Spring 多对多删除对象
Spring ManyToMany delete object
我目前卡在 Spring 的某个点上。目前，我有 2 个 table，名为 Patient 和 Risk，还有一个名为 Riskpatient 的 table。每当我尝试从 Patient 实例中删除 Risk 对象时，它似乎并没有从列表中删除该对象。这是设置：
package medicapp.models.impl;
import com.fasterxml.jackson.annotation.JsonIgnore;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.*;
import java.util.Date;
import java.util.List;
@Entity
@Table(name="patient")
public class Patient {
@Id
@GeneratedValue
@Column(name="Id")
private int id;
@Column(name="NatNumber")
private String nationalNumber;
@Column(name="FirstName")
private String firstName;
@Column(name="LastName")
private String lastName;
@Column(name="Address")
private String address;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="birthplace")
private Municipality birthPlace;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="zipcode")
private Municipality municipality;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="healthinsuranceid")
private HealthInsurance healthInsurance;
@Column(name="Nationality")
private String nationality;
@Column(name="ContactName")
private String contactName;
@Column(name="ContactNumber")
private String contactNumber;
@Column(name="Phone")
private String phone;
@Column(name="Email")
private String email;
@Column(name="Gender")
private Character gender;
@Column(name="DateOfBirth")
@Temporal(TemporalType.DATE)
private Date birthDate;
@Column(name="Smoker")
private boolean smoker;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="bloodgroupid")
private BloodType bloodType;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="juridicalid")
private Juridical juridical;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "allergypatient",
joinColumns={@JoinColumn(name="PatientId")},
inverseJoinColumns={@JoinColumn(name="AllergyId")}
)
@JsonIgnore
private List<Allergy> allergies;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "medicationpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "MedicationId")
)
@JsonIgnore
private List<Medication> medications;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "chronicdiseasepatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "ChronicDiseaseId")
)
@JsonIgnore
private List<Disease> diseases;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "vaccinationpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "VaccinationId")
)
@JsonIgnore
private List<Vaccination> vaccinations;
@ManyToMany//set to eager to solve hibernate exception: collection is not associated with any session
@JoinTable(name = "riskpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "RiskId")
)
private List<Risk> risks;
@Column(name="lastwill")
private boolean lastWill;
/**
* Default Constructor without parameters, this is required for using Hibernate
*/
public Patient() {
}
/**
* Constructor used to manually make a new patient with the minimal required values
* @param firstName The first name of the patient
* @param lastName The last name of the patient
* @param address The address of the patient
* @param municipality The municipality of the patient
* @param birthDate The birthdate of the patient
*/
public Patient(String firstName, String lastName, String address, Municipality municipality, Date birthDate) {
this.firstName = firstName;
this.address = address;
this.municipality = municipality;
this.lastName = lastName;
this.lastName = lastName;
this.birthDate = birthDate;
}
/**
* Patient constructor that uses all the values retrieved from the e-ID
* @param firstName The first name of the patient
* @param lastName The last name of the patient
* @param address The address of the patient
* @param municipality The municipality of the patient
* @param birthPlace The birthplace of the patient
* @param nationalNumber The nationalnumber of the patient
* @param nationality The nationality of the patient
* @param gender The gender of the patient
* @param birthDate The birthdate of the patient
* @author Geert Peters
*/
public Patient(String firstName, String lastName, String address, Municipality municipality, Municipality birthPlace, String nationalNumber, String nationality, char gender, Date birthDate) {
this.address = address;
this.birthDate = birthDate;
this.birthPlace = birthPlace;
this.firstName = firstName;
this.gender = gender;
this.lastName = lastName;
this.nationality = nationality;
this.nationalNumber = nationalNumber;
this.municipality = municipality;
}
/**
* @param allergy adds an allergy to a patient's file
*/
public void addAllergy(Allergy allergy) {
this.allergies.add(allergy);
}
/**
* @param disease adds a disease to a patient's file
*/
public void addDisease(Disease disease) {
this.diseases.add(disease);
}
/**
* @param medication adds a medication to a patient's file
*/
public void addMedication(Medication medication) {
this.medications.add(medication);
}
/**
* @param vaccination adds a vaccination to a patient's file
*/
public void addVaccination(Vaccination vaccination) {
this.vaccinations.add(vaccination);
}
/**
* @param medication removes a medication from the list
*/
public void removeMedication(Medication medication) {
this.medications.remove(medication);
}
/**
* Gets smoker.
