JPA 2.0 简单映射 -

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JPA 2.0 简单映射

博客分类：

JPA 2.0

jpa

// 通知持久化引擎该类是一个实体
@Entity
@Table(name = "employee", schema="springdao")
public class Employee implements Serializable {

	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = -581308461934077076L;

	// 注解了持久化标识，即唯一的标识键
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer id;
	private String name;
	private Long salary;
	private String phoneNum;
	
	@Basic(fetch = FetchType.LAZY)
	@Lob @Column(name = "picture")		// 大型对象的延迟加载
	private Byte[] picture;
	
	@Enumerated(EnumType.STRING)		// 默认的是插入序号 用插入值可以避免增加新的枚举类型序号的变化
	private EmployeeType type;
	
	@Temporal(TemporalType.DATE)		//java.util 日期类型需要指明隐射时JDBC处理的方式
	private Calendar dob;
	@Temporal(TemporalType.TIMESTAMP)
	private Date startDate;
	
	@Transient
	private String combineArrt;		// 忽略，不将其映射到数据库
	
	// 当定义双向一对多（或多对一）关系时：
	// 多对一一方是所有方，在该方定义连接列
	// 一对多是反方，所以必须使用 mappedBy 元素，否则会生成一个中间联结表
	@ManyToOne
	@JoinColumn(name = "dept_id")	// JoinColumn 来实现外键关联，默认的话为
	private Department department;	// 源实体中的关系特性的名称_目标实体的主键名 
									// 按照惯例逻辑映射先出现，因为物理映射有默认值
	@OneToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "pspace_id")
	private ParkingSpace parkingSpace;
	
	// 多对多关系的实现是中间表(join table)，但是必须要有一方是mappedBy
	@ManyToMany
	@JoinTable(name = "emp_proj",
		joinColumns = @JoinColumn(name = "emp_id"),
		inverseJoinColumns = @JoinColumn(name = "proj_id")
			)
	private Collection<Project> projects;
	
	// 单项一对多关系，需要中间表
	@OneToMany
	@JoinTable(name = "emp_phone",
		joinColumns = @JoinColumn(name = "emp_id"),
		inverseJoinColumns = @JoinColumn(name = "phone_id")
			)
	private Collection<Phone> phones;
	
	public Employee() {}
	public Employee(Integer id) { this.id = id; }
	
	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 Long getSalary() {
		return salary;
	}
	
	public void setSalary(Long salary) {
		this.salary = salary;
	}
	
	public String getPhoneNum() {
		return phoneNum;
	}
	
	public void setPhoneNum(String phoneNum) {
		this.phoneNum = phoneNum;
	}
	
	public Byte[] getPicture() {
		return picture;
	}
	
	public void setPicture(Byte[] picture) {
		this.picture = picture;
	}
	
	public EmployeeType getType() {
		return type;
	}
	
	public void setType(EmployeeType type) {
		this.type = type;
	}
	
	public String getCombineArrt() {
		return this.id + "; " + this.name;
	}
	
	public void setCombineArrt(String combineArrt) {
		this.combineArrt = combineArrt;
	}
	
	public Calendar getDob() {
		return dob;
	}
	
	public void setDob(Calendar dob) {
		this.dob = dob;
	}
	
	public Date getStartDate() {
		return startDate;
	}
	
	public void setStartDate(Date startDate) {
		this.startDate = startDate;
	}
	
	public Department getDepartment() {
		return department;
	}
	
	public void setDepartment(Department department) {
		this.department = department;
	}
	
	public ParkingSpace getParkingSpace() {
		return parkingSpace;
	}
	
	public void setParkingSpace(ParkingSpace parkingSpace) {
		this.parkingSpace = parkingSpace;
	}
	
	public Collection<Project> getProjects() {
		return projects;
	}
	
	public void setProjects(Collection<Project> projects) {
		this.projects = projects;
	}
	
	@Override
	public String toString() {
		return "Employee [id=" + id + ", name=" + name + ", salary=" + salary
				+ ", phoneNum=" + phoneNum + ", picture="
				+ Arrays.toString(picture) + ", type=" + type + ", dob=" + dob
				+ ", startDate=" + startDate + ", combineArrt=" + combineArrt
				+ "]";
	}
}

@Entity
@Table(name = "addresstwo")
public class AddressTwo implements Serializable {

	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 4003827955642961159L;

	@TableGenerator(name = "Address_Gen",
			table = "id_gen",
			pkColumnName = "gen_name",
			valueColumnName = "gen_val",
			pkColumnValue = "Addr_Gen",
			initialValue = 10000,
			allocationSize = 100)
	@Id @GeneratedValue(strategy = GenerationType.TABLE, generator = "Address_Gen")
	private int id;
	private String name;
	
	public AddressTwo() {}
	public AddressTwo(int id, String name) {
		this.id = id;
		this.name = name;
	}
	
	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;
	}
	
	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this);
	}
}

@Entity
@Table(name = "department")
public class Department implements Serializable {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String name;

	@OneToMany(mappedBy = "department")
	private Collection<Employee> employees;
	
	public Department() {}

	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 Collection<Employee> getEmployees() {
		return employees;
	}

	public void setEmployees(Collection<Employee> employees) {
		this.employees = employees;
	}

	@Override
	public String toString() {
		return "Department [id=" + id + ", name=" + name + ", employees="
				+ employees + "]";
	}
}

