以下是Hibernate生成的SQL语句
Hibernate: insert into HOSPITAL_ADDRESS (DOOR_NO, STREET, REFERENCE_LANDMARK, HASH) values (?, ?, ?, ?)
Hibernate: insert into PHONE_NUMBER (AREA_CODE, NUMBER, HASH) values (?, ?, ?)
Hibernate: insert into FAX_NUMBER (AREA_CODE, NUMBER, HASH) values (?, ?, ?)
Hibernate: insert into HOSPITAL_CONTACT (PHONE_NUMBER_1, PHONE_NUMBER_2, FAX_NUMBER_1, FAX_NUMBER_2, WEBSITE, HASH) values (?, ?, ?, ?, ?, ?)
Hibernate: insert into CATARACT (SURGERY_VOLUME, FREE_CASES, PAID_CASES, IMPORTED, INDIAN, HASH) values (?, ?, ?, ?, ?, ?)
Hibernate: insert into PIN_CODE (PIN, AREA, CITY, STATE, HASH) values (?, ?, ?, ?, ?)
Hibernate: insert into HOSPITAL (NAME, PHONETICS, CATEGORY, SUB_CATEGORY, SERVICES, ADDRESS, CONTACT, CATARACT, PIN_CODE, HASH) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
这是堆栈跟踪：
org.hibernate.exception.ConstraintViolationException: could not insert: [com.mylabs.model.Hospital]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2176)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2656)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:563)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:551)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:547)
at com.mylab.ws.DataPersister.save(DataPersister.java:20)
at com.mylab.ws.HospitalServlet.testMethod(HospitalServlet.java:137)
at com.mylab.ws.HospitalServlet.handleResponse(HospitalServlet.java:81)
at com.mylab.ws.HospitalServlet.doGet(HospitalServlet.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:680)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`mylab`.`hospital`, CONSTRAINT `FK1C8CEE3A93A84897` FOREIGN KEY (`CONTACT`) REFERENCES `HOSPITAL_CONTACT` (`ID`))
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1039)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3597)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3529)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1990)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2151)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2625)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2415)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2333)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2318)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)
... 33 more
我尝试将一个HospitalContact实例持久保存到数据库中，并且它没有任何问题。仅当我尝试将Hospital对象保存到DB时才会发生这种情况。任何指针将不胜感激。我已经尝试了谷歌搜索和StackOverflow类似的问题，但我无法弄明白。但对于专家而言，这应该是小菜一碟。
Hospital.java
package com.mylabs.model;
import java.util.List;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
import com.mobsandgeeks.utils.CryptoUtils;
@Root
public class Hospital {
@Attribute private int id;
@Element private String name;
@Element private int phonetics; //TODO
@Element private String category;
@Element private String subCategory;
@Element private String services;
@Element private HospitalAddress address;
@Element private HospitalContact contact;
@ElementList private List<KeyContactInfo> keyContacts;
@Element private Cataract cataract;
@Element private PinCode pinCode;
@Element private String hash;
Hospital() {
}
public Hospital(int id, String name, int phonetics, String category, String subCategory,
String services, HospitalAddress address, HospitalContact contact, List<KeyContactInfo> keyContacts,
Cataract cataract, PinCode pinCode, String hash) {
this.id = id;
this.name = name;
this.phonetics = phonetics;
this.category = category;
this.subCategory = subCategory;
this.services = services;
this.address = address;
this.contact = contact;
this.keyContacts = keyContacts;
this.cataract = cataract;
this.pinCode = pinCode;
this.hash = hash;
}
public Hospital(String name, int phonetics, String category, String subCategory,
String services, HospitalAddress address, HospitalContact contact, List<KeyContactInfo> keyContacts,
Cataract cataract, PinCode pinCode) {
this.name = name;
this.phonetics = phonetics;
this.category = category;
this.subCategory = subCategory;
this.services = services;
this.address = address;
this.contact = contact;
this.keyContacts = keyContacts;