*
* @return Value of smoker.
*/
public boolean isSmoker() {
return smoker;
}
/**
* Gets birthPlace.
*
* @return Value of birthPlace.
*/
public Municipality getBirthPlace() {
return birthPlace;
}
/**
* Sets new id.
*
* @param id New value of id.
*/
public void setId(int id) {
this.id = id;
}
/**
* Sets new smoker.
*
* @param smoker New value of smoker.
*/
public void setSmoker(boolean smoker) {
this.smoker = smoker;
}
/**
* Gets id.
*
* @return Value of id.
*/
public int getId() {
return id;
}
/**
* Gets address.
*
* @return Value of address.
*/
public String getAddress() {
return address;
}
/**
* Sets new lastName.
*
* @param lastName New value of lastName.
*/
public void setLastName(String lastName) {
this.lastName = lastName;
}
/**
* Gets gender.
*
* @return Value of gender.
*/
public char getGender() {
return gender;
}
/**
* Gets nationalNumber.
*
* @return Value of nationalNumber.
*/
public String getNationalNumber() {
return nationalNumber;
}
/**
* Gets firstName.
*
* @return Value of firstName.
*/
public String getFirstName() {
return firstName;
}
/**
* Gets municipality.
*
* @return Value of municipality.
*/
public Municipality getMunicipality() {
return municipality;
}
/**
* Sets new nationalNumber.
*
* @param nationalNumber New value of nationalNumber.
*/
public void setNationalNumber(String nationalNumber) {
this.nationalNumber = nationalNumber;
}
/**
* Sets new nationality.
*
* @param nationality New value of nationality.
*/
public void setNationality(String nationality) {
this.nationality = nationality;
}
/**
* Sets new municipality.
*
* @param municipality New value of municipality.
*/
public void setMunicipality(Municipality municipality) {
this.municipality = municipality;
}
/**
* Gets phone.
*
* @return Value of phone.
*/
public String getPhone() {
return phone;
}
/**
* Sets new gender.
*
* @param gender New value of gender.
*/
public void setGender(char gender) {
this.gender = gender;
}
/**
* Gets contactNumber.
*
* @return Value of contactNumber.
*/
public String getContactNumber() {
return contactNumber;
}
/**
* Gets lastName.
*
* @return Value of lastName.
*/
public String getLastName() {
return lastName;
}
/**
* Sets new address.
*
* @param address New value of address.
*/
public void setAddress(String address) {
this.address = address;
}
/**
* Sets new firstName.
*
* @param firstName New value of firstName.
*/
public void setFirstName(String firstName) {
this.firstName = firstName;
}
/**
* Sets new birthPlace.
*
* @param birthPlace New value of birthPlace.
*/
public void setBirthPlace(Municipality birthPlace) {
this.birthPlace = birthPlace;
}
/**
* Gets nationality.
*
* @return Value of nationality.
*/
public String getNationality() {
return nationality;
}
/**
* Gets contactName.
*
* @return Value of contactName.
*/
public String getContactName() {
return contactName;
}
/**
* Gets birthDate.
*
* @return Value of birthDate.
*/
public Date getBirthDate() {
return birthDate;
}
/**
* Sets new contactName.
*
* @param contactName New value of contactName.
*/
public void setContactName(String contactName) {
this.contactName = contactName;
}
/**
* Sets new phone.
*
* @param phone New value of phone.
*/
public void setPhone(String phone) {
this.phone = phone;
}
/**
* Sets new contactNumber.
*
* @param contactNumber New value of contactNumber.
*/
public void setContactNumber(String contactNumber) {
this.contactNumber = contactNumber;
}
/**
* Sets new birthDate.
