Hibernate 客戶化映射類型--UserType

Hibernate 的客戶化映射類型接口,允許用戶以編程的方式創建自定義的映射類型,以實現把持久化類的任意類型的屬性映射到數據庫
以下例子可以把User類的Integer類型的phone屬性映射到user表的varchar類型的phone字段

User.java

1. package com.wudasong.pojo;
3. import java.io.Serializable;
4. import java.sql.Timestamp;
5. import java.util.Date;
7. publicclass User implements Serializable{
9. /**
10. *
11. */
12. privatestaticfinallong serialVersionUID = 5767515928671889957L;
14. private Long id;
15. private String name;
16. private String email;
17. private Integer phone;
18. privatebyte sex;
19. private Date birthday;
20. private String mark;
21. private String password;
22. private Timestamp registerTime;
24. public User(){}
26. public Long getId() {
27. return id;
28. }
29. @SuppressWarnings("unused")
30. privatevoid setId(Long id) {
31. this.id = id;
32. }
33. //此處省略User類的其他屬性的getXXX()和setXXX()方法
35. }

自定義UserType類

1. package com.wudasong.pojo;
3. import java.io.Serializable;
4. import java.sql.PreparedStatement;
5. import java.sql.ResultSet;
6. import java.sql.SQLException;
7. import java.sql.Types;
9. import org.hibernate.HibernateException;
10. import org.hibernate.usertype.UserType;
12. publicclass PhoneUserType implements UserType{
14. privatestaticfinalint[] SQL_TYPES={Types.VARCHAR};
16. @Override
17. publicint[] sqlTypes() {
18. return SQL_TYPES;
19. }
21. @Override
22. public Class<Integer> returnedClass() {
23. return Integer.class;
24. }
26. @Override
27. publicboolean equals(Object x, Object y) throws HibernateException {
28. if(x==y){
29. returntrue;
30. }elseif(x==null||y==null){
31. returnfalse;
32. }else {
33. return x.equals(y);
34. }
35. }
37. @Override
38. publicint hashCode(Object x) throws HibernateException {
39. return x.hashCode();
40. }
42. @Override
43. public Object deepCopy(Object value) throws HibernateException {
44. return value;
45. }
47. @Override
48. publicboolean isMutable() {
49. returnfalse;
50. }
52. @Override
53. public Serializable disassemble(Object value) throws HibernateException {
54. return (Serializable) value;
55. }
57. @Override
58. public Object assemble(Serializable cached, Object owner)
59. throws HibernateException {
60. return cached;
61. }
63. @Override
64. public Object nullSafeGet(ResultSet resultSet, String[] names, Object owner)
65. throws HibernateException, SQLException {
66. if(resultSet.wasNull()){
67. returnnull;
68. }else{
69. String phone=resultSet.getString(names[0]);
70. returnnew Integer(phone);
71. }
72. }
74. @Override
75. publicvoid nullSafeSet(PreparedStatement statement, Object value, int index)
76. throws HibernateException, SQLException {
77. if(value==null){
78. statement.setNull(index, Types.VARCHAR);
79. }else {
80. String phone=((Integer)value).toString();
81. statement.setString(index, phone);
82. }
83. }
85. @Override
86. public Object replace(Object original, Object target, Object owner)
87. throws HibernateException {
88. return original;
89. }
91. }