@Entity

@Table(name = "t_user")

public class User implements Serializable {

    /**

     *

     */

    private static final long serialVersionUID = -9042615274714038279L;

    @Id

    @GeneratedValue(strategy = GenerationType.AUTO)

    private Long id;

    @Column(name = "name")

    private String name;

    @Column(name = "password")

    private String password;

    @Column(name = "age")

    private Integer age;

    @Column(name = "gender")

    //@Convert(converter = Genderconverter.class) //属性类型转换器，该配置映射到数据库后是自定的类型，例如保存性别是保存M/F,男/女

    //@Enumerated(EnumType.ORDINAL) //该配置映射保存到数据库后保存的是序号，从0开始

    //@Enumerated(EnumType.STRING) //该配置映射保存到数据后保存的String类型，例如MALE/FEMALE等

    private Gender gender;

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name == null ? null : name.trim();

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password == null ? null : password.trim();

    }

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Gender getGender() {

        return gender;

    }

    public void setGender(Gender gender) {

        this.gender = gender;

    }

    @Override

    public String toString() {

        return "User[id=" + id + ", name=" + name + ",age=" + age + ", gender=" + gender + "]";

    }

}

/**

 * 性别

 * @author daniel.zhao

 *

 */

public enum Gender {

    MALE("M"),

    FEMALE("F");

    private String code;

    private Gender(String code) {

        this.code = code;

    }

    public String getCode() {

        return code;

    }

    public void setCode(String code) {

        this.code = code;

    }

    public static Gender fromString(String code) {

        Objects.requireNonNull(code, "Gender code must not be null!");

        if (Gender.MALE.code.equals(code)) {

            return Gender.MALE;

        }

        if (Gender.FEMALE.code.equals(code)) {

            return Gender.FEMALE;

        }

        return null;

    }

}

@Converter

public class Genderconverter implements AttributeConverter<Gender, String> {

    @Override

    public String convertToDatabaseColumn(Gender attribute) {

        return attribute.getCode();

    }

    @Override

    public Gender convertToEntityAttribute(String dbData) {

        return Gender.fromString(dbData);

    }

}