*
* @param birthDate New value of birthDate.
*/
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
/**
* Gets vaccinations.
*
* @return Value of vaccinations.
*/
public List<Vaccination> getVaccinations() {
return vaccinations;
}
/**
* Gets allergies.
*
* @return Value(Set) of allergies.
*/
public List<Allergy> getAllergies() {
return allergies;
}
/**
* Gets diseases.
*
* @return Value(List) of diseases.
*/
public List<Disease> getDiseases() {
return diseases;
}
/**
* Gets medications.
*
* @return Value(List) of medications.
*/
public List<Medication> getMedications() {
return medications;
}
/**
* Gets bloodgroup.
*
* @return Value of bloodgroup.
*/
public BloodType getBloodType() {
return bloodType;
}
/**
* Sets new bloodgroup.
*
* @param bloodType New value of bloodgroup.
*/
public void setBloodType(BloodType bloodType) {
this.bloodType = bloodType;
}
/**
* Gets HealthInsurance.
*
* @return Value of HealthInsureance.
*/
public HealthInsurance getHealthInsurance() {
return healthInsurance;
}
/**
* Sets new HealthInsurance.
*
* @param healthInsurance New value of HealthInsurance.
*/
public void setHealthInsurance(HealthInsurance healthInsurance) {
this.healthInsurance = healthInsurance;
}
/**
* Gets email.
*
* @return Value of email.
*/
public String getEmail() {
return email;
}
/**
* Sets new lastWill.
*
* @param lastWill New value of lastWill.
*/
public void setLastWill(boolean lastWill) {
this.lastWill = lastWill;
}
/**
* Sets new juridical.
*
* @param juridical New value of juridical.
*/
public void setJuridical(Juridical juridical) {
this.juridical = juridical;
}
/**
* Sets new allergies.
*
* @param allergies New value of allergies.
*/
public void setAllergies(List<Allergy> allergies) {
this.allergies = allergies;
}
/**
* Sets new diseases.
*
* @param diseases New value of diseases.
*/
public void setDiseases(List<Disease> diseases) {
this.diseases = diseases;
}
/**
* Gets lastWill.
*
* @return Value of lastWill.
*/
public boolean isLastWill() {
return lastWill;
}
/**
* Gets juridical.
*
* @return Value of juridical.
*/
public Juridical getJuridical() {
return juridical;
}
/**
* Sets new medications.
*
* @param medications New value of medications.
*/
public void setMedications(List<Medication> medications) {
this.medications = medications;
}
/**
* Sets new email.
*
* @param email New value of email.
*/
public void setEmail(String email) {
this.email = email;
}
/**
* Sets new vaccinations.
*
* @param vaccinations New value of vaccinations.
*/
public void setVaccinations(List<Vaccination> vaccinations) {
this.vaccinations = vaccinations;
}
/**
* Sets new Risks
* @param risks New value of risks
*/
public void setRisks(List<Risk> risks) {
this.risks = risks;
}
/**
* Gets all the risks bound to the patient
* @return a {@link java.util.List} instance containing all the risks of the patient
*/
public List<Risk> getRisks() {
return risks;
}
}
package medicapp.models.impl;
import javax.persistence.*;
import java.util.List;
@Entity
@Table(name="risk")
public class Risk {
@Id
@GeneratedValue
@Column(name="id")
private int id;
@Column(name="description")
private String description;
/** @ManyToMany(mappedBy = "risks")
private List<Patient> patientList;*/
public Risk() {
}
public Risk(String description) {
this.description = description;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
XML:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<import resource="spring-database.xml"/>
<import resource="spring-security.xml"/>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
<bean id="emf"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="medicapp" />
<property name="dataSource" ref="dataSource" />
<property name="persistenceProvider">
<bean class="org.hibernate.jpa.HibernatePersistenceProvider" />
</property>
</bean>
<bean id="tm" class="org.springframework.orm.jpa.JpaTransactionManager" p:entityManagerFactory-ref="emf" p:jpaDialect-ref="jpaDialect"/>
<tx:annotation-driven transaction-manager="tm"/>