this.cataract = cataract;
this.pinCode = pinCode;
updateHash();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
updateHash();
}
public int getPhonetics() {
return phonetics;
}
public void setPhonetics(int phonetics) {
this.phonetics = phonetics;
updateHash();
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
updateHash();
}
public String getSubCategory() {
return subCategory;
}
public void setSubCategory(String subCategory) {
this.subCategory = subCategory;
updateHash();
}
public String getServices() {
return services;
}
public void setServices(String services) {
this.services = services;
updateHash();
}
public HospitalAddress getAddress() {
return address;
}
public void setAddress(HospitalAddress address) {
this.address = address;
}
public HospitalContact getContact() {
return contact;
}
public void setContact(HospitalContact contact) {
this.contact = contact;
updateHash();
}
public List<KeyContactInfo> getKeyContacts() {
return keyContacts;
}
public void setKeyContacts(List<KeyContactInfo> keyContacts) {
this.keyContacts = keyContacts;
updateHash();
}
public Cataract getCataract() {
return cataract;
}
public void setCataract(Cataract cataract) {
this.cataract = cataract;
updateHash();
}
public PinCode getPinCode() {
return pinCode;
}
public void setPinCode(PinCode pinCode) {
this.pinCode = pinCode;
updateHash();
}
public int getId() {
return id;
}
public String getHash() {
return hash;
}
@SuppressWarnings("unused")
private void setHash(String hash) {
this.hash = hash;
}
@SuppressWarnings("unused")
private void setId(int id) {
this.id = id;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(name);
sb.append(phonetics);
sb.append(category);
sb.append(subCategory);
sb.append(services);
sb.append(address);
sb.append(contact);
for(KeyContactInfo contact : keyContacts) {
sb.append(contact);
}
sb.append(cataract);
sb.append(pinCode);
return sb.toString();
}
private void updateHash() {
hash = CryptoUtils.md5HashOf(toString());
}
}
Hospital.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated May 23, 2011 4:13:51 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.mylabs.model.Hospital" table="HOSPITAL">
<id name="id" type="int">
<column name="ID" />
<generator class="native" />
</id>
<property name="name" type="java.lang.String">
<column name="NAME" />
</property>
<property name="phonetics" type="int">
<column name="PHONETICS" />
</property>
<property name="category" type="java.lang.String">
<column name="CATEGORY" />
</property>
<property name="subCategory" type="java.lang.String">
<column name="SUB_CATEGORY" />
</property>
<property name="services" type="java.lang.String">
<column name="SERVICES" />
</property>
<many-to-one name="address" class="com.mylabs.model.HospitalAddress" fetch="join" cascade="all">
<column name="ADDRESS" />
</many-to-one>
<many-to-one name="contact" class="com.mylabs.model.HospitalContact" fetch="join" cascade="all">
<column name="CONTACT" />
</many-to-one>
<many-to-one name="cataract" class="com.mylabs.model.Cataract" fetch="join" cascade="all">
<column name="CATARACT" />
</many-to-one>
<many-to-one name="pinCode" class="com.mylabs.model.PinCode" fetch="join" cascade="all">
<column name="PIN_CODE" />
</many-to-one>
<property name="hash" type="java.lang.String">
<column name="HASH" />
</property>
</class>
HopitalContact.java
package com.mylabs.model;
import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
import com.mobsandgeeks.utils.CryptoUtils;
@Root
public class HospitalContact {
@Attribute private int id;
@Element private PhoneNumber phoneNumber1;
@Element(required=false) private PhoneNumber phoneNumber2;
@Element(required=false) private FaxNumber faxNumber1;
@Element(required=false) private FaxNumber faxNumber2;
@Element(required=false) private String website;
@Element private String hash;
HospitalContact() {
}
public HospitalContact(int id, PhoneNumber phoneNumber1, PhoneNumber phoneNumber2,
FaxNumber faxNumber1, FaxNumber faxNumber2, String website, String hash) {
this.id = id;
this.phoneNumber1 = phoneNumber1;
