Hibernate多对多映射为第三张表manytomany【xml和注解】实例(十七)
2013-09-27 10:14
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1 这个方法比较不错 【原先的多对多失败了就是因为没有进行第三张表映射造成的】
3结果
注解版看的稍微简单：
package com.bjsxt.hibernate;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
public class Teacher {
private int id;
private String name;
private Set<Student> students = new HashSet<Student>();
@Id
@GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ManyToMany
@JoinTable(name="t_s",
joinColumns={@JoinColumn(name="teacher_id")},
inverseJoinColumns={@JoinColumn(name="student_id")}
)
public Set<Student> getStudents() {
return students;
}
public void setStudents(Set<Student> students) {
this.students = students;
}
}
package com.sm.hibernate.pojo;
import java.util.Set;
public class IUser {
private int id;
private String name;
private ICard iCard;
private I2Card i2Card;
private Set<ICourse> courses;
public Set<ICourse> getCourses() {
return courses;
}
public void setCourses(Set<ICourse> courses) {
this.courses = courses;
}
public I2Card getI2Card() {
return i2Card;
}
public void setI2Card(I2Card i2Card) {
this.i2Card = i2Card;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public ICard getiCard() {
return iCard;
}
public void setiCard(ICard iCard) {
this.iCard = iCard;
}
}<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.sm.hibernate.pojo"> <class name="IUser" table="iuser"> <id name="id"> <generator class="native"></generator> </id> <property name="name" not-null ="true"></property> <one-to-one name="iCard"></one-to-one> <many-to-one name="i2Card" unique="true"></many-to-one> <set name="courses" table="iuc"> <key column="iUserId"></key> <many-to-many class="ICourse" column="iCourseId"></many-to-many> </set> </class> </hibernate-mapping>
package com.sm.hibernate.pojo;
import java.util.Set;
public class ICourse {
private int id;
private String name;
private Set<IUser> iUsers;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<IUser> getiUser() {
return iUsers;
}
public void setiUser(Set<IUser> iUser) {
this.iUsers = iUser;
}
}<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.sm.hibernate.pojo"> <class name="ICourse" table="icourse"> <id name="id"> <generator class="native"></generator> </id> <property name="name" not-null ="true"></property> <set name="iUsers" table="iuc"> <key column="iCourseId"></key> <many-to-many class="ICourse" column="iUserId"></many-to-many> </set> </class> </hibernate-mapping>
3结果
九月 27, 2013 10:11:44 上午 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
九月 27, 2013 10:11:44 上午 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.1}
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/Book.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/IUser.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/ICard.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/I2Card.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/ICourse.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/sm/hibernate/pojo/Category.hbm.xml
九月 27, 2013 10:11:44 上午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
九月 27, 2013 10:11:44 上午 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
九月 27, 2013 10:11:45 上午 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000227: Running hbm2ddl schema export
九月 27, 2013 10:11:45 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
九月 27, 2013 10:11:45 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 20
九月 27, 2013 10:11:45 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: false
九月 27, 2013 10:11:45 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/wanju]
九月 27, 2013 10:11:45 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=root, password=****}
alter table book
drop
foreign key FK2E3AE949F733E
alter table icard
drop
foreign key FK5F61EF9DFFCD6A8
alter table iuc
drop
foreign key FK198B735A1D52C
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: HHH000389: Unsuccessful: alter table iuc drop foreign key FK198B735A1D52C
alter table iuc
drop
foreign key FK198B76096495C
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: Table 'wanju.iuc' doesn't exist
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: HHH000389: Unsuccessful: alter table iuc drop foreign key FK198B76096495C
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: Table 'wanju.iuc' doesn't exist
alter table iuc
drop
foreign key FK198B76F252F3C
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: HHH000389: Unsuccessful: alter table iuc drop foreign key FK198B76F252F3C
九月 27, 2013 10:11:45 上午 org.hibernate.tool.hbm2ddl.SchemaExport perform
ERROR: Table 'wanju.iuc' doesn't exist
alter table iuser
drop
foreign key FK5FE8FB4D3B53C79
drop table if exists book
drop table if exists category
drop table if exists i2card
drop table if exists icard
drop table if exists icourse
drop table if exists iuc
drop table if exists iuser
create table book (
id integer not null auto_increment,
name varchar(200) not null,
author varchar(50) not null,
categoryId integer,
primary key (id)
)
create table category (
id integer not null auto_increment,
name varchar(200) not null,
primary key (id)
)
create table i2card (
id integer not null auto_increment,
name varchar(255) not null,
primary key (id)
)
create table icard (
id integer not null,
name varchar(255) not null,
primary key (id)
)
create table icourse (
id integer not null auto_increment,
name varchar(255) not null,
primary key (id)
)
create table iuc (
iUserId integer not null,
iCourseId integer not null,
primary key (iCourseId, iUserId)
)
create table iuser (
id integer not null auto_increment,
name varchar(255) not null,
i2Card integer unique,
primary key (id)
)
alter table book
add index FK2E3AE949F733E (categoryId),
add constraint FK2E3AE949F733E
foreign key (categoryId)
references category (id)
alter table icard
add index FK5F61EF9DFFCD6A8 (id),
add constraint FK5F61EF9DFFCD6A8
foreign key (id)
references iuser (id)
alter table iuc
add index FK198B735A1D52C (iUserId),
add constraint FK198B735A1D52C
foreign key (iUserId)
references icourse (id)
alter table iuc
add index FK198B76096495C (iUserId),
add constraint FK198B76096495C
foreign key (iUserId)
references iuser (id)
alter table iuc
add index FK198B76F252F3C (iCourseId),
add constraint FK198B76F252F3C
foreign key (iCourseId)
references icourse (id)
alter table iuser
add index FK5FE8FB4D3B53C79 (i2Card),
add constraint FK5FE8FB4D3B53C79
foreign key (i2Card)
references i2card (id)
九月 27, 2013 10:11:47 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH000030: Cleaning up connection pool [jdbc:mysql://localhost:3306/wanju]
九月 27, 2013 10:11:47 上午 org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000230: Schema export complete注解版看的稍微简单：
package com.bjsxt.hibernate;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
public class Teacher {
private int id;
private String name;
private Set<Student> students = new HashSet<Student>();
@Id
@GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ManyToMany
@JoinTable(name="t_s",
joinColumns={@JoinColumn(name="teacher_id")},
inverseJoinColumns={@JoinColumn(name="student_id")}
)
public Set<Student> getStudents() {
return students;
}
public void setStudents(Set<Student> students) {
this.students = students;
}
}
package com.bjsxt.hibernate;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
@Entity
public class Student {
private int id;
private String name;
private Set<Teacher> teachers = new HashSet<Teacher>();
@ManyToMany(mappedBy="students")
public Set<Teacher> getTeachers() {
return teachers;
}
public void setTeachers(Set<Teacher> teachers) {
this.teachers = teachers;
}
@Id
@GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
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