<context:component-scan base-package="medicapp.*" />
<context:spring-configured />
<context:annotation-config />
<mvc:resources mapping="/resources/**" location="/resources/mytheme/" />
<mvc:annotation-driven/>
</beans>
我的 DAO 实现文件：
@Override
@Transactional
public Patient deleteRiskOfPatient(Patient patient, Risk risk) {
try {
patient.getRisks().remove(risk);
// em.flush();
return patient;
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getStackTrace());
}
return null;
}
调用DAO方法的控制器方法：
@RequestMapping(method = RequestMethod.GET, value="/delete")
@Transactional
public void test() {
Patient patient = medicappDAO.getPatientById(6);
Hibernate.initialize(patient.getRisks());
System.out.println( patient.getRisks().size());
medicappDAO.deleteRiskOfPatient(medicappDAO.getPatientById(6), medicappDAO.getPatientById(6).getRisks().get(0));
System.out.println( patient.getRisks().size());
}
每当我 运行 使用单元测试并将回滚设置为 false 时，它确实会被删除，但每当我使用控制器去那里时，它实际上并没有删除它。我什至在 DAO 方法中打印出列表的大小，在删除之前它说 4，之后是 3，但是当我回到控制器中时，它不知何故又回到了 4。
感谢您对此提供任何帮助。
国王问好
根据您发布的代码判断，您没有使用 Patient 的托管实例。在托管实例上尝试相同的方法，只需在修改患者之前添加 patient = em.find(Patient.class, patient.getId())。
还有一件事，如果 equals() 和 hashcode() 在 Risk 实体中实现，remove(risk) 将正常工作。可以肯定的是，您可以通过调用 risk = em.find(Risk.class, risk.getId()).
来确保它也是托管实体
patient = em.find(Patient.class, patient.getId());
risk = em.find(Risk.class, risk.getId());
patient.getRisks().remove(risk);
return patient;
我目前卡在 Spring 的某个点上。目前，我有 2 个 table，名为 Patient 和 Risk，还有一个名为 Riskpatient 的 table。每当我尝试从 Patient 实例中删除 Risk 对象时，它似乎并没有从列表中删除该对象。这是设置：
package medicapp.models.impl;
import com.fasterxml.jackson.annotation.JsonIgnore;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.*;
import java.util.Date;
import java.util.List;
@Entity
@Table(name="patient")
public class Patient {
@Id
@GeneratedValue
@Column(name="Id")
private int id;
@Column(name="NatNumber")
private String nationalNumber;
@Column(name="FirstName")
private String firstName;
@Column(name="LastName")
private String lastName;
@Column(name="Address")
private String address;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="birthplace")
private Municipality birthPlace;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="zipcode")
private Municipality municipality;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="healthinsuranceid")
private HealthInsurance healthInsurance;
@Column(name="Nationality")
private String nationality;
@Column(name="ContactName")
private String contactName;
@Column(name="ContactNumber")
private String contactNumber;
@Column(name="Phone")
private String phone;
@Column(name="Email")
private String email;
@Column(name="Gender")
private Character gender;
@Column(name="DateOfBirth")
@Temporal(TemporalType.DATE)
private Date birthDate;
@Column(name="Smoker")
private boolean smoker;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="bloodgroupid")
private BloodType bloodType;
@ManyToOne(cascade = {CascadeType.ALL})
@JoinColumn(name="juridicalid")
private Juridical juridical;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "allergypatient",
joinColumns={@JoinColumn(name="PatientId")},
inverseJoinColumns={@JoinColumn(name="AllergyId")}
)
@JsonIgnore
private List<Allergy> allergies;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "medicationpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "MedicationId")
)
@JsonIgnore
private List<Medication> medications;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "chronicdiseasepatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "ChronicDiseaseId")
)
@JsonIgnore
private List<Disease> diseases;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "vaccinationpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "VaccinationId")
)
@JsonIgnore
private List<Vaccination> vaccinations;
@ManyToMany//set to eager to solve hibernate exception: collection is not associated with any session
@JoinTable(name = "riskpatient",
joinColumns = @JoinColumn(name="PatientId"),
inverseJoinColumns = @JoinColumn(name = "RiskId")
