Order.java package cn.edu.ejb3.bean import java.io.Serializable import java.util.HashSet, import java util.Date: importjava.util.Set. import javax.persistence.Cascade Type. import iavax.persistence.Entitv: import javax.persistence.FetchTvpe import javax import javax.persistence.One ToMany. import javax.persistence.OrderBy: import javax.persistence.Table; import javax-persistence.Temporal. impor TemporalType @Entity @Table(name="Orders") public class Order implements Serializable private static final long serialVersionUID=4970325922198249712L private Integer orderid. private Float amount: private Set<Orderltem>orderltems=new HashSet<Orderltem>(). @Id @Generated Value public Integer getOrderid() returnorderid; public void setOrderid(nteger orderid) this.orderid orderid; public Float getAmount({ return amount. public void setAmount(Float amount){ this amount amount:Order.java: package cn.edu.ejb3.bean; import java.io.Serializable; import java.util.HashSet; import java.util.Date; import java.util.Set; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.OrderBy; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity @Table(name = "Orders") public class Order implements Serializable { private static final long serialVersionUID = 4970325922198249712L; private Integer orderid; private Float amount; private Set<OrderItem> orderItems = new HashSet<OrderItem>(); private Date createdate; @Id @GeneratedValue public Integer getOrderid() { return orderid; } public void setOrderid(Integer orderid) { this.orderid = orderid; } public Float getAmount() { return amount; } public void setAmount(Float amount) { this.amount = amount; }