Hibernate4基础之四：基础配置@Table@Column@Temporal@Transient@Enumerated

1.Teacher类对应对应t_Teacher表

其中：

@Table(name="t_Teacher")//解决类名和表名不对应

@Column(name="id")//解决属性名和字段名不对应

@Column(length=50)//限制字符串长度

@Temporal(TemporalType.DATE)//限制时间格式：只记录日期不记录时间。默认是时间日期都记录

@Transient//隐藏属性，不会被映射到表中

@Enumerated(EnumType.STRING)//把枚举里的sring存储进去

@Enumerated(EnumType.ORDINAL)//把存在的顺序编号int存储进去

import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.EnumType; import javax.persistence.Enumerated; import javax.persistence.Id; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; import javax.persistence.Transient; @Entity @Table(name="t_Teacher")//解决类名和表名不对应 public class Teacher { private int teacherid; private String name; private int age; private Date birthday; private String secret; private Grade grade; //setter&getter @Id @Column(name="id")//解决属性名和字段名不对应 public int getTeacherid() { return teacherid; } @Column(length=50)//限制字符串长度 public String getName() { return name; } @Temporal(TemporalType.DATE)//限制时间格式：只记录日期不记录时间。默认是时间日期都记录 public Date getBirthday() { return birthday; } @Transient//隐藏属性，不会被映射到表中 public String getSecret() { return secret; } @Enumerated(EnumType.STRING)//把枚举里的sring存储进去 //@Enumerated(EnumType.ORDINAL),把存在的顺序编号int存储进去 public Grade getGrade() { return grade; }

2.JUnit测试：

插入

Session session = HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction();  Teacher t = new Teacher(); t.setTeacherid(203); t.setName("李四"); t.setAge(0); t.setBirthday(new Date()); t.setGrade(Grade.A);  session.save(t);  session.getTransaction().commit(); HibernateUtil.getSessionFactory().close();

查询：

Session session2 = HibernateUtil.getSessionFactory().getCurrentSession(); session2.beginTransaction();  List<Teacher> result = session2.createQuery("from Teacher").list();//此行的Event指的是对应的类名，而不是数据表的名字。 Iterator it = result.iterator(); Teacher value = null; while (it.hasNext()) { value = (Teacher)it.next(); System.out.println(value.getTeacherid()); System.out.println(value.getName()); System.out.println(value.getAge()); System.out.println(value.getBirthday()); System.out.println(value.getGrade()); }  session2.getTransaction().commit(); HibernateUtil.getSessionFactory().close();