@Entity
@Table(name = "park_space")
public class ParkingSpace implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 7356683100796513602L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private int lot;
	private String location;
	// 双向onetoone mappedBy 还是表明 Employee 是源实体，放在没有定义联结列的实体上
	@OneToOne(mappedBy = "parkingSpace")
	private Employee employee;
	
	public ParkingSpace() {}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public int getLot() {
		return lot;
	}

	public void setLot(int lot) {
		this.lot = lot;
	}

	public String getLocation() {
		return location;
	}

	public void setLocation(String location) {
		this.location = location;
	}
	
	public Employee getEmployee() {
		return employee;
	}

	public void setEmployee(Employee employee) {
		this.employee = employee;
	}

	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this);
	}
}

@Entity
@Table(name = "project")
public class Project implements Serializable {

	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 7315080326584390902L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String proName;
	@ManyToMany(mappedBy = "projects")
	private Collection<Employee> employees;
	
	public Project() {}
	
	public int getId() {
		return id;
	}
	
	public void setId(int id) {
		this.id = id;
	}
	
	public String getProName() {
		return proName;
	}
	
	public void setProName(String proName) {
		this.proName = proName;
	}
	
	public Collection<Employee> getEmployees() {
		return employees;
	}
	
	public void setEmployees(Collection<Employee> employees) {
		this.employees = employees;
	}
	
	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this);
	}
	
}

@Entity
@Table(name = "phone")
public class Phone implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 682045004499830046L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private int type;
	private String num;
	
	public Phone() {}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public int getType() {
		return type;
	}

	public void setType(int type) {
		this.type = type;
	}

	public String getNum() {
		return num;
	}

	public void setNum(String num) {
		this.num = num;
	}

	@Override
	public String toString() {
		return "Phone [id=" + id + ", type=" + type + ", num=" + num + "]";
	}
}

@Entity
@Table(name = "head")
public class Head implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 1856809533670124595L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String name;
	
	@OneToOne(optional = false, cascade = CascadeType.ALL)
	@JoinColumn(name = "nose_id")
	private Nose nose;
	
	public Head() {}

	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 Nose getNose() {
		return nose;
	}

	public void setNose(Nose nose) {
		this.nose = nose;
	}

	@Override
	public String toString() {
		return "Head [id=" + id + ", name=" + name + "]";
	}
	
}

@Entity
@Table(name = "nose")
public class Nose implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	
	private static final long serialVersionUID = 8615516251260117582L;
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String name;
	
	@OneToOne(mappedBy = "nose")
	private Head head;
	
	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 Head getHead() {
		return head;
	}

	public void setHead(Head head) {
		this.head = head;
	}

	@Override
	public String toString() {
		return "Nose [id=" + id + ", name=" + name + "]";
	}

}

/** 
 * ClassName:Animal <br/> 
 * Function: 嵌入对象 embedded object. <br/> 
 * Reason:   TODO ADD REASON. <br/> 
 * Date:     2014年7月4日 下午1:58:45 <br/> 
 * @author   zhangzhaoyu 
 * @version   
 * @since    JDK 1.7 
 * @see       
 */
@Entity
@Table(name = "animal")
public class Animal implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = 3295314624812247524L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String name;
	private String age;
	
	@Embedded
	private LiveAddress liveAddress;
	
	public Animal() {}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "Animal [id=" + id + ", name=" + name + ", age=" + age
				+ ", liveAddress=" + liveAddress + "]";
	}
}

/** 
 * ClassName:Bird <br/> 
 * Function: 重命名嵌入字段的值. <br/> 
 * Reason:   TODO ADD REASON. <br/> 
 * Date:     2014年7月4日 下午2:12:46 <br/> 
 * @author   zhangzhaoyu 
 * @version   
 * @since    JDK 1.7 
 * @see       
 */
@Entity
@Table(name = "exercise_bird")
public class Bird implements Serializable {
	/**
	 * serialVersionUID:TODO
	 * @since JDK 1.7
	 */
	private static final long serialVersionUID = -317303554096481889L;
	
	@Id @GeneratedValue(strategy = GenerationType.IDENTITY)
	private int id;
	private String name;
	
	@Embedded
	@AttributeOverrides({
		@AttributeOverride(name = "state", column = @Column(name = "bird_state")),
		@AttributeOverride(name = "zip", column = @Column(name = "bird_zip"))
	})
	private LiveAddress liveAddress;
	
	public Bird() {}

	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 LiveAddress getLiveAddress() {
		return liveAddress;
	}

	public void setLiveAddress(LiveAddress liveAddress) {
		this.liveAddress = liveAddress;
	}

	@Override
	public String toString() {
		return "Bird [id=" + id + ", name=" + name + ", liveAddress="
				+ liveAddress + "]";
	}
}

/** 
 * ClassName:LiveAddress <br/> 
 * Function: 嵌入对象 embedded object. <br/> 
 * Reason:   TODO ADD REASON. <br/> 
 * Date:     2014年7月4日 下午2:01:44 <br/> 
 * @author   zhangzhaoyu 
 * @version   
 * @since    JDK 1.7 
 * @see       
 */
@Embeddable @Access(AccessType.FIELD)
public class LiveAddress implements Serializable {

	private String street;
	private String city;
	private String state;
	@Column(name = "zip_code")
	private String zip;
	
}

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