JAVA JPA - 示例用法

JPA(Java Persistence API)是JSR(Java Specification Requests)的一部分，定义了一系列对象持久化的标准，目前实现这一规范的产品有Hibernate、TopLink等。

下面的示例程序是在jboss quickStart的基础上修改而来的

 

1、实体Bean：Member类

 1 package org.jboss.as.quickstart.hibernate4.model;
 2 
 3 import java.io.Serializable;
 4 
 5 import javax.persistence.Column;
 6 import javax.persistence.Entity;
 7 import javax.persistence.GeneratedValue;
 8 import javax.persistence.GenerationType;
 9 import javax.persistence.Id;
10 import javax.persistence.SequenceGenerator;
11 import javax.persistence.Table;
12 import javax.validation.constraints.Digits;
13 import javax.validation.constraints.NotNull;
14 import javax.validation.constraints.Pattern;
15 import javax.validation.constraints.Size;
16 import javax.xml.bind.annotation.XmlRootElement;
17 import org.hibernate.validator.constraints.Email;
18 import org.hibernate.validator.constraints.NotEmpty;
19 
20 @Entity
21 @XmlRootElement
22 @Table(name = "MemberHibernate4Demo")
23 public class Member implements Serializable {
24 
25     private static final long serialVersionUID = 3862416351900991824L;
26 
27     @Id
28     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "MEMBER_ID_GENERATOR")
29     @SequenceGenerator(name = "MEMBER_ID_GENERATOR", sequenceName = "SEQ_MEMBER", allocationSize = 1)
30     private Long id;
31 
32     @NotNull
33     @Size(min = 1, max = 25)
34     @Pattern(regexp = "[A-Za-z ]*", message = "must contain only letters and spaces")
35     private String name;
36 
37     @NotNull
38     @NotEmpty
39     @Email
40     private String email;
41 
42     @NotNull
43     @Size(min = 9, max = 12)
44     @Digits(fraction = 0, integer = 12)
45     @Column(name = "phone_number")
46     private String phoneNumber;
47 
48     private String address;
49 
50     public Long getId() {
51         return id;
52     }
53 
54     public void setId(Long id) {
55         this.id = id;
56     }
57 
58     public String getName() {
59         return name;
60     }
61 
62     public void setName(String name) {
63         this.name = name;
64     }
65 
66     public String getEmail() {
67         return email;
68     }
69 
70     public void setEmail(String email) {
71         this.email = email;
72     }
73 
74     public String getPhoneNumber() {
75         return phoneNumber;
76     }
77 
78     public void setPhoneNumber(String phoneNumber) {
79         this.phoneNumber = phoneNumber;
80     }
81 
82     public String getAddress() {
83         return address;
84     }
85 
86     public void setAddress(String address) {
87         this.address = address;
88     }
89 
90     public String toString() {
91 
92         return "id:" + id + ",name:" + name + ",email:" + email
93                 + ",phoneNumber:" + phoneNumber + ",address:" + address;
94     }
95 }

Member