)
private List<Risk> risks;
@Column(name="lastwill")
private boolean lastWill;
/**
* Default Constructor without parameters, this is required for using Hibernate
*/
public Patient() {
}
/**
* Constructor used to manually make a new patient with the minimal required values
* @param firstName The first name of the patient
* @param lastName The last name of the patient
* @param address The address of the patient
* @param municipality The municipality of the patient
* @param birthDate The birthdate of the patient
*/
public Patient(String firstName, String lastName, String address, Municipality municipality, Date birthDate) {
this.firstName = firstName;
this.address = address;
this.municipality = municipality;
this.lastName = lastName;
this.lastName = lastName;
this.birthDate = birthDate;
}
/**
* Patient constructor that uses all the values retrieved from the e-ID
* @param firstName The first name of the patient
* @param lastName The last name of the patient
* @param address The address of the patient
* @param municipality The municipality of the patient
* @param birthPlace The birthplace of the patient
* @param nationalNumber The nationalnumber of the patient
* @param nationality The nationality of the patient
* @param gender The gender of the patient
* @param birthDate The birthdate of the patient
* @author Geert Peters
*/
public Patient(String firstName, String lastName, String address, Municipality municipality, Municipality birthPlace, String nationalNumber, String nationality, char gender, Date birthDate) {
this.address = address;
this.birthDate = birthDate;
this.birthPlace = birthPlace;
this.firstName = firstName;
this.gender = gender;
this.lastName = lastName;
this.nationality = nationality;
this.nationalNumber = nationalNumber;
this.municipality = municipality;
}
/**
* @param allergy adds an allergy to a patient's file
*/
public void addAllergy(Allergy allergy) {
this.allergies.add(allergy);
}
/**
* @param disease adds a disease to a patient's file
*/
public void addDisease(Disease disease) {
this.diseases.add(disease);
}
/**
* @param medication adds a medication to a patient's file
*/
public void addMedication(Medication medication) {
this.medications.add(medication);
}
/**
* @param vaccination adds a vaccination to a patient's file
*/
public void addVaccination(Vaccination vaccination) {
this.vaccinations.add(vaccination);
}
/**
* @param medication removes a medication from the list
*/
public void removeMedication(Medication medication) {
this.medications.remove(medication);
}
/**
* Gets smoker.
*
* @return Value of smoker.
*/
public boolean isSmoker() {
return smoker;
}
/**
* Gets birthPlace.
*
* @return Value of birthPlace.
*/
public Municipality getBirthPlace() {
return birthPlace;
}
/**
* Sets new id.
*
* @param id New value of id.
*/
public void setId(int id) {
this.id = id;
}
/**
* Sets new smoker.
*
* @param smoker New value of smoker.
*/
public void setSmoker(boolean smoker) {
this.smoker = smoker;
}
/**
* Gets id.
*
* @return Value of id.
*/
public int getId() {
return id;
}
/**
* Gets address.
*
* @return Value of address.
*/
public String getAddress() {
return address;
}
/**
* Sets new lastName.
*
* @param lastName New value of lastName.
*/
public void setLastName(String lastName) {
this.lastName = lastName;
}
/**
* Gets gender.
*
* @return Value of gender.
*/
public char getGender() {
return gender;
}
/**
* Gets nationalNumber.
*
* @return Value of nationalNumber.
*/
public String getNationalNumber() {
return nationalNumber;
}
/**
* Gets firstName.
*
* @return Value of firstName.
*/
public String getFirstName() {
return firstName;
}
/**
* Gets municipality.
*
* @return Value of municipality.
*/
public Municipality getMunicipality() {
return municipality;
}
/**
* Sets new nationalNumber.
*
* @param nationalNumber New value of nationalNumber.
*/
public void setNationalNumber(String nationalNumber) {
this.nationalNumber = nationalNumber;
}
/**
* Sets new nationality.
