标签：blog io java ar for div sp on c
要点：BroadLeaf框架下定义ORM对象需要先定义一个接口, 然后在persistence-unit 的配置中进行声明,如不声明会报错：no persistent classes found for query class
IProvince：
import java.io.Serializable;
import javax.annotation.Nonnull;
public interface IProvince extends Serializable{
@Nonnull
public int getProv_Code();
@Nonnull
public String getProv_Name();
}
Province：
import javax.persistence.CascadeType;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import org.hibernate.annotations.Fetch;
import org.hibernate.annotations.FetchMode;
@Entity
@Table(name = "PROVINCE")
@SuppressWarnings("serial")
public class Province implements IProvince,Serializable{
@EmbeddedId
private ProvincePK prov_PK;
@OneToMany(mappedBy = "province", cascade = CascadeType.MERGE, fetch = FetchType.LAZY)
@Fetch(FetchMode.SUBSELECT)
private Set<City> cities;
public int getProv_Code() {
return prov_PK.getProv_Code();
}
public String getProv_Name() {
return prov_PK.getProv_Name();
}
public Set<City> getCities() {
return cities;
}
public void setCities(Set<City> cities) {
this.cities = cities;
}
public ProvincePK getProv_PK() {
return prov_PK;
}
public void setProv_PK(ProvincePK prov_PK) {
this.prov_PK = prov_PK;
}
}
ProvincePK（联合主键类）：
import java.io.Serializable;
import javax.persistence.Embeddable;
@Embeddable
@SuppressWarnings("serial")
public class ProvincePK implements Serializable{
private int prov_Code;
private String prov_Name;
@Override
public boolean equals(Object obj) {
if(obj instanceof ProvincePK){
if(((ProvincePK) obj).getProv_Code() == this.getProv_Code()
&& ((ProvincePK) obj).getProv_Name().equals(this.getProv_Name())){
return true;
}
}
return false;
}
@Override
public int hashCode() {
return prov_Name.hashCode() + prov_Code;
}
public int getProv_Code() {
return prov_Code;
}
public void setProv_Code(int prov_Code) {
this.prov_Code = prov_Code;
}
public String getProv_Name() {
return prov_Name;
}
public void setProv_Name(String prov_Name) {
this.prov_Name = prov_Name;
}
}
ICity：
public interface ICity extends Serializable{
@Nonnull
public int getCity_Code();
@Nonnull
public String getCity_Name();
}
City:
import org.hibernate.annotations.Fetch;
import org.hibernate.annotations.FetchMode;
@Entity
@Table(name = "CITY")
@SuppressWarnings("serial")
public class City implements ICity,Serializable{
@EmbeddedId
private CityPK city_PK;
@OneToMany(mappedBy = "city", cascade = CascadeType.MERGE, fetch = FetchType.LAZY)
@Fetch(FetchMode.SUBSELECT)
private Set<Area> areas;
@ManyToOne
@JoinColumns({@JoinColumn(name = "prov_Code"),@JoinColumn(name = "prov_Name")})
private Province province;
public CityPK getCity_PK() {
return city_PK;
}
public void setCity_PK(CityPK city_PK) {
this.city_PK = city_PK;
}
public Set<Area> getAreas() {
return areas;
}
public void setAreas(Set<Area> areas) {
this.areas = areas;
}
public Province getProvince() {
return province;
}
public void setProvince(Province province) {
this.province = province;
}
@Override
public int getCity_Code() {
return city_PK.getCity_Code();
}
@Override
public String getCity_Name() {
return city_PK.getCity_Name();
}
}
CityPK:
@Embeddable
@SuppressWarnings("serial")
public class CityPK implements Serializable{
private int city_Code;
private String city_Name;
@Override
public boolean equals(Object obj) {
if(obj instanceof ProvincePK){
if(((CityPK) obj).getCity_Code() == this.getCity_Code()
&& ((CityPK) obj).getCity_Name().equals(this.getCity_Name())){
return true;
}
}
return false;
}
@Override
public int hashCode() {
return city_Name.hashCode() + city_Code;
}
public int getCity_Code() {
return city_Code;
}
public void setCity_Code(int city_Code) {
this.city_Code = city_Code;
}
public String getCity_Name() {
return city_Name;
}
public void setCity_Name(String city_Name) {
this.city_Name = city_Name;
}
}
IArea:
public interface IArea extends Serializable{
@Nonnull
public int getArea_Code();
@Nonnull
public String getArea_Name();
}
Area:
@Entity
@Table(name = "CITY_AREA")
@SuppressWarnings("serial")
public class Area implements IArea,Serializable{
@EmbeddedId
private AreaPK area_PK;
@ManyToOne
@JoinColumns({@JoinColumn(name = "city_Code"),@JoinColumn(name = "city_Name")})
private City city;
public AreaPK getArea_PK() {
return area_PK;
}
public void setArea_PK(AreaPK area_PK) {
this.area_PK = area_PK;
}
public City getCity() {
return city;
}
public void setCity(City city) {
this.city = city;
}
@Override
public int getArea_Code() {
return area_PK.getArea_Code();
}
@Override
public String getArea_Name() {
return area_PK.getArea_Name();
}
}
AreaPK:
@Embeddable
@SuppressWarnings("serial")
public class AreaPK implements Serializable{
private int area_Code;
private String area_Name;
@Override
public boolean equals(Object obj) {
if(obj instanceof ProvincePK){
if(((AreaPK) obj).getArea_Code() == this.getArea_Code()
&& ((AreaPK) obj).getArea_Name().equals(this.getArea_Name())){
return true;
}
}
return false;
}
@Override
public int hashCode() {
return area_Name.hashCode() + area_Code;
}
public int getArea_Code() {
return area_Code;
}
public void setArea_Code(int area_Code) {
this.area_Code = area_Code;
}
public String getArea_Name() {
return area_Name;
}
public void setArea_Name(String area_Name) {
this.area_Name = area_Name;
}
}
BroadLeaf 下定义ORM对象：Province，City，Area
标签：blog io java ar for div sp on c
原文地址：http://www.cnblogs.com/youneverdie/p/3987667.html
