Hibernate 冬眠——”;外键引用<;表1>;从<;表2>;列的编号错误。应为2“;错误
我一直在寻找这个问题的解决办法。我发现一些帖子讨论了导致这个问题的多对多关系,但我认为这不适用于我的情况,所以我在一个新帖子中发布了这个帖子 我有以下数据库设计:============================================================================== 用户表: PK USER_ID, 用户名唯一, 项目表: 主键项目_ID, FK物料\卖家->与user.user\u ID的多对一关系, FK物料买家->与user.user\u ID的多对一关系, 投标表(用户和项目之间的桥梁): PK BID_ID, FK投标人\u ID->与user.user\u ID的多对一关系, FK ITEM_ID->与ITEM.ITEM_ID的多对一关系, 类别表: PK CAT_ID, 项目\类别表(类别和项目之间的桥梁): 主键项目类别ID, FK ITEM_ID->与ITEM.ITEM_ID的多对一关系, FK CAT_ID->与category.CAT_ID的多对一关系, ============================================================================== 我正试图通过NetBeans使用hibernate进行设置。我找到了一个教程,它指导我设置hibernate.cfg、reveng和util文件,并向我展示了如何使用NetBeans工具生成POJO。在本教程中,您应该右键单击cfg文件并运行HQL查询,以确保一切正常工作。我用一个简单的表(上面的用户表)测试了这个过程,一切都正常。但是,当我尝试将所有内容组合在一起时,我得到以下错误:Hibernate 冬眠——”;外键引用<;表1>;从<;表2>;列的编号错误。应为2“;错误,hibernate,foreign-keys,netbeans-6.9,manytomanyfield,hibernate-onetomany,Hibernate,Foreign Keys,Netbeans 6.9,Manytomanyfield,Hibernate Onetomany,我一直在寻找这个问题的解决办法。我发现一些帖子讨论了导致这个问题的多对多关系,但我认为这不适用于我的情况,所以我在一个新帖子中发布了这个帖子 我有以下数据库设计:============================================================================== 用户表: PK USER_ID, 用户名唯一, 项目表: 主键项目_ID, FK物料\卖家->与user.user\u ID的多对一关系, FK物料买家->与user.user\
org.hibernate.AnnotationException:引用GavelDB.Bid中的GavelDB.User的外键的列数错误。应该是2
位于org.hibernate.cfg.annotations.TableBinder.bindFk(TableBinder.java:276)
在org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:89)上
在org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:499)上
位于org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:304)
位于org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1286)
位于org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
正如我之前所说的,我以前搜索这个问题的所有尝试都指向了复合键,但是我在这个设计中努力避免了它们,所以我不知道这会是什么问题。我不熟悉hibernate,所以我还没有从头开始编写文件的知识库。如果有人能给我一些见解,我将不胜感激。提前谢谢
以下是错误中提到的两个文件,供您参考:
BID.JAVA
package GavelDB;
// Generated Feb 10, 2011 12:41:04 PM by Hibernate Tools 3.2.1.GA
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
* Bid generated by hbm2java
*/
@Entity
@Table(name="bid"
,catalog="gavel1"
)
public class Bid implements java.io.Serializable {
private Integer bidId;
private User user;
private Item item;
private Date bidDate;
private double bidAmt;
private Double bidMax;
public Bid() {
}
public Bid(User user, Item item, Date bidDate, double bidAmt) {
this.user = user;
this.item = item;
this.bidDate = bidDate;
this.bidAmt = bidAmt;
}
public Bid(User user, Item item, Date bidDate, double bidAmt, Double bidMax) {
this.user = user;
this.item = item;
this.bidDate = bidDate;
this.bidAmt = bidAmt;
this.bidMax = bidMax;
}
@Id @GeneratedValue(strategy=IDENTITY)
@Column(name="BID_ID", unique=true, nullable=false)
public Integer getBidId() {
return this.bidId;
}
public void setBidId(Integer bidId) {
this.bidId = bidId;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="BIDDER_ID", nullable=false)
public User getUser() {
return this.user;
}
public void setUser(User user) {
this.user = user;
}
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="ITEM_ID", nullable=false)
public Item getItem() {
return this.item;
}
public void setItem(Item item) {
this.item = item;
}
@Temporal(TemporalType.TIMESTAMP)
@Column(name="BID_DATE", nullable=false, length=19)
public Date getBidDate() {
return this.bidDate;
}
public void setBidDate(Date bidDate) {
this.bidDate = bidDate;
}
@Column(name="BID_AMT", nullable=false, precision=22, scale=0)
public double getBidAmt() {
return this.bidAmt;
}
public void setBidAmt(double bidAmt) {
this.bidAmt = bidAmt;
}
@Column(name="BID_MAX", precision=22, scale=0)
public Double getBidMax() {
return this.bidMax;
}
public void setBidMax(Double bidMax) {
this.bidMax = bidMax;
}
}
ITEM.JAVA
package GavelDB;
// Generated Feb 10, 2011 12:41:04 PM by Hibernate Tools 3.2.1.GA
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 static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
/**
* User generated by hbm2java
*/
@Entity
@Table(name="user"
,catalog="gavel1"
, uniqueConstraints = @UniqueConstraint(columnNames="USER_NAME")
)
public class User implements java.io.Serializable {
private Integer userId;
private String userName;
private String pswd;
private String email;
private String street;
private String city;
private String state;
private Integer zip;
private Integer phone;
private Set<Item> itemsForItemSeller = new HashSet<Item>(0);
