Orgnization.java
package com.chk.model;import java.util.HashSet;
import java.util.Set;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;@Entity
public class Orgnization {
private int id;
private String name;
private String sn;
private String description;
private Orgnization parent;// 父节点
private Set<Person> persons = new HashSet<Person>();// 子节点 @Id
@GeneratedValue
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSn() {
return sn;
} public void setSn(String sn) {
this.sn = sn;
} public String getDescription() {
return description;
} public void setDescription(String description) {
this.description = description;
} @ManyToOne
public Orgnization getParent() {
return parent;
} public void setParent(Orgnization parent) {
this.parent = parent;
} @OneToMany(mappedBy = "org")
public Set<Person> getPersons() {
return persons;
} public void setPersons(Set<Person> persons) {
this.persons = persons;
}}Person.java
package com.chk.model;import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;@Entity
public class Person {
private int id;
private String name;
private String sex;
private String address;
private String duty;
private String phone;
private String description;
private Orgnization org; @ManyToOne
public Orgnization getOrg() {
return org;
} public void setOrg(Orgnization org) {
this.org = org;
} @Id
@GeneratedValue
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSex() {
return sex;
} public void setSex(String sex) {
this.sex = sex;
} public String getAddress() {
return address;
} public void setAddress(String address) {
this.address = address;
} public String getDuty() {
return duty;
} public void setDuty(String duty) {
this.duty = duty;
} public String getPhone() {
return phone;
} public void setPhone(String phone) {
this.phone = phone;
} public String getDescription() {
return description;
} public void setDescription(String description) {
this.description = description;
}
}
一、我要用Annotation的方式,
二、我现在只能通过 “子”找到“父”
问题是:我如何通过 “父”找到“子”我的测试时代码如下:
test.java
@Test
public void loadtest() {
Configuration cfg = new Configuration().configure();
SessionFactory sf = cfg.buildSessionFactory();
Session s = sf.getCurrentSession();
s.beginTransaction(); Orgnization org1 = (Orgnization) s.get(Orgnization.class, 1);
Set set = org1.getPersons();
System.out.println(set.size());
for (Iterator iterator = set.iterator(); iterator.hasNext();) {
Orgnization org = (Orgnization) iterator.next();
System.out.println(org.getName());
} s.getTransaction().commit(); }
package com.chk.model;import java.util.HashSet;
import java.util.Set;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;@Entity
public class Orgnization {
private int id;
private String name;
private String sn;
private String description;
private Orgnization parent;// 父节点
private Set<Person> persons = new HashSet<Person>();// 子节点 @Id
@GeneratedValue
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSn() {
return sn;
} public void setSn(String sn) {
this.sn = sn;
} public String getDescription() {
return description;
} public void setDescription(String description) {
this.description = description;
} @ManyToOne
public Orgnization getParent() {
return parent;
} public void setParent(Orgnization parent) {
this.parent = parent;
} @OneToMany(mappedBy = "org")
public Set<Person> getPersons() {
return persons;
} public void setPersons(Set<Person> persons) {
this.persons = persons;
}}Person.java
package com.chk.model;import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;@Entity
public class Person {
private int id;
private String name;
private String sex;
private String address;
private String duty;
private String phone;
private String description;
private Orgnization org; @ManyToOne
public Orgnization getOrg() {
return org;
} public void setOrg(Orgnization org) {
this.org = org;
} @Id
@GeneratedValue
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSex() {
return sex;
} public void setSex(String sex) {
this.sex = sex;
} public String getAddress() {
return address;
} public void setAddress(String address) {
this.address = address;
} public String getDuty() {
return duty;
} public void setDuty(String duty) {
this.duty = duty;
} public String getPhone() {
return phone;
} public void setPhone(String phone) {
this.phone = phone;
} public String getDescription() {
return description;
} public void setDescription(String description) {
this.description = description;
}
}
一、我要用Annotation的方式,
二、我现在只能通过 “子”找到“父”
问题是:我如何通过 “父”找到“子”我的测试时代码如下:
test.java
@Test
public void loadtest() {
Configuration cfg = new Configuration().configure();
SessionFactory sf = cfg.buildSessionFactory();
Session s = sf.getCurrentSession();
s.beginTransaction(); Orgnization org1 = (Orgnization) s.get(Orgnization.class, 1);
Set set = org1.getPersons();
System.out.println(set.size());
for (Iterator iterator = set.iterator(); iterator.hasNext();) {
Orgnization org = (Orgnization) iterator.next();
System.out.println(org.getName());
} s.getTransaction().commit(); }
一、我要用Annotation的方式,
二、我现在只能通过 “子”找到“父”
问题是:我如何通过 “父”找到“子”
如何通过“父”找到“子”?
