没有从字符串值('1074')反序列化的字符串参数构造函数/工厂方法
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【中文标题】没有从字符串值(\'1074\')反序列化的字符串参数构造函数/工厂方法【英文标题】:no String-argument constructor/factory method to deserialize from String value ('1074')没有从字符串值('1074')反序列化的字符串参数构造函数/工厂方法 【发布时间】:2018-09-09 04:54:28 【问题描述】:我是 Spring DataJPA + REST 项目的新手,我正在尝试从具有 OneToOne 单向关系的引用 EmployerType 执行添加新或编辑 Employer。任务很简单,但我被卡住了。当我尝试添加或编辑数据时出现此错误:
org.springframework.http.converter.HttpMessageNotReadableException:
Could not read document: Can not construct instance of
tr.mis.domain.EmployerType: no String-argument constructor/factory
method to deserialize from String value ('1074') at [Source:
java.io.PushbackInputStream@6d856887; line: 1, column: 609] (through
reference chain: tr.mis.domain.Employer["employerType"]); nested
exception is com.fasterxml.jackson.databind.JsonMappingException: Can
not construct instance of tr.mis.domain.EmployerType: no
String-argument constructor/factory method to deserialize from String
value ('1074')
以下是有关课程的信息。
@Entity
@Table(name = "employer")
public class Employer implements Serializable
@GenericGenerator(
name = "wikiSequenceGenerator",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
parameters =
@Parameter(name = "sequence_name", value = "WIKI_SEQUENCE"),
@Parameter(name = "initial_value", value = "1000"),
@Parameter(name = "increment_size", value = "1")
)
@Id
@GeneratedValue(generator = "wikiSequenceGenerator")
private Long employerId;
private String uid;
private String name;
private String address;
private String headName;
//@JsonIgnore
@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
// @PrimaryKeyJoinColumn
@JoinColumn(name = "employer_type_id")
private EmployerType employerType;
//Getters and Setters
EmployerType 类
@Entity
@Table(name = "employertype")
public class EmployerType
@GenericGenerator(
name = "wikiSequenceGenerator",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
parameters =
@Parameter(name = "sequence_name", value = "WIKI_SEQUENCE"),
@Parameter(name = "initial_value", value = "1000"),
@Parameter(name = "increment_size", value = "1")
)
@Id
@GeneratedValue(generator = "wikiSequenceGenerator")
private Long employerTypeId;
private String uid;
private String employerTypeName;
//Getters and Setters
休息控制器
@RequestMapping(value = "/employers", method = RequestMethod.PUT)
public Employer updateEmployer(@RequestBody Employer employer)
return employerRepository.save(employer);
【问题讨论】:
查看我的相关问题:1、2,也许他们可以帮助... 只需删除@JoinColumn(name = "employer_type_id")
。它应该工作
【参考方案1】:
我已通过在 EmployerType 类中添加 String 构造函数来解决此问题。
public EmployerType(String employerTypeName)
// TODO Auto-generated constructor stub
【讨论】:
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