struts hibernate spring 全注解开发框架

package cn.edu.dlnu.model; import java.util.Date; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; import javax.persistence.Table; @Entity @Table(name="DreamOnline_Student") public class Student { private String Account; private String Name; private String Password; private String Telephone; private String Email; private Date RegisterDatetime; private StudentClass classes; @Id @Column(name="Account") public String getAccount() { if(Account!=null&&Account.length()>0) Account = Account.trim(); return Account; } public void setAccount(String account) { Account = account; } @Column(name="Name") public String getName() { if(Name!=null&&Name.length()>0) Name = Name.trim(); return Name; } public void setName(String name) { Name = name; } @Column(name="Password") public String getPassword() { return Password; } public void setPassword(String password) { Password = password; } @Column(name="Telephone") public String getTelephone() { return Telephone; } public void setTelephone(String telephone) { Telephone = telephone; } @Column(name="Email") public String getEmail() { return Email; } public void setEmail(String email) { Email = email; } @Column(name="RegisterDatetime") public Date getRegisterDatetime() { return RegisterDatetime; } public void setRegisterDatetime(Date registerDatetime) { RegisterDatetime = registerDatetime; } @ManyToOne(cascade={CascadeType.MERGE,CascadeType.REFRESH},optional=true) @JoinColumn(name="ClassName") public StudentClass getClasses() { return classes; } public void setClasses(StudentClass classes) { this.classes = classes; } }