你说呢?
从你的配置上看,注解配置,不太规范,应该给表名,列名(不给就是默认属性值),不太规范而已。不过配置来看,大体是没有问题。
你的父是父组织吗?你父组织配置的是自关联,如果你想实现双相关联,并且是双相关联,则还需要加一个子组织的set。
不加 @JoinColumn()会生成中间表。
需要哪些参数
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.Table;import org.directwebremoting.annotations.DataTransferObject;
/**
* CusCustomer entity. @author MyEclipse Persistence Tools
*/
@Entity
@Table(name = "customer" ,schema = "cc")public class Customer implements java.io.Serializable { // Fields /**
*
*/
private static final long serialVersionUID = 1L;
@Id
@Column(name = "cus_id")
@GeneratedValue(strategy = GenerationType.AUTO)
private Long cusId;
@Column(name = "cus_name" ,length = 20 )
// @RemoteProperty 如果只要该属性s
private String cusName;
@Column(name = "cus_addr",length = 250)
private String cusAddr;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "customer" ,fetch = FetchType.EAGER)
private List<Product> products; // Constructors /** default constructor */
public Customer() {
} /** full constructor */
public Customer(String cusName, String cusAddr) {
this.cusName = cusName;
this.cusAddr = cusAddr;
} // Property accessors public Long getCusId() {
return this.cusId;
} public void setCusId(Long cusId) {
this.cusId = cusId;
} public String getCusName() {
return this.cusName;
} public void setCusName(String cusName) {
this.cusName = cusName;
} public String getCusAddr() {
return this.cusAddr;
} public void setCusAddr(String cusAddr) {
this.cusAddr = cusAddr;
}
public List<Product> getProducts() {
return products;
} public void setProducts(List<Product> products) {
this.products = products;
}}
/**
*
*/
package com.zuxiang.entity;import java.io.Serializable;import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;import org.directwebremoting.annotations.DataTransferObject;/**
* @author zuxiang
*
*/
@Entity
@Table(name = "product" ,schema = "cc")
public class Product implements Serializable{ /**
*
*/
private static final long serialVersionUID = 1L;
@Id
@Column(name = "pro_id")
@GeneratedValue(strategy = GenerationType.AUTO)
private Long proId;
@Column(name = "pro_name" , length = 50 ,nullable = false)
private String proName;
@Column(name = "pro_price" ,nullable = false)
private Double proPrice;
@Column(name = "pro_description" ,length = 500 )
private String proDescription;
@ManyToOne(cascade = CascadeType.ALL )
@JoinColumn(name = "customer_id")
private Customer customer;
public Double getProPrice() {
return proPrice;
}
public void setProPrice(Double proPrice) {
this.proPrice = proPrice;
} public Long getProId() {
return proId;
}
public void setProId(Long proId) {
this.proId = proId;
}
public String getProName() {
return proName;
}
public void setProName(String proName) {
this.proName = proName;
} public String getProDescription() {
return proDescription;
}
public void setProDescription(String proDescription) {
this.proDescription = proDescription;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
}
@JoinColumn(name = "parent_id")
private Orgnization parent;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "parent")
private Set<Orgnization> children = new HashSet<Orgnization>();
您的意思是再增加一个属性children ,用它来记录父机构的记录?