*
* @param nationality New value of nationality.
*/
public void setNationality(String nationality) {
this.nationality = nationality;
}
/**
* Sets new municipality.
*
* @param municipality New value of municipality.
*/
public void setMunicipality(Municipality municipality) {
this.municipality = municipality;
}
/**
* Gets phone.
*
* @return Value of phone.
*/
public String getPhone() {
return phone;
}
/**
* Sets new gender.
*
* @param gender New value of gender.
*/
public void setGender(char gender) {
this.gender = gender;
}
/**
* Gets contactNumber.
*
* @return Value of contactNumber.
*/
public String getContactNumber() {
return contactNumber;
}
/**
* Gets lastName.
*
* @return Value of lastName.
*/
public String getLastName() {
return lastName;
}
/**
* Sets new address.
*
* @param address New value of address.
*/
public void setAddress(String address) {
this.address = address;
}
/**
* Sets new firstName.
*
* @param firstName New value of firstName.
*/
public void setFirstName(String firstName) {
this.firstName = firstName;
}
/**
* Sets new birthPlace.
*
* @param birthPlace New value of birthPlace.
*/
public void setBirthPlace(Municipality birthPlace) {
this.birthPlace = birthPlace;
}
/**
* Gets nationality.
*
* @return Value of nationality.
*/
public String getNationality() {
return nationality;
}
/**
* Gets contactName.
*
* @return Value of contactName.
*/
public String getContactName() {
return contactName;
}
/**
* Gets birthDate.
*
* @return Value of birthDate.
*/
public Date getBirthDate() {
return birthDate;
}
/**
* Sets new contactName.
*
* @param contactName New value of contactName.
*/
public void setContactName(String contactName) {
this.contactName = contactName;
}
/**
* Sets new phone.
*
* @param phone New value of phone.
*/
public void setPhone(String phone) {
this.phone = phone;
}
/**
* Sets new contactNumber.
*
* @param contactNumber New value of contactNumber.
*/
public void setContactNumber(String contactNumber) {
this.contactNumber = contactNumber;
}
/**
* Sets new birthDate.
*
* @param birthDate New value of birthDate.
*/
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
/**
* Gets vaccinations.
*
* @return Value of vaccinations.
*/
public List<Vaccination> getVaccinations() {
return vaccinations;
}
/**
* Gets allergies.
*
* @return Value(Set) of allergies.
*/
public List<Allergy> getAllergies() {
return allergies;
}
/**
* Gets diseases.
*
* @return Value(List) of diseases.
*/
public List<Disease> getDiseases() {
return diseases;
}
/**
* Gets medications.
*
* @return Value(List) of medications.
*/
public List<Medication> getMedications() {
return medications;
}
/**
* Gets bloodgroup.
*
* @return Value of bloodgroup.
*/
public BloodType getBloodType() {
return bloodType;
}
/**
* Sets new bloodgroup.
*
* @param bloodType New value of bloodgroup.
*/
public void setBloodType(BloodType bloodType) {
this.bloodType = bloodType;
}
/**
* Gets HealthInsurance.
*
* @return Value of HealthInsureance.
*/
public HealthInsurance getHealthInsurance() {
return healthInsurance;
}
/**
* Sets new HealthInsurance.
*
* @param healthInsurance New value of HealthInsurance.
*/
public void setHealthInsurance(HealthInsurance healthInsurance) {
this.healthInsurance = healthInsurance;
}
/**
* Gets email.
*
* @return Value of email.
*/
public String getEmail() {
return email;
}
/**
* Sets new lastWill.
*
* @param lastWill New value of lastWill.
*/
public void setLastWill(boolean lastWill) {
this.lastWill = lastWill;
}
/**
* Sets new juridical.
*
* @param juridical New value of juridical.
*/
public void setJuridical(Juridical juridical) {
this.juridical = juridical;
}
/**
* Sets new allergies.
*
* @param allergies New value of allergies.
*/
public void setAllergies(List<Allergy> allergies) {
this.allergies = allergies;
}
/**
* Sets new diseases.
