One-to-Many|Many-to-One(双向+自身)

原文

package com.hibernate.ano.self;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.ManyToOne;import javax.persistence.OneToMany;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;import org.hibernate.annotations.NotFound;import org.hibernate.annotations.NotFoundAction;import com.infohold.icqm.db.dbo.Organization;/** * @ClassName: Group.java * * @Description: 用户组 * * @author GERRARD * * @date 2015年1月26日下午2:22:24 *  */@Entity@Table(name = "group")public class Group implements java.io.Serializable {/** *  */private static final long serialVersionUID = -8694664905284095892L;/** * 主键ID */private String pid;/** * 组名 */private String groupName;/** * 父类(自身  Many-to-One) */private Group parentGroup;/** * 子集(自身  One-to-Many) */private Set<Group> childGroup;/** * 所属机构下用户 */private Set<Users> users;public Group() {}public Group(String pid, String groupName, Group parentGroup,Set<Group> childGroup) {this.pid = pid;this.groupName = groupName;this.parentGroup = parentGroup;this.childGroup = childGroup;}@Id    @Column(name = "pid", unique = true, nullable = false, length = 32)    @GeneratedValue(generator = "generator")    @GenericGenerator(name = "generator", strategy = "uuid")public String getPid() {return pid;}public void setPid(String pid) {this.pid = pid;}@Column(name = "group_name", length = 64)public String getGroupName() {return groupName;}public void setGroupName(String groupName) {this.groupName = groupName;}@ManyToOne  @JoinColumn(name = "parent_id")public Group getParentGroup() {return parentGroup;}public void setParentGroup(Group parentGroup) {this.parentGroup = parentGroup;}@OneToMany(mappedBy = "parentGroup", targetEntity = Organization.class, cascade = CascadeType.ALL)public Set<Group> getChildGroup() {return childGroup;}public void setChildGroup(Set<Group> childGroup) {this.childGroup = childGroup;}@OneToMany(fetch = FetchType.LAZY, mappedBy = "group")    @NotFound(action = NotFoundAction.IGNORE)public Set<Users> getUsers() {return users;}public void setUsers(Set<Users> users) {this.users = users;}}

package com.hibernate.ano.self;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.ManyToOne;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;@Entity@Table(name = "users")public class Users implements java.io.Serializable {/** *  */private static final long serialVersionUID = 1668563130071655650L;/** * 主键ID */private String pid;/** * 用户ID */private String userId;/** * 用户名 */private String userName;/** * 所属机构 */private Group group;public Users() {}public Users(String pid, String userId, String userName, Group group) {this.pid = pid;this.userId = userId;this.userName = userName;this.group = group;}@Id    @Column(name = "pid", unique = true, nullable = false, length = 32)    @GeneratedValue(generator = "generator")    @GenericGenerator(name = "generator", strategy = "uuid")public String getPid() {return pid;}public void setPid(String pid) {this.pid = pid;}@Column(name = "user_id", length = 20)public String getUserId() {return userId;}public void setUserId(String userId) {this.userId = userId;}@Column(name = "user_name", length = 64)public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}@ManyToOne(fetch = FetchType.EAGER)@JoinColumn(name = "group_id")public Group getGroup() {return group;}public void setGroup(Group group) {this.group = group;}}