hibernate - 在休眠一对一关系中调用 findAll() 方法时出错

Question

1.EmployeeEntity类

@Entity
@Table(name = "Employee")
public class EmployeeEntitys {


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID", unique = true, nullable = false)
    private Integer employeeId;//Integer

    @Column(name = "EMAIL", unique = true, nullable = false, length = 100)
    private String email;

    @Column(name = "FIRST_NAME", unique = false, nullable = false, length = 100)
    private String firstName;

    @Column(name = "LAST_NAME", unique = false, nullable = false, length = 100)
    private String lastName;



     @OneToOne(cascade=CascadeType.ALL)//, fetch=FetchType.EAGER
     private AccountEntity account;

    public EmployeeEntitys() {

    }

    public EmployeeEntitys(Integer employeeId, String email, String firstName, String lastName) {
        super();
        this.employeeId = employeeId;
        this.email = email;
        this.firstName = firstName;
        this.lastName = lastName;

    }



    public Integer getEmployeeId() {
        return employeeId;
    }


    public void setEmployeeId(Integer employeeId) {
        this.employeeId = employeeId;
    }

    public String getEmail() {
        return email;
    }

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

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return "EmployeeEntitys [employeeId=" + employeeId + ", email=" + email + ", firstName=" + firstName
                + ", lastName=" + lastName + ", account=" + account + "]";
    }

    public AccountEntity getAccount() {
        return account;
    }

    public void setAccount(AccountEntity account) {
        this.account = account;
    }
}

2.Accountity class: 
package com.dxc.OneToOne.Bidirectional;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

@Entity
@Table(name = "ACCOUNT")
public class AccountEntity 
{


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ACCOUNT_ID", unique = true, nullable = false)
    private Integer accountId;

    @Column(name = "ACC_NUMBER", unique = true, nullable = false, length = 100)
    private String accountNumber;

    @OneToOne(mappedBy = "account",cascade=CascadeType.ALL)// fetch = FetchType.EAGER
    private EmployeeEntitys employee;


    public AccountEntity() {

    }


    public AccountEntity(Integer accountId, String accountNumber) {
        super();
        this.accountId = accountId;
        this.accountNumber = accountNumber;

    }


    public EmployeeEntitys getEmployee() {
        return employee;
    }

    public void setEmployee(EmployeeEntitys employee) {
        this.employee = employee;
    }

    public Integer getAccountId() {
        return accountId;
    }

    public void setAccountId(Integer accountId) {
        this.accountId = accountId;
    }

    public String getAccountNumber() {
        return accountNumber;
    }

    public void setAccountNumber(String accountNumber) {
        this.accountNumber = accountNumber;
    }
}

我创建了上述两个实体类，我的服务器启动良好，我正在使用 h2 数据库，我可以使用 CurdRepository 保存数据，但是每当我使用 findAll() 方法时，它都会给出以下错误

在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser。 BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson -databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9。 5] 在 com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser。 BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std。BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson -databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar:2.9.5]在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser。 BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson -databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase。serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind -2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com .fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanSerializer。序列化（BeanSerializer.java:155）~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField（BeanPropertyWriter.java:727）~[jackson-databind -2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719）~[jackson-databind-2.9.5.jar:2.9.5]在com.fasterxml.jackson.databind.ser.BeanSerializer.serialize（BeanSerializer.java:155）~[jackson-databind-2.9.5.jar :2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind .ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java: 155) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar :2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com。fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter .java:727) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind- 2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com。 fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727) ~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields (BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.BeanSerializer。序列化（BeanSerializer.java:155）~[jackson-databind-2.9.5.jar:2.9.5] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField（BeanPropertyWriter.java:727）~[jackson-databind -2.9.5.jar:2.9.5] 在 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719) ~[jackson-databind-2.9.5.jar:2.9.5]在 com.fasterxml.jackson.databind.ser.BeanSerializ

标签： hibernatejpaone-to-one