欢乐极客 2010-11-03 09:36
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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 默认 最新
 
 
  •    
    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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    Hibernate是一个开源的对象关系映射（ORM）框架，它在Java编程领域中被广泛使用，以简化数据库操作。这个“hibernate.rar”压缩包显然包含了与Hibernate相关的项目资源，非常适合那些想要深入理解或学习Hibernate的...
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     Hibernate关联映射.rar
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    本教程“Hibernate关联映射.rar”聚焦于Hibernate中的关联映射，特别是多对一和一对多的关系映射，非常适合初学者了解和实践。  首先，我们要理解什么是关联映射。在数据库中，表与表之间存在各种关系，如一对一、一...
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     Hibernate 参数校验之关联数据校验
     2022-09-10 17:51
     
    lvhui321的博客  Hibernate 参数校验之关联数据校验
     
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      没有解决我的问题,
      去提问