JPA 的基本注解

 1 @Table(name="CUSTOMER")
 2 @Entity
 3 public class Customer {
 4 private Integer id;
 5 private String lastName;
 6 private String email;
 7 private int age;
 8 
 9 private Date createdTime;
10 private Date birth;
11 
12 //创建时间设置精确到秒
13 @Temporal(TemporalType.TIMESTAMP)
14 public Date getCreatedTime() {
15     return createdTime;
16 }
17 
18 public void setCreatedTime(Date createdTime) {
19     this.createdTime = createdTime;
20 }
21 //生日设置精确到天
22 @Temporal(TemporalType.DATE)
23 public Date getBirth() {
24     return birth;
25 }
26 public void setBirth(Date birth) {
27     this.birth = birth;
28 }
29 @Column(name="id")
30 @GeneratedValue(strategy=GenerationType.AUTO)
31 @Id
32 public Integer getId() {
33     return id;
34 }
35 public void setId(Integer id) {
36     this.id = id;
37 }
38 @Column(name="Last_Name")
39 public String getLastName() {
40     return lastName;
41 }
42 public void setLastName(String lastName) {
43     this.lastName = lastName;
44 }
45 //默认为@Basic
46 public String getEmail() {
47     return email;
48 }
49 public void setEmail(String email) {
50     this.email = email;
51 }
52 //默认为@Basic
53 public int getAge() {
54     return age;
55 }
56 public void setAge(int age) {
57     this.age = age;
58 }
59 
60 //工具类，不需要映射为数据表的一列
61 @Transient
62 public String getInfo() {
63     return "lastName:"+lastName+",email:"+email;
64 }
65 }