Spring Rest和Hibernate和JSON dosnt按預期工作

我正在開發與Spring框架，休眠和JSON的其餘Web應用程序。假設我有一個像下面兩個實體：Spring Rest和Hibernate和JSON dosnt按預期工作

University.java

public class University extends BaseEntity { 

    private String name; 
    private String address; 
    private String telephon; 


    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER,orphanRemoval = true,mappedBy = "university") 
    @JsonManagedReference 
    private List<Student> students=new ArrayList<>(); 
// setter an getter 
}

Student.java

public class Student extends BaseEntity{ 

    private String firstName; 

    private String lastName; 

    private String section; 

    @ManyToOne(fetch = FetchType.EAGER) 
    @JoinColumn(name = "UNIVERSITY_ID",nullable = false) 
    @JsonBackReference 
    private University university; 

// setter an getter 
    }

我的要求：

當我打電話的學生名單API，我需要在每個學生對象中使用大學對象，我需要用什麼樣的配置或註釋來處理這種情況？結果是：

[ 
    { 
     "id": 1, 
     "firstName": "aa", 
     "lastName": "aa", 
     "section": "aa" 
    }, 
    { 
     "id": 2, 
     "firstName": "bb", 
     "lastName": "bb", 
     "section": "bb" 
    }, 
    { 
     "id": 3, 
     "firstName": "cc", 
     "lastName": "cc", 
     "section": "cc" 
    } 
]

，我需要有這樣的反應當我打電話的學生名單

[ 
    { 
     "id": 1, 
     "firstName": "aa", 
     "lastName": "aa", 
     "section": "aa", 
     "university": { 
      "id": 1, 
      "name": "string", 
      "address": "string", 
      "telephon": "string" 
     } 
    }, 
    { 
     "id": 2, 
     "firstName": "bb", 
     "lastName": "bb", 
     "section": "bb", 
     "university": { 
      "id": 1, 
      "name": "string", 
      "address": "string", 
      "telephon": "string" 
     } 
    }, 
    { 
     "id": 3, 
     "firstName": "cc", 
     "lastName": "cc", 
     "section": "cc", 
     "university": { 
      "id": 3, 
      "name": "www", 
      "address": "www", 
      "telephon": "www" 
     } 
    } 
]

更新：

和大學名單，我需要這種反應

[ 
    { 
     "id": 1, 
     "name": "string", 
     "address": "string", 
     "telephon": "string", 
     "students": [ 
      { 
       "id": 1, 
       "firstName": "aa", 
       "lastName": "aa", 
       "section": "aa" 
      }, 
      { 
       "id": 2, 
       "firstName": "bb", 
       "lastName": "bb", 
       "section": "bb" 
      } 
     ] 
    }, 
    { 
     "id": 3, 
     "name": "www", 
     "address": "www", 
     "telephon": "www", 
     "students": [ 
      { 
       "id": 3, 
       "firstName": "cc", 
       "lastName": "cc", 
       "section": "cc" 
      } 
     ] 
    } 
]

任何幫助和建議表示讚賞。

來源

2017-10-09 Generic

我認爲你有傑克遜註解來聲明走錯了路：

@JsonManagedReference是參考前部 - 這通常被序列化的一個。

@JsonBackReference是引用的後面部分 - 它將從序列化中省略。

來源

2017-10-09 14:34:21

我需要在大學方面有@JsonManagedReference。因爲如果我刪除它，我無法熱切地獲得大學名單。 – Generic

爲什麼？一個是JPA，另一個是JSON序列化。 –

jpa完美地完成它，但是當我急切地需要雙方時，它會在json中遇到麻煩。它擁有@JsonManagedReference哪一方面會起作用。 – Generic

Spring Rest和Hibernate和JSON dosnt按預期工作

回答

相關問題