*
* @param diseases New value of diseases.
*/
public void setDiseases(List<Disease> diseases) {
this.diseases = diseases;
}
/**
* Gets lastWill.
*
* @return Value of lastWill.
*/
public boolean isLastWill() {
return lastWill;
}
/**
* Gets juridical.
*
* @return Value of juridical.
*/
public Juridical getJuridical() {
return juridical;
}
/**
* Sets new medications.
*
* @param medications New value of medications.
*/
public void setMedications(List<Medication> medications) {
this.medications = medications;
}
/**
* Sets new email.
*
* @param email New value of email.
*/
public void setEmail(String email) {
this.email = email;
}
/**
* Sets new vaccinations.
*
* @param vaccinations New value of vaccinations.
*/
public void setVaccinations(List<Vaccination> vaccinations) {
this.vaccinations = vaccinations;
}
/**
* Sets new Risks
* @param risks New value of risks
*/
public void setRisks(List<Risk> risks) {
this.risks = risks;
}
/**
* Gets all the risks bound to the patient
* @return a {@link java.util.List} instance containing all the risks of the patient
*/
public List<Risk> getRisks() {
return risks;
}
}
package medicapp.models.impl;
import javax.persistence.*;
import java.util.List;
@Entity
@Table(name="risk")
public class Risk {
@Id
@GeneratedValue
@Column(name="id")
private int id;
@Column(name="description")
private String description;
/** @ManyToMany(mappedBy = "risks")
private List<Patient> patientList;*/
public Risk() {
}
public Risk(String description) {
this.description = description;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
XML:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<import resource="spring-database.xml"/>
<import resource="spring-security.xml"/>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
<bean id="emf"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="medicapp" />
<property name="dataSource" ref="dataSource" />
<property name="persistenceProvider">
<bean class="org.hibernate.jpa.HibernatePersistenceProvider" />
</property>
</bean>
<bean id="tm" class="org.springframework.orm.jpa.JpaTransactionManager" p:entityManagerFactory-ref="emf" p:jpaDialect-ref="jpaDialect"/>
<tx:annotation-driven transaction-manager="tm"/>
<context:component-scan base-package="medicapp.*" />
<context:spring-configured />
<context:annotation-config />
<mvc:resources mapping="/resources/**" location="/resources/mytheme/" />
<mvc:annotation-driven/>
</beans>
我的 DAO 实现文件：
@Override
@Transactional
public Patient deleteRiskOfPatient(Patient patient, Risk risk) {
try {
patient.getRisks().remove(risk);
// em.flush();
return patient;
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getStackTrace());
}
return null;
}
调用DAO方法的控制器方法：
@RequestMapping(method = RequestMethod.GET, value="/delete")
@Transactional
public void test() {
Patient patient = medicappDAO.getPatientById(6);
Hibernate.initialize(patient.getRisks());
System.out.println( patient.getRisks().size());
medicappDAO.deleteRiskOfPatient(medicappDAO.getPatientById(6), medicappDAO.getPatientById(6).getRisks().get(0));
System.out.println( patient.getRisks().size());
}
每当我 运行 使用单元测试并将回滚设置为 false 时，它确实会被删除，但每当我使用控制器去那里时，它实际上并没有删除它。我什至在 DAO 方法中打印出列表的大小，在删除之前它说 4，之后是 3，但是当我回到控制器中时，它不知何故又回到了 4。
感谢您对此提供任何帮助。
国王问好
根据您发布的代码判断，您没有使用 Patient 的托管实例。在托管实例上尝试相同的方法，只需在修改患者之前添加 patient = em.find(Patient.class, patient.getId())。
还有一件事，如果 equals() 和 hashcode() 在 Risk 实体中实现，remove(risk) 将正常工作。可以肯定的是，您可以通过调用 risk = em.find(Risk.class, risk.getId()).
patient = em.find(Patient.class, patient.getId());
risk = em.find(Risk.class, risk.getId());
patient.getRisks().remove(risk);
return patient;