirmed; 

    @Column(name = "EMAIL",nullable = false) 
    private String email; 

    @Column(name = "USERNAME",nullable = false) 
    @NotNull 
    private String userName; 

    @Column(name="PASSWORD",nullable = false) 
    @NotNull 
    private String password; 

    @Column(name="TIMESTAMP") 
    private Long creationTime; 

    @OneToMany(cascade={CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }, mappedBy="author",fetch=FetchType.EAGER) 
    private Set<Task>assignedTasks; 

    @OneToMany(cascade={CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }, mappedBy="assignee",fetch=FetchType.EAGER) 
    private Set<Task>createdTasks; 


    public User() { 
    } 

    public Long getId() { 
     return id; 
    } 

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



    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 

    public String getUserName() { 
     return userName; 
    } 

    public void setUserName(String userName) { 
     this.userName = userName; 
    } 

    public String getPassword() { 
     return password; 
    } 

    public void setPassword(String password) { 
     this.password = password; 
    } 

    public Long getCreationTime() { 
     return creationTime; 
    } 

    public void setCreationTime(Long creationTime) { 
     this.creationTime = creationTime; 
    } 

    public boolean isConfirmed() { 
     return confirmed; 
    } 

    public void setConfirmed(boolean confirmed) { 
     this.confirmed = confirmed; 
    } 

    public Set<Task> getAssignedTasks() { 
     return assignedTasks; 
    } 

    public void setAssignedTasks(Set<Task> assignedTasks) { 
     this.assignedTasks = assignedTasks; 
    } 

    public void addAssignedTasks(Task task){ 
     addAssignedTasks(task,true); 
    } 

    void addAssignedTasks(Task task, boolean set){ 
     if(task != null){ 
      getAssignedTasks().add(task); 
      if(set){ 
       task.setAssignee(this); 
      } 
     } 
    } 
    public void removeAssidnedTask(Task task) { 
     getAssignedTasks().remove(task); 
     task.setAssignee(null);; 
    } 

    public Set<Task> getCreatedTasks() { 
     return createdTasks; 
    } 

    public void setCreatedTasks(Set<Task> createdTasks) { 
     this.createdTasks = createdTasks; 
    } 

    public void addCreatedTask(Task task){ 
     addCreatedTask(task,true); 
    } 

    void addCreatedTask(Task task, boolean set){ 
     if(task != null){ 
      getCreatedTasks().add(task); 
      if(set){ 
       task.setAuthor(this); 
      } 
     } 
    } 

    public void removeCreatedTask(Task task) { 
     getCreatedTasks().remove(task); 
     task.setAuthor(null); 
    } 

    @Override 
    public String toString() { 
     return "User [id=" + id + ", confirmed=" + confirmed + ", email=" + email + ", userName=" + userName 
       + ", password=" + password + "]"; 
    } 


}

サーバーのタスククラス：

@Entity 
@Table(name="Task") 
//@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id") 
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class,property="@id", scope = Task.class) 
public class Task { 


    @Id 
    @GeneratedValue 
    @Column(name="TASK_ID") 
    private Long id; 

    @Transient 
    private List<String> possibleTaskTypes = TaskType.getTaskTypesAsString(); 

    @Transient 
    private List<String>possibleTaskContainer = TaskContainer.getTaskContainerAsString(); 

    @Column(name="TASK_Container") 
    private String taskContainer; 

    @Column(name="TASK_TYPE") 
    private String taskType; 

    @Column(name="HEAD_LINE") 
    private String headLine; 

    @Column(name="TASK_TEXT") 
    private String taskText; 

    @Transient 
    private List<String> possibleworkFlowStati = WorkFlowStatus.getWorkFlowsStatiAsString(); 

    @Column(name="WORKFLOW_STATUS") 
    private String status; 

    @ManyToOne(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }) 
    private User author; 

    @ManyToOne(cascade = {CascadeType.DETACH,CascadeType.MERGE,CascadeType.REFRESH }) //TODO Check wether remove too. 
    private User assignee; 

    @Column(name="COMMENTS") 
    @ElementCollection(targetClass=String.class) 
    private List<String>comments; 

    @ManyToOne(cascade=CascadeType.ALL) 
    private Sprint sprint; 