private Set<Item> itemsForItemBuyer = new HashSet<Item>(0);
private Set<Bid> bids = new HashSet<Bid>(0);
public User() {
}
public User(String userName) {
this.userName = userName;
}
public User(String userName, String pswd, String email, String street, String city, String state, Integer zip, Integer phone, Set<Item> itemsForItemSeller, Set<Item> itemsForItemBuyer, Set<Bid> bids) {
this.userName = userName;
this.pswd = pswd;
this.email = email;
this.street = street;
this.city = city;
this.state = state;
this.zip = zip;
this.phone = phone;
this.itemsForItemSeller = itemsForItemSeller;
this.itemsForItemBuyer = itemsForItemBuyer;
this.bids = bids;
}
@Id @GeneratedValue(strategy=IDENTITY)
@Column(name="USER_ID", unique=true, nullable=false)
public Integer getUserId() {
return this.userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
@Column(name="USER_NAME", unique=true, nullable=false)
public String getUserName() {
return this.userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
@Column(name="PSWD", length=30)
public String getPswd() {
return this.pswd;
}
public void setPswd(String pswd) {
this.pswd = pswd;
}
@Column(name="EMAIL")
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email;
}
@Column(name="STREET")
public String getStreet() {
return this.street;
}
public void setStreet(String street) {
this.street = street;
}
@Column(name="CITY")
public String getCity() {
return this.city;
}
public void setCity(String city) {
this.city = city;
}
@Column(name="STATE")
public String getState() {
return this.state;
}
public void setState(String state) {
this.state = state;
}
@Column(name="ZIP")
public Integer getZip() {
return this.zip;
}
public void setZip(Integer zip) {
this.zip = zip;
}
@Column(name="PHONE")
public Integer getPhone() {
return this.phone;
}
public void setPhone(Integer phone) {
this.phone = phone;
}
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="userByItemSeller")
public Set<Item> getItemsForItemSeller() {
return this.itemsForItemSeller;
}
public void setItemsForItemSeller(Set<Item> itemsForItemSeller) {
this.itemsForItemSeller = itemsForItemSeller;
}
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="userByItemBuyer")
public Set<Item> getItemsForItemBuyer() {
return this.itemsForItemBuyer;
}
public void setItemsForItemBuyer(Set<Item> itemsForItemBuyer) {
this.itemsForItemBuyer = itemsForItemBuyer;
}
@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="user")
public Set<Bid> getBids() {
return this.bids;
}
public void setBids(Set<Bid> bids) {
this.bids = bids;
}
}
package GavelDB;
//Hibernate Tools 3.2.1.GA于2011年2月10日12:41:04下午生成
导入java.util.HashSet;
导入java.util.Set;
导入javax.persistence.CascadeType;
导入javax.persistence.Column;
导入javax.persistence.Entity;
导入javax.persistence.FetchType;
导入javax.persistence.GeneratedValue;
导入静态javax.persistence.GenerationType.IDENTITY;
导入javax.persistence.Id;
导入javax.persistence.OneToMany;
导入javax.persistence.Table;
导入javax.persistence.UniqueConstraint;
/**
*由hbm2java生成的用户
*/
@实体
@表(name=“user”
,catalog=“gavel1”
,uniqueConstraints=@UniqueConstraint(columnNames=“USER\u NAME”)
)
公共类用户实现java.io.Serializable{
私有整数用户标识;
私有字符串用户名;
私有字符串pswd;
私人字符串电子邮件;
私家弦街;;
私人城市;
私有字符串状态;
私有整数压缩;
专用整数电话;
私有集itemsForItemSeller=新哈希集(0);
私有集itemsForItemBuyer=新哈希集(0);
私有集出价=新哈希集(0);
公共用户(){
}
公共用户(字符串用户名){
this.userName=用户名;
}
公共用户(字符串用户名、字符串pswd、字符串电子邮件、字符串街道、字符串城市、字符串状态、整数zip、整数电话、Set itemsForItemSeller、Set itemsForItemBuyer、Set bids){
this.userName=用户名;
this.pswd=pswd;
this.email=电子邮件;
这条街;
this.city=城市;
this.state=状态;
this.zip=zip;
this.phone=电话;
this.itemsForItemSeller=itemsForItemSeller;
this.itemsForItemBuyer=itemsForItemBuyer;
此参数为:投标=投标;
}
@Id@GeneratedValue(策略=标识)
@列(name=“USER\u ID”,unique=true,nullable=false)
公共整数getUserId(){
返回this.userId;
}
public void setUserId(整数userId){
this.userId=userId;
}
@列(name=“USER\u name”,unique=true,nullable=false)
公共字符串getUserName(){
返回此用户名;
}
public void setUserName(字符串用户名){
this.userName=用户名;
}
@列(name=“PSWD”,长度=30)
公共字符串getPswd(){
返回此.pswd;
}
公共void setPswd(字符串pswd){
this.pswd=pswd;
}
@列(name=“EMAIL”)
公共字符串getEmail(){
返回此电子邮件;
}
公用电子邮件(字符串电子邮件){
this.email=电子邮件;
}
@列(name=“STREET”)
公共字符串getStreet(){
返回这条街;
}
公共街道(字符串街){
这条街;
}
@列(name=“CITY”)
公共字符串getCity(){
返回这个城市;
}
公共城市(字符串城市){
this.city=城市;
}
@列(name=“STATE”)
公共字符串getState(){
返回此.state;
}