尝试从带有简单限制条件的休眠条件的数据库列表中列出对象时出现此错误
Criteria criteria = session.createCriteria(Licence.class);
criteria.add(Restrictions.eq("gym", gym.getId()));
List<Licence> list = criteria.list();
我有两个类:Licence
与Gym
有关联。这两个类正在扩展DataModel
,该@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
用于管理有关数据版本的信息-(创建和设置,创建者和创建者以及创建者和创建时间)。这两个类具有ojit_code也是重要的。
执照
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
public class Licence extends DataModel implements Serializable {
private Gym gym;
private String licenceType;
private String keyCode;
private Date expireDate;
private ELicenceExpiry expired;
public Licence() {
}
@ManyToOne
@JoinColumn(name="gym_id")
public Gym getGym() {
return gym;
}
public void setGym(Gym gym) {
this.gym = gym;
}
@Column(name = "licence_type")
public String getLicenceType() {
return licenceType;
}
public void setLicenceType(String licenceType) {
this.licenceType = licenceType;
}
@Column(name = "key_code")
public String getKeyCode() {
return keyCode;
}
public void setKeyCode(String keyCode) {
this.keyCode = keyCode;
}
@Column(name = "expire_date")
public Date getExpireDate() {
return expireDate;
}
public void setExpireDate(Date expireDate) {
this.expireDate = expireDate;
}
@Column(name = "expired")
@Enumerated(EnumType.ORDINAL)
public ELicenceExpiry getExpired() {
return expired;
}
public void setExpired(ELicenceExpiry expired) {
this.expired = expired;
}
}
健身房
@Entity
@Inheritance(strategy= InheritanceType.SINGLE_TABLE)
public class Gym extends DataModel implements Serializable{
private String shortName;
private String name;
private String nip;
private String street;
private String postCode;
private String localization;
private String telephone;
public Gym(){};
@Column(name="short_name")
public String getShortName() {
return shortName;
}
public void setShortName(String shortName) {
this.shortName = shortName;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNip() {
return nip;
}
public void setNip(String nip) {
this.nip = nip;
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
@Column(name="post_code")
public String getPostCode() {
return postCode;
}
public void setPostCode(String postCode) {
this.postCode = postCode;
}
public String getLocalization() {
return localization;
}
public void setLocalization(String localization) {
this.localization = localization;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
}
数据模型
@MappedSuperclass
public abstract class DataModel implements Serializable{
protected Long id;
protected String editor;
protected Date editDate;
protected Time editTime;
protected int dataState;
@Id
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getEditor() {
return editor;
}
public void setEditor(String editor) {
this.editor = editor;
}
@Column(name="edit_date")
public Date getEditDate() {
return editDate;
}
public void setEditDate(Date editDate) {
this.editDate = editDate;
}
@Column(name="edit_time")
public Time getEditTime() {
return editTime;
}
public void setEditTime(Time editTime) {
this.editTime = editTime;
}
@Column(name="data_state")
public int getDataState() {
return dataState;
}
public void setDataState(int dataState) {
this.dataState = dataState;
}
}
的MySQL
CREATE TABLE licence(
id INT(5) NOT NULL AUTO_INCREMENT,
gym_id int(3),
licence_type VARCHAR(10),
key_code VARCHAR(10),
expire_date DATE,
expired INT(1),
editor VARCHAR(10),
edit_date DATE,
edit_time TIME,
data_state INT(1) NOT NULL,
PRIMARY KEY (id),
FOREIGN KEY (gym_id) REFERENCES gym(id) ON DELETE SET NULL
);
CREATE TABLE gym(
id INT(3) NOT NULL AUTO_INCREMENT,
short_name VARCHAR(16) NOT NULL UNIQUE,
name VARCHAR(100) NOT NULL,
street VARCHAR(100),
post_code VARCHAR(6),
localization VARCHAR(64),
nip VARCHAR(13),
telephone VARCHAR(15),
editor VARCHAR(10),
edit_date DATE,
edit_time TIME,
data_state INT(1) NOT NULL,
PRIMARY KEY (id)
);
例外:
org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of pl.fitpartner.model.DataModel.id
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:192)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:346)
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4746)
at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:4465)
(...)
Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException@37bd68c3
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:169)
... 28 more
我做错了什么?
参考方案
尝试使用
criteria.add(Restrictions.eq("gym", gym));
也就是说,您将gym
代替criteria.add
作为gym.getId()
的第二个参数。
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