<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
 <session-factory>
  <!-- 以下四行分別為：數(shù)據(jù)庫驅動類、Drivermanager獲取連接的參數(shù)URL、用戶名、密碼 -->
  <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="connection.url">jdbc:mysql://127.0.0.1/web?characterEcoding=utf-8</property>
  <property name="connection.username">root</property>
  <property name="connection.password">123456</property>
  <!-- 設置方言，hibernate會根據(jù)數(shù)據(jù)庫的類型相應生成SQL語句 -->
  <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
  <!-- 1.使用映射文件時 -->
  <!-- 映射配置源文件的位置 -->
  <mapping resource="demo/pojo/Person.hbm.xml"/>
  <!-- 2.使用映射注解時 -->
  <!-- 注冊關系映射類 -->
  <mapping class="demo.pojo.Person" />
 </session-factory>
</hibernate-configuration>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
 <!-- name是實體類全名，table為數(shù)據(jù)表名 -->
 <class name="demo.pojo.Person" table="Person">
  <id name="id" column="id">
   <!-- 主鍵生成方式，native是讓hibernate自動識別 -->
   <generator class="native"></generator>
  </id>
  <!-- 
  注意點：
  0.name值為實體類中屬性名，column為數(shù)據(jù)表中字段名；
  1.當實體類中屬性名與對應數(shù)據(jù)表字段名相同時，后面的column可以省略，hibernate會自動匹配，例如下面age ；
  2.反之當實體類中屬性名與對應數(shù)據(jù)表字段名不相同時，兩項都要寫上，例如下面gender和sex
  -->
  <property name="name" column="name"></property>
  <property name="gender" column="sex"></property>
  <property name="age"></property>
 </class>
</hibernate-mapping>

package demo.pojo;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
//實體類屬性注解，這里統(tǒng)一寫在各屬性的get方法上
@Entity//標記實體類
@Table(name="person",catalog="web")//name對應數(shù)據(jù)表名，catalog對應數(shù)據(jù)庫名
public class Person {
 
 private Integer id;
 private String name;
 private String gender;
 private Integer age;
 @Id//標記主鍵
 @Column(name="id")//主鍵字段名，這里與類屬性id是對應相同的，此行可以簡化不寫
 @GeneratedValue(strategy=GenerationType.AUTO)//主鍵生成策略，自動識別
 public Integer getId() {
  return id;
 }
 public void setId(Integer id) {
  this.id = id;
 }
 @Column(name="name")//主鍵字段名，這里與類屬性name是對應相同的，此行可以簡化不寫
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 @Column(name="sex")//主鍵字段名，這里與類屬性gender是對應，但不相同，不可省略
 public String getGender() {
  return gender;
 }
 public void setGender(String gender) {
  this.gender = gender;
 }
 //省略注解
 public Integer getAge() {
  return age;
 }
 public void setAge(Integer age) {
  this.age = age;
 }
 @Override
 public String toString() {
  return "Person [id=" + id + ", name=" + name + ", gender=" + gender + ", age=" + age + "]";
 }
 
 
}