hibernate自关联问题

比如我要定义一个用户实体，如User。在这个用户实体里面，我想要定义用户的好友、黑名单和关注对象。于是我用了Set<User>的方式，然后在配置文件中使用了<Set>的配置，Set内使用many-to-many方式。我的目的就是让User自关联对多对，生成一个中间表，如User_friends。这样一来在运行的时候没问题，能生成所有预想的表，且能插入数据到User_INFO（User对应的表）中，但无论如何都不能将数据写入到对多对的关联表中。请高手们赐教，感谢不尽。



package org.fantasizer.blog.core.entity;

import java.io.Serializable;

import java.util.Date;

import java.util.Set;

/**

[CN]用户实体
@author Marco Jee
@date 2010-11-1
*/
@SuppressWarnings("serial")
public class User implements Serializable {

// ----------------------Instance Variables---------------------------//
private Long id;// primary key
private String loginname;// 登录名
private String nickname;// 昵称
private String password;// 密码MD5码
private String email;// email
private Date birthdate;// 生日
private String gender;// 性别
private String marriage;// 婚姻状况
private String msn;// msn
private String qq;// qq
private String phone;// 电话号码
private String realname;// 真实姓名
private String country;// 国家
private String address;// 地址
private String birthplace;// 出生地
private String schoolname;
private String strongSuit;// 特长
private String personalSign;// 个性签名
private Date lastLoginTime;// 上次登录时间
private Date lastLogoutTime;// 上次注销时间
private Date registerTime;// 注册时间
private Date loginTime;// 本次登录时间
private Integer loginCount;// 登录次数
private String lastIp;// 上次登录IP
private String ip;// 本次登录IP
private Boolean disabled;// 是否可用
private String picture;// 头像路径

private Set<User> friends;// 好友
private Set<User> attentions;// 关注对象
private Set<User> blcaklist;// 黑名单

// ----------------------Getters and Setters---------------------------//
//Getters和Setters以及equals与hashCode方法由于太长，在此省略
}

<?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="org.fantasizer.blog.core.entity">
<class name="User" table="user_info" lazy="false">
<id name="id" column="userid">
<generator class="native" />
</id>
<property name="loginname" column="loginname" type="string"
length="20" unique="true" not-null="true" />
<property name="nickname" column="nickname" type="string"
length="20" not-null="true" />
<property name="password" column="password" type="string"
length="50" not-null="true" />
<property name="email" column="email" type="string" length="50"
not-null="true" unique="true" />
<property name="birthdate" column="birthdate" type="date" />
<property name="gender" column="gender" type="string" length="6" />
<property name="marriage" column="marriage" type="string"
length="6" />
<property name="msn" column="msn" type="string" length="50" />
<property name="qq" column="qq" type="string" length="50" />
<property name="phone" column="phone" type="string" length="15" />
<property name="realname" column="realname" type="string"
length="50" />
<property name="country" column="country" type="string"
length="50" />
<property name="address" column="address" type="string"
length="100" />
<property name="birthplace" column="birthplace" type="string"
length="100" />
<property name="schoolname" column="schoolname" type="string"
length="50" />
<property name="strongSuit" column="strongSuit" type="string"
length="200" />
<property name="personalSign" column="personalSign" type="string"
length="200" />
<property name="lastLoginTime" column="lastLoginTime" type="timestamp" />
<property name="lastLogoutTime" column="lastLogoutTime" type="timestamp" />
<property name="registerTime" column="registerTime" type="timestamp" />
<property name="loginTime" column="loginTime" type="timestamp" />
<property name="loginCount" column="loginCount" type="java.lang.Integer" />
<property name="lastIp" column="lastIp" type="string" length="15" />
<property name="ip" column="ip" type="string" length="15" />
<property name="disabled" column="disabled" type="boolean" />
<property name="picture" column="picture" type="string"
length="100" />

