Hibernate注解（一）

 1 <?xml version=‘1.0‘ encoding=‘utf-8‘?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD//EN" 4 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 ??6 <hibernate-configuration> 7 ????<session-factory> 8 ???????<property name="connection.username">root</property> 9 ???????<property name="connection.password">mysql</property>10 ???????<property name="connection.driver_class">com.mysql.jdbc.Driver</property>11 ???????<property name="connection.url">jdbc:mysql:///hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>12 ???????13 ???????<!-- 配置数据的库的前缀 -->14 ???????<property name="dialect">org.hibernate.dialect.MySQLDialect</property>15 ???????????16 ???????????<!-- 17 ???????????????是否把Hibernate运行时的SQL语句输出到控制台，编码阶段便于测试18 ????????????-->19 ???????????<property name="show_sql">true</property>20 ???????????<!-- 21 ???????????????输出到控制台的SQL语句是否进行排版，便于阅读。建议设置true22 ????????????-->23 ???????????<property name="format_sql">true</property>24 ???????????<!-- 25 ???????????????可以到帮助由java代码生成数据库脚本，进而生辰具体的表结构。26 ???????????????create|update|create-drop|validate27 ????????????-->28 ???????????<property name="hbm2ddl.auto">create</property>29 ???????????30 ???????????<mapping class="com.entity.Student"/>31 ???????<!-- ????<mapping class="com.entity.StudentA"/> -->32 ????</session-factory>33 ?34 </hibernate-configuration>

 1 package com.entity; 2 ?3 import java.util.Date; 4 ?5 import javax.persistence.Entity; 6 import javax.persistence.Id; 7 import javax.persistence.Table; 8 ?9 /** 10 ?* 学生实体类11 ?* 12 ?* @Table(name="",catalog="",schema=""),mysql不支持catalog属性，13 ?* 这里的name属性和@Enity的name属性作用是一样的都是给表起一个名字14 ?*15 ?*/16 @Entity//(name = "t_students")17 @Table(name="t_students",schema="hibernate")18 public class Students {19 ????20 ????21 ????private int sid;//学号22 ????private String sname;//姓名23 ????private String gender;//出生日期24 ????private Date birthday;//出生日期25 ????private String major;//专业26 ????private String address;//地址27 ????28 ????public Students() {29 ????}30 31 ????public Students(int sid, String sname, String gender, Date birthday, String major, String address) {32 ????????this.sid = sid;33 ????????this.sname = sname;34 ????????this.gender = gender;35 ????????this.birthday = birthday;36 ????????this.major = major;37 ????????this.address = address;38 ????}39 40 ????@Id41 ????public int getSid() {42 ????????return sid;43 ????}44 45 ????public void setSid(int sid) {46 ????????this.sid = sid;47 ????}48 49 ????public String getSname() {50 ????????return sname;51 ????}52 53 ????public void setSname(String sname) {54 ????????this.sname = sname;55 ????}56 57 ????public String getGender() {58 ????????return gender;59 ????}60 61 ????public void setGender(String gender) {62 ????????this.gender = gender;63 ????}64 65 ????public Date getBirthday() {66 ????????return birthday;67 ????}68 69 ????public void setBirthday(Date birthday) {70 ????????this.birthday = birthday;71 ????}72 73 ????public String getMajor() {74 ????????return major;75 ????}76 77 ????public void setMajor(String major) {78 ????????this.major = major;79 ????}80 81 ????public String getAddress() {82 ????????return address;83 ????}84 85 ????public void setAddress(String address) {86 ????????this.address = address;87 ????}88 ????89 ????90 ????91 ????92 ????93 }

 1 package com.entity; 2 ?3 import java.util.Date; 4 ?5 import javax.persistence.Entity; 6 import javax.persistence.Id; 7 import javax.persistence.Table; 8 ?9 /** 10 ?* 学生实体类11 ?* 12 ?* @Table(name="",catalog="",schema=""),mysql不支持catalog属性，13 ?* 这里的name属性和@Enity的name属性作用是一样的都是给表起一个名字14 ?*15 ?*/16 @Entity//(name = "t_students")17 @Table(name="t_students",schema="hibernate")18 public class StudentA {19 ????20 ????private int sid;//学号21 ????private String sname;//姓名22 ????private String gender;//出生日期23 ????private Date birthday;//出生日期24 ????private String major;//专业25 ????private Address add;//地址26 ????27 ????public StudentA() {28 ????}29 30 ????public StudentA(int sid, String sname, String gender, Date birthday, String major, Address add) {31 ????????this.sid = sid;32 ????????this.sname = sname;33 ????????this.gender = gender;34 ????????this.birthday = birthday;35 ????????this.major = major;36 ????????this.add = add;37 ????}38 39 ????@Id40 ????public int getSid() {41 ????????return sid;42 ????}43 44 ????public void setSid(int sid) {45 ????????this.sid = sid;46 ????}47 48 ????public String getSname() {49 ????????return sname;50 ????}51 52 ????public void setSname(String sname) {53 ????????this.sname = sname;54 ????}55 56 ????public String getGender() {57 ????????return gender;58 ????}59 60 ????public void setGender(String gender) {61 ????????this.gender = gender;62 ????}63 64 ????public Date getBirthday() {65 ????????return birthday;66 ????}67 68 ????public void setBirthday(Date birthday) {69 ????????this.birthday = birthday;70 ????}71 72 ????public String getMajor() {73 ????????return major;74 ????}75 76 ????public void setMajor(String major) {77 ????????this.major = major;78 ????}79 80 ????public Address getAdd() {81 ????????return add;82 ????}83 84 ????public void setAdd(Address address) {85 ????????this.add = address;86 ????}87 ????88 ????89 ????90 ????91 ????92 ????93 ????94 }

 1 package com.entity; 2 ?3 import javax.persistence.Embeddable; 4 ?5 /*地址类*/ 6 ?7 @Embeddable /*表示嵌入类，这个类的对象在另一个实体类中充当属性*/ 8 public class Address { 9 ????10 ????private String postCode;//邮编11 ????private String address;//地址12 ????private String phone;//联系电话13 ????14 ????public Address() {15 ????}16 ????17 ????public String getPostCode() {18 ????????return postCode;19 ????}20 ????public void setPostCode(String postCode) {21 ????????this.postCode = postCode;22 ????}23 ????public String getAddress() {24 ????????return address;25 ????}26 ????public void setAddress(String address) {27 ????????this.address = address;28 ????}29 ????public String getPhone() {30 ????????return phone;31 ????}32 ????public void setPhone(String phone) {33 ????????this.phone = phone;34 ????}35 ????36 ????37 ????38 ????39 ????40 }

 1 package com.entity; 2 ?3 import org.hibernate.SessionFactory; 4 import org.hibernate.cfg.Configuration; 5 import org.hibernate.service.ServiceRegistry; 6 import org.hibernate.service.ServiceRegistryBuilder; 7 import org.hibernate.tool.hbm2ddl.SchemaExport; 8 import org.junit.Test; 9 10 public class TestStudents {11 ????12 ????@Test13 ????public void testShemaExport(){14 ????????//创建hibernate配置对象15 ????????Configuration config = new Configuration().configure();16 ????????17 ????????//创建服务注册对象18 ????????ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();19 ????????20 ????????//生成sessionFactory21 ????????SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistry);22 ????????23 ????????SchemaExport export = new SchemaExport(config);24 ????????25 ????????export.create(true,true);26 ????????27 ????????28 ????}29 }