    @Column(name="TIMESTAMP") 
    private Long creationTime; 

    public Long getId() { 
     return id; 
    } 

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

    public String getHeadLine() { 
     return headLine; 
    } 

    public void setHeadLine(String headLine) { 
     this.headLine = headLine; 
    } 

    public String getTaskText() { 
     return taskText; 
    } 

    public void setTaskText(String taskText) { 
     this.taskText = taskText; 
    } 

    public User getAuthor() { 
     return author; 
    } 

    public void setAuthor(User author) { 
     setAuthor(author, true); 
    } 

    void setAuthor(User author, boolean add){ 
     this.author = author; 
     if(author !=null&&add){ 
      author.addCreatedTask(this, false); 
     } 
    } 

    public User getAssignee() { 
     return assignee; 
    } 

    public void setAssignee(User assignee) { 
     setAssignee(assignee,true); 
    } 

    void setAssignee(User assignee, boolean add){ 
     this.assignee = assignee; 
     if(assignee != null && add){ 
      assignee.addAssignedTasks(this,false); 
     } 
    } 

    public List<String> getComments() { 
     return comments; 
    } 

    public void setComments(List<String> comments) { 
     this.comments = comments; 
    } 

    public Sprint getSprint() { 
     return sprint; 
    } 

    public void setSprint(Sprint sprint) { 
     this.sprint = sprint; 
    } 

    public Long getCreationTime() { 
     return creationTime; 
    } 

    public void setCreationTime(Long creationTime) { 
     this.creationTime = creationTime; 
    } 

    public String getTaskType() { 
     return taskType; 
    } 

    public void setTaskType(String taskType) { 
     this.taskType = taskType; 
    } 

    public List<String> getPossibleTaskTypes() { 
     return possibleTaskTypes; 
    } 

    public void setPossibleTaskTypes(List<String> possibleTaskTypes) { 
     this.possibleTaskTypes = possibleTaskTypes; 
    } 

    public List<String> getPossibleworkFlowStati() { 
     return possibleworkFlowStati; 
    } 

    public void setPossibleworkFlowStati(List<String> possibleworkFlowStati) { 
     this.possibleworkFlowStati = possibleworkFlowStati; 
    } 

    public String getStatus() { 
     return status; 
    } 

    public void setStatus(String status) { 
     this.status = status; 
    } 

    public List<String> getPossibleTaskContainer() { 
     return possibleTaskContainer; 
    } 

    public void setPossibleTaskContainer(List<String> possibleTaskContainer) { 
     this.possibleTaskContainer = possibleTaskContainer; 
    } 

    public String getTaskContainer() { 
     return taskContainer; 
    } 

    public void setTaskContainer(String taskContainer) { 
     this.taskContainer = taskContainer; 
    } 

    @Override 
    public String toString() { 
     return "Task [id=" + id + ", possibleTaskTypes=" + possibleTaskTypes + ", possibleTaskContainer=" 
       + possibleTaskContainer + ", taskContainer=" + taskContainer + ", taskType=" + taskType + ", headLine=" 
       + headLine + ", taskText=" + taskText + ", possibleworkFlowStati=" + possibleworkFlowStati + ", status=" 
       + status + ", author=" + author + ", assignee=" + assignee + ", comments=" + comments + ", sprint=" 
       + sprint + ", creationTime=" + creationTime + "]"; 
    } 




}

出典

2016-06-25 n00bst3r

JSONに何らかの再帰が含まれているようです。

とassignedTasksを含むauthorがあり、それらのオブジェクトにはauthorが含まれています。

サーバーコードにJava Pojosを指定できますか？

UPDATE

私はPOJOを見たので、私はあなたがこのpostでいくつかの手がかりを見つけることができると思います。

createTasksとassignedTaskの処理方法をjacksonに伝えてください。

出典

2016-06-25 14:22:31

はい、もちろんです。私はちょうどポストユーザーとタスクを質問ポストに追加しました。 – n00bst3r

はい、@JsonIgnoreで解決し、作成者と譲受人のためにREST-Templateを構築しました。だからあなたは自分の要求でそれらを設定しなければなりません。 – n00bst3r

ドキュメントを読み取れませんでした。com.fasterxml.jackson.databind.JsonMappingException

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