Hibernate多对多配置

啥也不说，直接上代码。

多对多注解配置

学生表
@Entity
@Table(name ="T_STUDENT")
@SequenceGenerator(name ="SEQ_STUDENT", sequenceName = "SEQ_STUDENT")
public class Student implementsSerializable {
 private static finallong serialVersionUID = 2524659555729848644L;
 private Longid;
 private Stringname;
 private Datebirthday;
 private intsex;
 private Stringaddress;
 privateSet<Teacher>teacherList;
 @Id
 @GeneratedValue(strategy =GenerationType.SEQUENCE, generator = "SEQ_STUDENT")
 @Column(name = "ID",nullable = false, precision = 22, scale = 0)
 public Long getId(){
  returnid;
 }
 public voidsetId(Long id) {
  this.id =id;
 }
 @Column(name ="NAME")
 public StringgetName() {
  returnname;
 }
 public voidsetName(String name) {
  this.name =name;
 }
 @Temporal(TemporalType.DATE)
 @Column(name ="BIRTHDAY")
 public DategetBirthday() {
  returnbirthday;
 }
 public voidsetBirthday(Date birthday) {
  this.birthday= birthday;
 }
 @Column(name ="sex")
 public int getSex(){
  returnsex;
 }
 public voidsetSex(int sex) {
  this.sex =sex;
 }
 @Column(name ="address")
 public StringgetAddress() {
  returnaddress;
 }
 public voidsetAddress(String address) {
  this.address =address;
 }
 @ManyToMany(cascade= CascadeType.ALL)
 @JoinTable(name ="T_TEACHER_STUDENT",
   joinColumns= @JoinColumn(name = "student_id"),
   inverseJoinColumns= @JoinColumn(name = "teacher_id"))
 publicSet<Teacher> getTeacherList(){
  returnteacherList;
 }
 public voidsetTeacherList(Set<Teacher>teacherList) {
  this.teacherList= teacherList;
 }
}

教师表

@Entity
@Table(name = "T_TEACHER")
@SequenceGenerator(name = "SEQ_TEACHER", sequenceName = "SEQ_TEACHER")
public class Teacher implements Serializable {
private static final long serialVersionUID = 2297316923535111793L;
private Long id;
private String name;
private int sex;
private Set<Student> studentList;
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_TEACHER")
@Column(name = "ID", nullable = false, precision = 22, scale = 0)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name = "name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Column(name = "sex")
public int getSex() {
return sex;
}
public void setSex(int sex) {
this.sex = sex;
}
<span style="color:#FF0000;"> @ManyToMany(mappedBy = "teacherList", cascade = CascadeType.ALL)</span>
public Set<Student> getStudentList() {
return studentList;
}
public void setStudentList(Set<Student> studentList) {
this.studentList = studentList;
}
}

hibernate.cfg.xml配置2个class类

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 2.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>

<session-factory>

<!-- properties -->
<!-- 数据库URL -->
<property name="hibernate.connection.url">jdbc:mysql://localhost/onetomany</property>
<!-- 数据库JDBC驱动 -->
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<!-- 数据库用户名 -->
<property name="hibernate.connection.username">root</property>
<!-- 数据库密码 -->
<property name="hibernate.connection.password">hello</property>
<!-- 数据库方言 -->
<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<!-- 是否日志调试 -->
<property name="show_sql">true</property>
<!-- 是否使用数据库外连接 -->
<property name="use_outer_join">true</property>
<!-- 事务管理 使用JDBC Transaction（使用JTA会报错） -->
<property name="transaction.factory_class">
net.sf.hibernate.transaction.JDBCTransactionFactory
</property>
<!-- 指定hibernate每次提交的SQL数量  对批量操作的性能提升帮助很大！！！！！！！！！！！！！ -->
<property name="hibernate.jdbc.batch_size">25</property>
<!-- 映射文件配置，配置文件名必须包含其相对于根的全路径 -->

<mappingclass="com.dvn.li.model.Student"/>
<mappingclass="com.dvn.li.model.Teacher"/>

</session-factory>

</hibernate-configuration>

多对多注解非注解

用户User<strong>：</strong>

import java.util.HashSet;
import java.util.Set;

public class User {

private String userid;
private String username;
private String password;
private Set roles = new HashSet();

public User() {
super();
}

public String getUserid() {
return userid;
}

public void setUserid(String userid) {
this.userid = userid;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public Set getRoles() {
return roles;
}

public void setRoles(Set roles) {
this.roles = roles;
}
}

User.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="cn.qeli.ums.entity.User" table="Users">
<id name="userid" column="userid" length="32" >
<generator class="uuid.hex"></generator>
</id>
<property name="username" length="30" />
<property name="password" length="92" />
<set name="roles" table="user_role">
<key column="userid" />
<many-to-many column="roleid" class="cn.qeli.ums.entity.Role" />
</set>
</class>
</hibernate-mapping>

角色Role：

package cn.qeli.ums.entity;

import java.util.HashSet;
import java.util.Set;

public class Role {

private String roleid;
private String rolename;
private Integer ordernum;
private String description;
private Set users = new HashSet();

public Role() {
super();
}

public String getRoleid() {
return roleid;
}

public void setRoleid(String roleid) {
this.roleid = roleid;
}

public String getRolename() {

4000
return rolename;
}

public void setRolename(String rolename) {
this.rolename = rolename;
}

public Integer getOrdernum() {
return ordernum;
}

public void setOrdernum(Integer ordernum) {
this.ordernum = ordernum;
}

public String getDescription() {
return description;
}

public void setDescription(String description) {
this.description = description;
}

public Set getUsers() {
return users;
}

public void setUsers(Set users) {
this.users = users;
}
}

Role.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="cn.qeli.ums.entity.Role" table="Roles">
<id name="roleid" column="roleid" length="32" >
<generator class="uuid.hex"></generator>
</id>
<property name="rolename" length="30" />
<property name="ordernum" />
<property name="description" length="200" />
<set name="users" table="user_role" inverse="true">
<key column="roleid"/>
<many-to-many column="userid" class="cn.qeli.ums.entity.User" />
</set>
</class>
</hibernate-mapping>

hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 2.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">

<hibernate-configuration>

<session-factory>

<!-- properties -->
<!-- 数据库URL -->
<property name="hibernate.connection.url">jdbc:mysql://localhost/onetomany</property>
<!-- 数据库JDBC驱动 -->
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<!-- 数据库用户名 -->
<property name="hibernate.connection.username">root</property>
<!-- 数据库密码 -->
<property name="hibernate.connection.password">hello</property>
<!-- 数据库方言 -->
<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>
<!-- 指定hibernate每次提交的SQL数量  对批量操作的性能提升帮助很大！！！！！！！！！！！！！ -->
<property name="hibernate.jdbc.batch_size">25</property>
<!-- 映射文件配置，配置文件名必须包含其相对于根的全路径 -->
<mapping resource="com/model/TUser.hbm.xml" />
<mapping resource="com/model/TAddress.hbm.xml" />

</session-factory>

</hibernate-configuration>