ORM映射关系：注解方式

1. package org.crazyit.app.domain;
3. import javax.persistence.*;
4. import org.hibernate.annotations.Formula;
6. @Entity(name="news_inf")
7. public class News
8. {
9. // 消息类的标识属性
10. @Id
11. @GeneratedValue(strategy=GenerationType.IDENTITY)
12. private Integer id;
13. // 消息标题
14. private String title;
15. // 消息内容
16. private String content;
17. // 消息全部内容，由系统根据公式生成
18. @Formula("(select concat(nt.title,nt.content)"
19. + "from news_inf nt where nt.id= id)")
20. private String fullContent;
22. // id的setter和getter方法
23. public void setId(Integer id)
24. {
25. this.id = id;
26. }
27. public Integer getId()
28. {
29. return this.id;
30. }
32. // title的setter和getter方法
33. public void setTitle(String title)
34. {
35. this.title = title;
36. }
37. public String getTitle()
38. {
39. return this.title;
40. }
42. // content的setter和getter方法
43. public void setContent(String content)
44. {
45. this.content = content;
46. }
47. public String getContent()
48. {
49. return this.content;
50. }
52. // fullContent的setter和getter方法
53. public void setFullContent(String fullContent)
54. {
55. this.fullContent = fullContent;
56. }
57. public String getFullContent()
58. {
59. return this.fullContent;
60. }
61. }

---

主函数

---