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>