Hibernate Annotation Many2ManyUnidirectAssociationJoin

Member

package com.todd.bean;

import java.io.Serializable;
import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;


@Entity
@Table(name = "many2many_unidirect_association_join_member")
public class Many2ManyUnidirectAssociationJoinMember implements Serializable{

    private int memberId;
    private String userId;
    private String userName;
    private String memberDesc;

    private List skillList;
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "member_id")    
    public int getMemberId() {
        return memberId;
    }
    public void setMemberId(int memberId) {
        this.memberId = memberId;
    }
    
    @Column(name = "user_id")
    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
    
    @Column(name = "user_name")
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    
    @Column(name = "member_desc")
    public String getMemberDesc() {
        return memberDesc;
    }
    public void setMemberDesc(String memberDesc) {
        this.memberDesc = memberDesc;
    }

    
    @ManyToMany
    @JoinTable(name = "many2many_unidirect_association_join_member_skill",
        joinColumns = {
            @JoinColumn(name="fk_member_id")           
        },
        inverseJoinColumns = {
            @JoinColumn(name="fk_skill_id")
        }
    )
    public List getSkillList() {
        return skillList;
    }
    public void setSkillList(List skillList) {
        this.skillList = skillList;
    }    
}

Skill

package com.todd.bean;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;


@Entity
@Table(name = "many2many_unidirect_association_join_skill")
public class Many2ManyUnidirectAssociationJoinSkill implements Serializable{

    private int skillId;
    private String userId;
    private String skill;
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "skill_id")    
    public int getSkillId() {
        return skillId;
    }
    public void setSkillId(int skillId) {
        this.skillId = skillId;
    }
    
    @Column(name = "user_id")
    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }

    @Column(name = "skill")
    public String getSkill() {
        return skill;
    }
    public void setSkill(String skill) {
        this.skill = skill;
    }
}

Test

package com.todd.bean;

import java.util.ArrayList;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;

import junit.framework.TestCase;

import com.todd.HibernateAnnotationHelper;

/**
 * 1.多對多的意義是?
 * 2.
 * @author Todd
 */
public class Many2ManyUnidirectAssociationJoinMyTestCaseA extends TestCase {


    public void test(){
        
        Session session = HibernateAnnotationHelper.getSessionFactory().openSession();        
        Transaction tx = session.beginTransaction();

        Many2ManyUnidirectAssociationJoinMember member1 = new Many2ManyUnidirectAssociationJoinMember();
        member1.setUserId("ots520");
        member1.setUserName("ots520");
        member1.setMemberDesc("ots520 desc");
        
        Many2ManyUnidirectAssociationJoinMember member2 = new Many2ManyUnidirectAssociationJoinMember();
        member2.setUserId("todd");
        member2.setUserName("todd name");
        member2.setMemberDesc("todd desc");

        
        List skillList = new ArrayList();
        
        Many2ManyUnidirectAssociationJoinSkill skill1 = new Many2ManyUnidirectAssociationJoinSkill();
        skill1.setUserId("none");
        skill1.setSkill("skill1");
        session.save(skill1);
        skillList.add(skill1);
        
        Many2ManyUnidirectAssociationJoinSkill skill2 = new Many2ManyUnidirectAssociationJoinSkill();
        skill2.setUserId("none");
        skill2.setSkill("skill2");
        session.save(skill2);
        skillList.add(skill2);

        
        member1.setSkillList(skillList);
        member2.setSkillList(skillList);
        session.save(member1);
        session.save(member2);
        
        tx.commit();
        session.close();        
        
    }
}