Hibernate 注解和配置文件两种方法的对比（有实例）

hibernate多对多形式（User类<---->Educate类）

1.基于注解的形式：

User类：

package com.ssh.entities;

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

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;

@Entity
@Table(name="user")
public class User {
@Id
@Column(name="id")
@GeneratedValue
private Long id;//员工编号

@Column(name="name")
private String name;//员工用户名

@Column(name="password")
private String password;//登录密码

@Column(name="sex")
private Byte sex;//性别

@Column(name="birthday")
private Date birthday;//生日

@Column(name="createtime")
private Date createtime;//创建时间

@Column(name="isadmin")
private Byte isadmin;//是否为管理员

@Column(name="content")
private String content;//人员简介

@ManyToMany(targetEntity=com.ssh.entities.Educate.class,cascade=CascadeType.ALL,
fetch=FetchType.EAGER)
@JoinTable(
name="user_educate",
joinColumns={@JoinColumn(name="user_id")},
inverseJoinColumns={@JoinColumn(name="educate_id")}
)
private Set<Educate> educate=new HashSet<Educate>();
public Set<Educate> getEducate() {
return educate;
}
public void setEducate(Set<Educate> educate) {
this.educate = educate;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Byte getSex() {
return sex;
}
public void setSex(Byte sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public Byte getIsadmin() {
return isadmin;
}
public void setIsadmin(Byte isadmin) {
this.isadmin = isadmin;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public User(Long id, String name, String password, Byte sex, Date birthday,
Date createtime, Byte isadmin, String content) {
this.id = id;
this.name = name;
this.password = password;
this.sex = sex;
this.birthday = birthday;
this.createtime = createtime;
this.isadmin = isadmin;
this.content = content;
}
public User() {
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password
+ ", sex=" + sex + ", birthday=" + birthday + ", createtime="
+ createtime + ", isadmin=" + isadmin + ", content=" + content
+ "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}

}

Educate类：

package com.ssh.entities;

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

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.persistence.Table;

@Entity
@Table(name="educate")
public class Educate {
@Id
@Column(name="id")
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;//培训标号

@Column(name="name")
private String name;//培训名称

@Column(name="purpose")
private String purpose;//培训目的

@Column(name="begintime")
private Date begintime;//培训开始时间

@Column(name="endtime")
private Date endtime;//培训结束时间

@Column(name="datum")
private String datum;//培训材料

@Column(name="teacher")
private String teacher;//培训讲师

@Column(name="student")
private String student;//培训人员

@Column(name="createtime")
private Date createtime;//创建时间

@Column(name="educate")
private Byte educate;//培训是否完成

@Column(name="effect")
private String effect;//培训效果

@Column(name="summarize")
private String summarize;//培训总结

@ManyToMany(mappedBy="educate",cascade=CascadeType.ALL,fetch=FetchType.LAZY)
private Set<User> user=new HashSet<User>();

public Set<User> getUser() {
return user;
}
public void setUser(Set<User> user) {
this.user = user;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPurpose() {
return purpose;
}
public void setPurpose(String purpose) {
this.purpose = purpose;
}
public Date getBegintime() {
return begintime;
}
public void setBegintime(Date begintime) {
this.begintime = begintime;
}
public Date getEndtime() {
return endtime;
}
public void setEndtime(Date endtime) {
this.endtime = endtime;
}
public String getDatum() {
return datum;
}
public void setDatum(String datum) {
this.datum = datum;
}
public String getTeacher() {
return teacher;
}
public void setTeacher(String teacher) {
this.teacher = teacher;
}
public String getStudent() {
return student;
}
public void setStudent(String student) {
this.student = student;
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public Byte getEducate() {
return educate;
}
public void setEducate(Byte educate) {
this.educate = educate;
}
public String getEffect() {
return effect;
}
public void setEffect(String effect) {
this.effect = effect;
}
public String getSummarize() {
return summarize;
}
public void setSummarize(String summarize) {
this.summarize = summarize;
}
public Educate(Long id, String name, String purpose, Date begintime,
Date endtime, String datum, String teacher, String student,
Date createtime, Byte educate, String effect, String summarize) {
this.id = id;
this.name = name;
this.purpose = purpose;
this.begintime = begintime;
this.endtime = endtime;
this.datum = datum;
this.teacher = teacher;
this.student = student;
this.createtime = createtime;
this.educate = educate;
this.effect = effect;
this.summarize = summarize;
}
public Educate() {
}
@Override
public String toString() {
return "Educate [id=" + id + ", name=" + name + ", purpose=" + purpose
+ ", begintime=" + begintime + ", endtime=" + endtime
+ ", datum=" + datum + ", teacher=" + teacher + ", student="
+ student + ", createtime=" + createtime + ", educate="
+ educate + ", effect=" + effect + ", summarize=" + summarize
+ "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Educate other = (Educate) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}

}

需要注意的是，如果是通过spring管理的话，需要在applicationContext.xml文件中的<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">中，配置

<property name="packagesToScan" value="com.ssh.entities"></property>

2.基于配置文件的形式：

需要注意的是，如果是通过spring管理的话，需要在applicationContext.xml文件中的<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">中，配置

<property name="mappingLocations" value="classpath:com/ssh/entities/*.hbm.xml"></property>

