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日期跟枚举等字段类型的JPA映射

2012-10-08 
日期和枚举等字段类型的JPA映射枚举类package cn.com.jyp.modelimport java.util.Dateimport javax.pers

日期和枚举等字段类型的JPA映射
枚举类

package cn.com.jyp.model;import java.util.Date;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.EnumType;import javax.persistence.Enumerated;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import javax.persistence.Temporal;import javax.persistence.TemporalType;@Entity@Table(name = "person")public class Person {private Integer id;private String name;private Date birthday;private Gender gender;@Id@GeneratedValuepublic Integer getId() {return id;}public void setId(Integer id) {this.id = id;}@Column(name = "personName", length = 15, nullable = false)public String getName() {return name;}public void setName(String name) {this.name = name;}@Temporal(TemporalType.DATE)public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}@Enumerated(EnumType.STRING)@Column(length = 5, nullable = false)public Gender getGender() {return gender;}public void setGender(Gender gender) {this.gender = gender;}}


@Table(name="person")
指定表名
@Column(name = "personName", length = 15, nullable = false)
指定字段名,长度,不为空(nullable默认为true)
@Temporal(TemporalType.DATE)
映射date类型属性,TemporalType.DATE表示存到数据库为1988-02-04;TemporalType.TIME表示存到数据库为12:12:12
@Enumerated(EnumType.STRING)
映射枚举类型属性,EnumType.STRING表示把枚举类中的值存到数据库;EnumType.ORDINAL表示把枚举类中的索引存到数据库

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