    &lt;set name="friends" inverse="true" table="user_friends" lazy="false"&gt;
        &lt;key column="userid" /&gt;
        &lt;many-to-many class="User" column="friendid" /&gt;
    &lt;/set&gt;
    &lt;set name="attentions" inverse="true" table="User_attentions"&gt;
        &lt;key column="userid" /&gt;
        &lt;many-to-many class="User" column="attentionid" /&gt;
    &lt;/set&gt;
    &lt;set name="blcaklist" inverse="true" table="user_blacklist"&gt;
        &lt;key column="userid" /&gt;
        &lt;many-to-many class="User" column="blcaklistid" /&gt;
    &lt;/set&gt;
&lt;/class&gt;

</hibernate-mapping>

另外补充一下，使用Hibernate的时候，想UserRelationship这样的类能不能当成实体？即表达的不是独立的实体，而是表示实体与实体之间关系的，谢谢各位~
问题补充

txc_tang 写道

帮你写了一个Annotation的实体类，映射关系劳烦你自己转换下，希望对你有用，呵呵

package com.bebig.shopping.model;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
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.Table;

@Entity
@Table(name = "tbl_QQUser")
public class QQUser {
    private Long id;// primary key
    private String loginname;// 登录名
    private String nickname;// 昵称
    private String password;// 密码MD5码
    private String email;// email
    private Date birthdate;// 生日
    private String gender;// 性别
    private String marriage;// 婚姻状况
    private String msn;// msn
    private String qq;// qq
    private String phone;// 电话号码
    private String realname;// 真实姓名
    private String country;// 国家
    private String address;// 地址
    private String birthplace;// 出生地
    private String schoolname;
    private String strongSuit;// 特长
    private String personalSign;// 个性签名
    private Date lastLoginTime;// 上次登录时间
    private Date lastLogoutTime;// 上次注销时间
    private Date registerTime;// 注册时间
    private Date loginTime;// 本次登录时间
    private Integer loginCount;// 登录次数
    private String lastIp;// 上次登录IP
    private String ip;// 本次登录IP
    private Boolean disabled;// 是否可用
    private String picture;// 头像路径

    private Set<QQUser> friends = new HashSet<QQUser>();// 好友
    private Set<QQUser> attentions= new HashSet<QQUser>();// 关注对象
    private Set<QQUser> blcaklist= new HashSet<QQUser>();// 黑名单

    public String getAddress() {
        return address;
    }
    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndAttentions", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "attentionId") })
    public Set<QQUser> getAttentions() {
        return attentions;
    }

    public Date getBirthdate() {
        return birthdate;
    }

    public String getBirthplace() {
        return birthplace;
    }
    
    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndBlcaklist", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "blcaklistId") })
    public Set<QQUser> getBlcaklist() {
        return blcaklist;
    }

    public String getCountry() {
        return country;
    }

    public Boolean getDisabled() {
        return disabled;
    }

    public String getEmail() {
        return email;
    }

    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndFriends", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "friendId") })
    public Set<QQUser> getFriends() {
        return friends;
    }

    public String getGender() {
        return gender;
    }

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }

    public String getIp() {
        return ip;
    }

    public String getLastIp() {
        return lastIp;
    }

    public Date getLastLoginTime() {
        return lastLoginTime;
    }

    public Date getLastLogoutTime() {
        return lastLogoutTime;
    }

    public Integer getLoginCount() {
        return loginCount;
    }

    public String getLoginname() {
        return loginname;
    }

    public Date getLoginTime() {
        return loginTime;
    }

    public String getMarriage() {
        return marriage;
    }

    public String getMsn() {
        return msn;
    }

    public String getNickname() {
        return nickname;
    }

    public String getPassword() {
        return password;
    }

    public String getPersonalSign() {
        return personalSign;
    }

    public String getPhone() {
        return phone;
    }

    public String getPicture() {
        return picture;
    }

    public String getQq() {
        return qq;
    }

    public String getRealname() {
        return realname;
    }

    public Date getRegisterTime() {
        return registerTime;
    }

    public String getSchoolname() {
        return schoolname;
    }

    public String getStrongSuit() {
        return strongSuit;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public void setAttentions(Set<QQUser> attentions) {
        this.attentions = attentions;
    }