User类：

package com.ssh.entities;

import java.io.Serializable;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

public class User {
private Long id;//员工编号
private String name;//员工用户名
private String password;//登录密码
private Byte sex;//性别
private Date birthday;//生日
private Date createtime;//创建时间
private Byte isadmin;//是否为管理员
private String content;//人员简介
private Set<Educate> educate=new HashSet<Educate>();
public Set<Educate> getEducate() {
return educate;
}
public void setEducate(Set<Educate> educate) {
this.educate = educate;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Byte getSex() {
return sex;
}
public void setSex(Byte sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public Byte getIsadmin() {
return isadmin;
}
public void setIsadmin(Byte isadmin) {
this.isadmin = isadmin;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public User(Long id, String name, String password, Byte sex, Date birthday,
Date createtime, Byte isadmin, String content) {
this.id = id;
this.name = name;
this.password = password;
this.sex = sex;
this.birthday = birthday;
this.createtime = createtime;
this.isadmin = isadmin;
this.content = content;
}
public User() {
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password
+ ", sex=" + sex + ", birthday=" + birthday + ", createtime="
+ createtime + ", isadmin=" + isadmin + ", content=" + content
+ "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}

}

Educate类：

package com.ssh.entities;

import java.io.Serializable;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

public class Educate {
private Long id;//培训标号
private String name;//培训名称
private String purpose;//培训目的
private Date begintime;//培训开始时间
private Date endtime;//培训结束时间
private String datum;//培训材料
private String teacher;//培训讲师
private String student;//培训人员
private Date createtime;//创建时间
private Byte educate;//培训是否完成
private String effect;//培训效果
private String summarize;//培训总结
private Set<User> user=new HashSet<User>();

public Set<User> getUser() {
return user;
}
public void setUser(Set<User> user) {
this.user = user;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPurpose() {
return purpose;
}
public void setPurpose(String purpose) {
this.purpose = purpose;
}
public Date getBegintime() {
return begintime;
}
public void setBegintime(Date begintime) {
this.begintime = begintime;
}
public Date getEndtime() {
return endtime;
}
public void setEndtime(Date endtime) {
this.endtime = endtime;
}
public String getDatum() {
return datum;
}
public void setDatum(String datum) {
this.datum = datum;
}
public String getTeacher() {
return teacher;
}
public void setTeacher(String teacher) {
this.teacher = teacher;
}
public String getStudent() {
return student;
}
public void setStudent(String student) {
this.student = student;
}
public Date getCreatetime() {
return createtime;
}
public void setCreatetime(Date createtime) {
this.createtime = createtime;
}
public Byte getEducate() {
return educate;
}
public void setEducate(Byte educate) {
this.educate = educate;
}
public String getEffect() {
return effect;
}
public void setEffect(String effect) {
this.effect = effect;
}
public String getSummarize() {
return summarize;
}
public void setSummarize(String summarize) {
this.summarize = summarize;
}
public Educate(Long id, String name, String purpose, Date begintime,
Date endtime, String datum, String teacher, String student,
Date createtime, Byte educate, String effect, String summarize) {
this.id = id;
this.name = name;
this.purpose = purpose;
this.begintime = begintime;
this.endtime = endtime;
this.datum = datum;
this.teacher = teacher;
this.student = student;
this.createtime = createtime;
this.educate = educate;
this.effect = effect;
this.summarize = summarize;
}
public Educate() {
}
@Override
public String toString() {
return "Educate [id=" + id + ", name=" + name + ", purpose=" + purpose
+ ", begintime=" + begintime + ", endtime=" + endtime
+ ", datum=" + datum + ", teacher=" + teacher + ", student="
+ student + ", createtime=" + createtime + ", educate="
+ educate + ", effect=" + effect + ", summarize=" + summarize
+ "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Educate other = (Educate) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}

}

User.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">
<hibernate-mapping>
<class name="com.ssh.entities.User" table="user">
<id column="id" name="id" type="java.lang.Long">
<generator class="native"></generator>
</id>
<property name="name" length="50" type="java.lang.String"/>
<property name="password" length="50" type="java.lang.String"/>
<property name="sex" length="4" type="java.lang.Byte"/>
<property name="birthday" length="23" type="java.util.Date"/>
<property name="createtime" length="23"  type="java.util.Date"/>
<property name="isadmin" length="4" type="java.lang.Byte"/>
<property name="content" length="2000" type="java.lang.String"/>
<set name="educate" table="user_educate" lazy="false" cascade="all" inverse="false">
<key column="user_id"></key>
<many-to-many class="com.ssh.entities.Educate" column="educate_id"></many-to-many>
</set>
</class>
</hibernate-mapping>

Educate.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">
<hibernate-mapping>
<class name="com.ssh.entities.Educate" table="educate">
<id column="id" name="id" type="java.lang.Long">
<generator class="native"></generator>
</id>
<property name="name" length="100" type="java.lang.String"></property>
<property name="purpose" length="500" type="java.lang.String"/>
<property name="begintime" length="23" type="java.util.Date"/>
<property name="endtime" length="23" type="java.util.Date"/>
<property name="datum" length="2000" type="java.lang.String"/>
<property name="teacher" length="50" type="java.lang.String"/>
<property name="student" length="50" type="java.lang.String"/>
<property name="createtime" length="23" type="java.util.Date"/>
<property name="effect" length="500" type="java.lang.String"/>
<property name="educate" length="1" type="java.lang.Byte"/>
<property name="summarize" length="2000" type="java.lang.String"/>
<set name="user" table="user_educate" lazy="true" cascade="all" inverse="true">
<key column="educate_id"></key>
<many-to-many class="com.ssh.entities.User" column="user_id"></many-to-many>
</set>
</class>
</hibernate-mapping>