this.phoneNumber2 = phoneNumber2;
this.faxNumber1 = faxNumber1;
this.faxNumber2 = faxNumber2;
this.website = website;
this.hash = hash;
}
public HospitalContact(PhoneNumber phoneNumber1, PhoneNumber phoneNumber2,
FaxNumber faxNumber1, FaxNumber faxNumber2, String website) {
this.phoneNumber1 = phoneNumber1;
this.phoneNumber2 = phoneNumber2;
this.faxNumber1 = faxNumber1;
this.faxNumber2 = faxNumber2;
this.website = website;
updateHash();
}
public PhoneNumber getPhoneNumber1() {
return phoneNumber1;
}
public void setPhoneNumber1(PhoneNumber phoneNumber1) {
this.phoneNumber1 = phoneNumber1;
}
public PhoneNumber getPhoneNumber2() {
return phoneNumber2;
}
public void setPhoneNumber2(PhoneNumber phoneNumber2) {
this.phoneNumber2 = phoneNumber2;
}
public FaxNumber getFaxNumber1() {
return faxNumber1;
}
public void setFaxNumber1(FaxNumber faxNumber1) {
this.faxNumber1 = faxNumber1;
}
public FaxNumber getFaxNumber2() {
return faxNumber2;
}
public void setFaxNumber2(FaxNumber faxNumber2) {
this.faxNumber2 = faxNumber2;
}
public String getWebsite() {
return website;
}
public void setWebsite(String website) {
this.website = website;
}
public int getId() {
return id;
}
public String getHash() {
return hash;
}
private void updateHash() {
hash = CryptoUtils.md5HashOf(toString());
}
@SuppressWarnings("unused")
private void setHash(String hash) {
this.hash = hash;
}
@SuppressWarnings("unused")
private void setId(int id) {
this.id = id;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
Object[] contactNumbers = { phoneNumber1, phoneNumber2, faxNumber1, faxNumber2 };
for(Object number : contactNumbers) {
if(number instanceof PhoneNumber) {
PhoneNumber n = (PhoneNumber) number;
if(n != null) {
sb.append(n.getAreaCode());
sb.append(n.getNumber());
}
} else if(number instanceof FaxNumber) {
FaxNumber n = (FaxNumber) number;
if(n != null) {
sb.append(n.getAreaCode());
sb.append(n.getNumber());
}
}
}
sb.append(website);
return sb.toString();
}
}
HospitalContact.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated May 23, 2011 4:13:51 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.mylabs.model.HospitalContact" table="HOSPITAL_CONTACT">
<id name="id" type="int">
<column name="ID" />
<generator class="native" />
</id>
<many-to-one name="phoneNumber1" class="com.mylabs.model.PhoneNumber" fetch="join" cascade="all">
<column name="PHONE_NUMBER_1" />
</many-to-one>
<many-to-one name="phoneNumber2" class="com.mylabs.model.PhoneNumber" fetch="join" cascade="all">
<column name="PHONE_NUMBER_2" />
</many-to-one>
<many-to-one name="faxNumber1" class="com.mylabs.model.FaxNumber" fetch="join" cascade="all">
<column name="FAX_NUMBER_1" />
</many-to-one>
<many-to-one name="faxNumber2" class="com.mylabs.model.FaxNumber" fetch="join" cascade="all">
<column name="FAX_NUMBER_2" />
</many-to-one>
<property name="website" type="java.lang.String">
<column name="WEBSITE" />
</property>
<property name="hash" type="java.lang.String">
<column name="HASH" />
</property>
</class>
</hibernate-mapping>
持久存在对象的代码
package com.mylab.ws;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.mobsandgeeks.utils.HibernateUtils;
public class DataPersister {
//************************************************************************************************************
// Save Method
//************************************************************************************************************
public static int save(Object hibernateMappedObject) {
Session session = HibernateUtils.getSessionFactory().openSession();
Transaction transaction = null;
int id = -1;
try {
transaction = session.beginTransaction();
id = (Integer) session.save(hibernateMappedObject);
transaction.commit();
} catch (HibernateException hex) {
transaction.rollback();
hex.printStackTrace();
} finally {
session.close();
}
return id;
}
}
我为错误的代码格式化道歉。
答案 0 :(得分：1)
我只是为父表和子表重置AUTO_INCREMENT到0（零）。
您可以使用以下命令在MySQL中执行此操作：
alter table yourtable auto_increment=0;
我运行了我的hibernate项目，问题解决了。当然，除非您指定的数字高于表格中的最后一个数字，否则您必须愿意删除表格中的数据才能重置或重置之前无效。
好吧，我希望这适合你。有时您的代码很好，数据库参数就是问题。