    public void setBirthdate(Date birthdate) {
        this.birthdate = birthdate;
    }

    public void setBirthplace(String birthplace) {
        this.birthplace = birthplace;
    }

    public void setBlcaklist(Set<QQUser> blcaklist) {
        this.blcaklist = blcaklist;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public void setDisabled(Boolean disabled) {
        this.disabled = disabled;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setFriends(Set<QQUser> friends) {
        this.friends = friends;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public void setIp(String ip) {
        this.ip = ip;
    }

    public void setLastIp(String lastIp) {
        this.lastIp = lastIp;
    }

    public void setLastLoginTime(Date lastLoginTime) {
        this.lastLoginTime = lastLoginTime;
    }

    public void setLastLogoutTime(Date lastLogoutTime) {
        this.lastLogoutTime = lastLogoutTime;
    }

    public void setLoginCount(Integer loginCount) {
        this.loginCount = loginCount;
    }

    public void setLoginname(String loginname) {
        this.loginname = loginname;
    }

    public void setLoginTime(Date loginTime) {
        this.loginTime = loginTime;
    }

    public void setMarriage(String marriage) {
        this.marriage = marriage;
    }

    public void setMsn(String msn) {
        this.msn = msn;
    }

    public void setNickname(String nickname) {
        this.nickname = nickname;
    }

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

    public void setPersonalSign(String personalSign) {
        this.personalSign = personalSign;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public void setPicture(String picture) {
        this.picture = picture;
    }

    public void setQq(String qq) {
        this.qq = qq;
    }

    public void setRealname(String realname) {
        this.realname = realname;
    }

    public void setRegisterTime(Date registerTime) {
        this.registerTime = registerTime;
    }

    public void setSchoolname(String schoolname) {
        this.schoolname = schoolname;
    }

    public void setStrongSuit(String strongSuit) {
        this.strongSuit = strongSuit;
    }
}

哥们儿，非常感谢你的回复。不过我对Annotation理解不深呀，只有继续坐等了。。

在此感谢~~

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2条回答

surechun 2010-11-03 09:36

关注

帮你写了一个Annotation的实体类，映射关系劳烦你自己转换下，希望对你有用，呵呵

package com.bebig.shopping.model;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
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.Table;

@Entity
@Table(name = "tbl_QQUser")
public class QQUser {
    private Long id;// primary key
    private String loginname;// 登录名
    private String nickname;// 昵称
    private String password;// 密码MD5码
    private String email;// email
    private Date birthdate;// 生日
    private String gender;// 性别
    private String marriage;// 婚姻状况
    private String msn;// msn
    private String qq;// qq
    private String phone;// 电话号码
    private String realname;// 真实姓名
    private String country;// 国家
    private String address;// 地址
    private String birthplace;// 出生地
    private String schoolname;
    private String strongSuit;// 特长
    private String personalSign;// 个性签名
    private Date lastLoginTime;// 上次登录时间
    private Date lastLogoutTime;// 上次注销时间
    private Date registerTime;// 注册时间
    private Date loginTime;// 本次登录时间
    private Integer loginCount;// 登录次数
    private String lastIp;// 上次登录IP
    private String ip;// 本次登录IP
    private Boolean disabled;// 是否可用
    private String picture;// 头像路径

    private Set<QQUser> friends = new HashSet<QQUser>();// 好友
    private Set<QQUser> attentions= new HashSet<QQUser>();// 关注对象
    private Set<QQUser> blcaklist= new HashSet<QQUser>();// 黑名单

    public String getAddress() {
        return address;
    }
    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndAttentions", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "attentionId") })
    public Set<QQUser> getAttentions() {
        return attentions;
    }

    public Date getBirthdate() {
        return birthdate;
    }

    public String getBirthplace() {
        return birthplace;
    }
    
    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndBlcaklist", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "blcaklistId") })
    public Set<QQUser> getBlcaklist() {
        return blcaklist;
    }

