Spring Boot @ResponseBody没有序列化实体ID

• Z时代
• 2024-01-10
• 分类：问答

有一个奇怪的问题，无法弄清楚如何处理。有简单的POJO：

@Entity
@Table(name = "persons")
public class Person {
    @Id
    @GeneratedValue
    private Long id;
    @Column(name = "first_name")
    private String firstName;
    @Column(name = "middle_name")
    private String middleName;
    @Column(name = "last_name")
    private String lastName;
    @Column(name = "comment")
    private String comment;
    @Column(name = "created")
    private Date created;
    @Column(name = "updated")
    private Date updated;
    @PrePersist
    protected void onCreate() {
        created = new Date();
    }
    @PreUpdate
    protected void onUpdate() {
        updated = new Date();
    }
    @Valid
    @OrderBy("id")
    @OneToMany(mappedBy = "person", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private List<PhoneNumber> phoneNumbers = new ArrayList<>();
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getMiddleName() {
        return middleName;
    }
    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public String getComment() {
        return comment;
    }
    public void setComment(String comment) {
        this.comment = comment;
    }
    public Date getCreated() {
        return created;
    }
    public Date getUpdated() {
        return updated;
    }
    public List<PhoneNumber> getPhoneNumbers() {
        return phoneNumbers;
    }
    public void addPhoneNumber(PhoneNumber number) {
        number.setPerson(this);
        phoneNumbers.add(number);
    }
    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}
@Entity
@Table(name = "phone_numbers")
public class PhoneNumber {
    public PhoneNumber() {}
    public PhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
    @Id
    @GeneratedValue
    private Long id;
    @Column(name = "phone_number")
    private String phoneNumber;
    @ManyToOne
    @JoinColumn(name = "person_id")
    private Person person;
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getPhoneNumber() {
        return phoneNumber;
    }
    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
    public Person getPerson() {
        return person;
    }
    public void setPerson(Person person) {
        this.person = person;
    }
    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}

其余端点：

@ResponseBody
@RequestMapping(method = RequestMethod.GET)
public List<Person> listPersons() {
    return personService.findAll();
}

在json响应中，除了Id之外，还有其他所有字段，我需要在前端编辑/删除人员。如何配置Spring Boot" title="Spring Boot">Spring Boot来序列化ID？

这就是现在的响应：

[{
  "firstName": "Just",
  "middleName": "Test",
  "lastName": "Name",
  "comment": "Just a comment",
  "created": 1405774380410,
  "updated": null,
  "phoneNumbers": [{
    "phoneNumber": "74575754757"
  }, {
    "phoneNumber": "575757547"
  }, {
    "phoneNumber": "57547547547"
  }]
}]

UPD具有双向hibernate映射，可能与问题有关。

回答：

我最近遇到了同样的问题，这是因为spring-boot-starter-data-rest默认情况下是这样工作的。请参阅我的SO问题-> 在将应用程序迁移到Spring Boot后使用Spring Data Rest时，我发现带有@Id的实体属性不再编组为JSON

要自定义其行为，可以扩展RepositoryRestConfigurerAdapter以公开特定类的ID。

import org.springframework.context.annotation.Configuration;
import org.springframework.data.rest.core.config.RepositoryRestConfiguration;
import org.springframework.data.rest.webmvc.config.RepositoryRestConfigurerAdapter;
@Configuration
public class RepositoryConfig extends RepositoryRestConfigurerAdapter {
    @Override
    public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {
        config.exposeIdsFor(Person.class);
    }
}

以上是 Spring Boot @ResponseBody没有序列化实体ID 的全部内容， 来源链接： utcz.com/qa/418584.html