全注解配置Hibernate报错！在线等！！！急?报错

第一次使用注解配置Hibernate，但是运行的时候出现了错误。

mappedBy reference an unknown target entity property

网上百度说这种错误是由于one方的mappedBy指定的不对，应该指定的是many方中的one方对象属性。但是我指定的是对的，但是不知道为什么就是错误的。

one方：

package com.bdqn.domain;

import java.io.Serializable;
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.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@SequenceGenerator(name="user_seq",sequenceName="seq_sys_users")
@Table(name="sys_users")
public class Users implements Serializable{
		private Integer usid;
		private String usname;
		private String uspwds;
		private Set lianxirens=new HashSet(0);
		//检查这个属性是否使用了泛型,如:Set<类型>. 
		//如 果未使用泛型,请在OneToMany注释中使用targetEntity指定元素的类型
		
		@Id
		@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="user_seq") //主键生成策略 取决于用什么数据库
		public Integer getUsid() {
			return usid;
		}
		public void setUsid(Integer usid) {
			this.usid = usid;
		}
		public String getUsname() {
			return usname;
		}
		public void setUsname(String usname) {
			this.usname = usname;
		}
		@Column(name="uspwd")
		public String getUspwds() {
			return uspwds;
		}
		public void setUspwds(String uspwds) {
			this.uspwds = uspwds;
		}
		@OneToMany(cascade={CascadeType.ALL},fetch=FetchType.LAZY,mappedBy="user",targetEntity=Users.class)
		public Set getLianxirens() {
			return lianxirens;
		}
		public void setLianxirens(Set lianxirens) {
			this.lianxirens = lianxirens;
		}
		public Users(Integer usid, String usname, String uspwds, Set lianxirens) {
			super();
			this.usid = usid;
			this.usname = usname;
			this.uspwds = uspwds;
			this.lianxirens = lianxirens;
		}
		public Users() {
			super();
		}
}

package com.bdqn.domain;

import java.util.Date;

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.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@SequenceGenerator(name="lianxiren_seq",sequenceName="seq_lianxiren")
@Table(name="lianxiren")
public class Lianxirens {
		private Integer lid;
		private String lname;
		private String phone;
		private Date times;
		private Users user;
		@Id
		@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="lianxiren_seq")
		public Integer getLid() {
			return lid;
		}
		public void setLid(Integer lid) {
			this.lid = lid;
		}
		public String getLname() {
			return lname;
		}
		public void setLname(String lname) {
			this.lname = lname;
		}
		public String getPhone() {
			return phone;
		}
		public void setPhone(String phone) {
			this.phone = phone;
		}
		@Column(nullable=true)
		@Temporal(TemporalType.DATE)  //时间类型
		public Date getTimes() {
			return times;
		}
		public void setTimes(Date times) {
			this.times = times;
		}
		@ManyToOne(cascade={CascadeType.ALL},fetch=FetchType.EAGER,optional=true)
		@JoinColumn(name="usid",insertable=true,updatable=true)
		public Users getUser() {
			return user;
		}
		public void setUser(Users user) {
			this.user = user;
		}
		public Lianxirens(Integer lid, String lname, String phone, Date times,
				Users user) {
			super();
			this.lid = lid;
			this.lname = lname;
			this.phone = phone;
			this.times = times;
			this.user = user;
		}
		public Lianxirens() {
			super();
		}
		
}

请高手看一下，错误出现在了哪？