我真的被困在这里了，我现在很想得到一些帮助。每次我尝试部署时，它总是说它失败了。
编辑：好吧，所以我意识到主要问题似乎是：
Caused by: Exception [EclipseLink-7154] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The attribute [productCollection] in entity class [class entity.Category] has a mappedBy value of [category] which does not exist in its owning entity class [class entity.Product]. If the owning entity class is a @MappedSuperclass, this is invalid, and your attribute should reference the correct subclass.
实体类如下：
类别.java
@Entity
@Table(name = "category")
@NamedQueries({
@NamedQuery(name = "Category.findAll", query = "SELECT c FROM Category c"),
@NamedQuery(name = "Category.findById", query = "SELECT c FROM Category c WHERE c.id = :id"),
@NamedQuery(name = "Category.findByName", query = "SELECT c FROM Category c WHERE c.name = :name")})
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id")
private Short id;
@Basic(optional = false)
@Column(name = "name")
private String name;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "category")
private Collection<Product> productCollection;
public Category() {
}
public Category(Short id) {
this.id = id;
}
public Category(Short id, String name) {
this.id = id;
this.name = name;
}
public Short getId() {
return id;
}
public void setId(Short id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Collection<Product> getProductCollection() {
return productCollection;
}
public void setProductCollection(Collection<Product> productCollection) {
this.productCollection = productCollection;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Category)) {
return false;
}
Category other = (Category) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.Category[id=" + id + "]";
}
}
产品.java
@Entity
@Table(name = "product")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Product.findAll", query = "SELECT p FROM Product p"),
@NamedQuery(name = "Product.findById", query = "SELECT p FROM Product p WHERE p.id = :id"),
@NamedQuery(name = "Product.findByName", query = "SELECT p FROM Product p WHERE p.name = :name"),
@NamedQuery(name = "Product.findByPrice", query = "SELECT p FROM Product p WHERE p.price = :price"),
@NamedQuery(name = "Product.findByDescription", query = "SELECT p FROM Product p WHERE p.description = :description"),
@NamedQuery(name = "Product.findByLastUpdate", query = "SELECT p FROM Product p WHERE p.lastUpdate = :lastUpdate")})
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id")
private Integer id;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 45)
@Column(name = "name")
private String name;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 45)
@Column(name = "price")
private BigDecimal price;
@Size(max = 255)
@Column(name = "description")
private String description;
@Basic(optional = false)
@NotNull
@Column(name = "last_update")
@Temporal(TemporalType.TIMESTAMP)
private Date lastUpdate;
@JoinColumn(name = "category_id", referencedColumnName = "id")
@ManyToOne(optional = false)
private Category categoryId;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "product")
private Collection<OrderedProduct> orderedProductCollection;
public Product() {
}
public Product(Integer id) {
this.id = id;
}
public Product(Integer id, String name, BigDecimal price, Date lastUpdate) {
this.id = id;
this.name = name;
this.price = price;
this.lastUpdate = lastUpdate;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getLastUpdate() {
return lastUpdate;
}
public void setLastUpdate(Date lastUpdate) {
this.lastUpdate = lastUpdate;
}
public Category getCategoryId() {
return categoryId;
}
public void setCategoryId(Category categoryId) {
this.categoryId = categoryId;
}
@XmlTransient
public Collection<OrderedProduct> getOrderedProductCollection() {
return orderedProductCollection;
}
public void setOrderedProductCollection(Collection<OrderedProduct> orderedProductCollection) {
this.orderedProductCollection = orderedProductCollection;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Product)) {
return false;
}
Product other = (Product) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.Product[ id=" + id + " ]";
}
}
请尽快帮我。非常感谢。
我找到了解决方案。
我所要做的就是改变：
@OneToMany(cascade = CascadeType.ALL, mappedBy = "category")
至
@OneToMany(cascade = CascadeType.ALL, mappedBy = "categoryId")
因为在我的Product.java中，类别被提到为：
public Category getCategoryId() {
return categoryId;
}