    public String getCountry() {
        return country;
    }

    public Boolean getDisabled() {
        return disabled;
    }

    public String getEmail() {
        return email;
    }

    @ManyToMany(cascade={CascadeType.ALL})
    @JoinTable(name = "tbl_QQUserAndFriends", joinColumns = { @JoinColumn(name = "userId") }, inverseJoinColumns = { @JoinColumn(name = "friendId") })
    public Set<QQUser> getFriends() {
        return friends;
    }

    public String getGender() {
        return gender;
    }

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }

    public String getIp() {
        return ip;
    }

    public String getLastIp() {
        return lastIp;
    }

    public Date getLastLoginTime() {
        return lastLoginTime;
    }

    public Date getLastLogoutTime() {
        return lastLogoutTime;
    }

    public Integer getLoginCount() {
        return loginCount;
    }

    public String getLoginname() {
        return loginname;
    }

    public Date getLoginTime() {
        return loginTime;
    }

    public String getMarriage() {
        return marriage;
    }

    public String getMsn() {
        return msn;
    }

    public String getNickname() {
        return nickname;
    }

    public String getPassword() {
        return password;
    }

    public String getPersonalSign() {
        return personalSign;
    }

    public String getPhone() {
        return phone;
    }

    public String getPicture() {
        return picture;
    }

    public String getQq() {
        return qq;
    }

    public String getRealname() {
        return realname;
    }

    public Date getRegisterTime() {
        return registerTime;
    }

    public String getSchoolname() {
        return schoolname;
    }

    public String getStrongSuit() {
        return strongSuit;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public void setAttentions(Set<QQUser> attentions) {
        this.attentions = attentions;
    }

    public void setBirthdate(Date birthdate) {
        this.birthdate = birthdate;
    }

    public void setBirthplace(String birthplace) {
        this.birthplace = birthplace;
    }

    public void setBlcaklist(Set<QQUser> blcaklist) {
        this.blcaklist = blcaklist;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public void setDisabled(Boolean disabled) {
        this.disabled = disabled;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setFriends(Set<QQUser> friends) {
        this.friends = friends;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public void setIp(String ip) {
        this.ip = ip;
    }

    public void setLastIp(String lastIp) {
        this.lastIp = lastIp;
    }

    public void setLastLoginTime(Date lastLoginTime) {
        this.lastLoginTime = lastLoginTime;
    }

    public void setLastLogoutTime(Date lastLogoutTime) {
        this.lastLogoutTime = lastLogoutTime;
    }

    public void setLoginCount(Integer loginCount) {
        this.loginCount = loginCount;
    }

    public void setLoginname(String loginname) {
        this.loginname = loginname;
    }

    public void setLoginTime(Date loginTime) {
        this.loginTime = loginTime;
    }

    public void setMarriage(String marriage) {
        this.marriage = marriage;
    }

    public void setMsn(String msn) {
        this.msn = msn;
    }

    public void setNickname(String nickname) {
        this.nickname = nickname;
    }

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

    public void setPersonalSign(String personalSign) {
        this.personalSign = personalSign;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public void setPicture(String picture) {
        this.picture = picture;
    }

    public void setQq(String qq) {
        this.qq = qq;
    }

    public void setRealname(String realname) {
        this.realname = realname;
    }

    public void setRegisterTime(Date registerTime) {
        this.registerTime = registerTime;
    }

    public void setSchoolname(String schoolname) {
        this.schoolname = schoolname;
    }

    public void setStrongSuit(String strongSuit) {
        this.strongSuit = strongSuit;
    }
}

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建立对SQL语句的映射是Hibernate框架操作数据库的主要手段,这里我们列举实例来为大家讲解Java的Hibernate框架中一对多的单向和双向关联映射
深入解析Java的Hibernate框架中的一对一关联映射
2020-09-02 23:30

主要介绍了Java的Hibernate框架的一对一关联映射,包括对一对一外联映射的讲解,需要的朋友可以参考下
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