Question

用户实体

import javax.persistence.*;

@Entity
public class User {

@Id
@GeneratedValue
private Long id;

@Column(nullable = false)
private String name;

@Column(nullable = false)
private Integer age;

@Embedded
private Address address;

public User(){}

public User(String name, Integer age,Address address) {
    this.name = name;
    this.age = age;
    this.address = address;
}

public User(String name, Integer age) {
    this.name = name;
    this.age = age;
}

public Long getId() {
    return id;
}

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

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public Integer getAge() {
    return age;
}

public void setAge(Integer age) {
    this.age = age;
}

}

和地址实体

@JsonInclude(JsonInclude.Include.NON_NULL)
@Embeddable
public class Address {

private String city;

public Address() {
}

public Address( String city) {
    this.city = city;

}



public String getCity() {
    return city;
}

public void setCity(String city) {
    this.city = city;
}


}

控制器代码

   @ResponseStatus(HttpStatus.CREATED)
@RequestMapping(value = "users", method = RequestMethod.POST)
public void users(@RequestBody List<User> users) {
    this.userRepository.save(users);

}

当我用psot man发布json数据时，数据是

[
 {
  "name":"yaohao",
  "age":11,
  "address":{
    "city":"nantong"
 }

  },
  {
  "name":"yh",
  "age":11,
   "address":{
    "city":"nantong"
  }

 }
]

the address always null

当用户实体没有@Embedded地址实体时，代码工作正常，那么当我使用@Embedded注释时如何将json数据发布到控制器

Answer 1

与@Embedded的使用无关。在进行编组时，Jackson使用Java Bean属性来设置值，而User类缺少getAddress和setAddress杰克逊只是忽略它，因为它不存在。

要修复为Address添加getter和setter。

或者，不使用属性访问权限切换您的映射器以使用字段访问权限。有关详细信息，请参阅how to specify jackson to only use fields - preferably globally。

我如何在@Embeddable类中使用@Embedded将json发布到springboot控制器

1 个答案: