Student类
package com.wangning.bean; public class Student { private Integer id; private String name; private int age; private double score; @Override public String toString() { return "Student [id=" + id + ", name=" + name + ", age=" + age + ", score=" + score + "]"; } public Student() { super(); } public Student(String name, int age, double score) { super(); this.name = name; this.age = age; this.score = score; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public double getScore() { return score; } public void setScore(double score) { this.score = score; } }
Student.hbm.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.wangning.bean"> <!-- 映射文件的作用: 1、完成类到表的映射 2、属性到字段的映射 --> <class name="Student" table="t_student"> <id name="id" column="tid"> <generator class="native"></generator> </id> <property name="name" column="tname"></property> <property name="age" column="tage"></property> <property name="score" column="tscore"></property> </class> </hibernate-mapping>
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?> <!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> <!-- DB链接4要素 --> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql:///world</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">huadiyatou1314</property> <!-- 方言 --> <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property> <!-- 数据源 :数据连接池--> <property name="hibernate.connection.provider_class">org.hibernate.c3p0.internal.C3P0ConnectionProvider</property> <!-- 当前session上下文:保证统一线程获取到的session是同一个--> <property name="hibernate.current_session_context_class">thread</property> <!-- 自动建表 --> <property name="hibernate.hbm2ddl.auto">update</property> <!-- 显示SQL --> <property name="hibernate.show_sql">true</property> <!-- 格式化SQL --> <property name="hibernate.format_sql">true</property> <mapping resource="com/wangning/bean/Student.hbm.xml"/> </session-factory> </hibernate-configuration>
分析:
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration>
DTD----->这段代码可以从
hibernate-core-5.1.9.Final.jar/org/hibernate/hibernate-configuration-3.0.dtd
路径下copy。同理映射文件中的dtd也相应加入。
package test; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import org.junit.Test; import com.wangning.bean.Student; public class Test1 { @Test public void mytest() { //加载主配置文件 Configuration config=new Configuration().configure(); //创建Session工厂 SessionFactory sessionFactory=config.buildSessionFactory(); //获取Session Session session=sessionFactory.getCurrentSession(); session.getTransaction().begin(); //执行操作 Student student =new Student("王五",21,100); session.save(student); session.getTransaction().commit(); } }
1、默认名字:hibernate.cfg.xml 是因为 new Configuration().configure()方法。如下定义:
public static final String DEFAULT_CFG_RESOURCE_NAME = "hibernate.cfg.xml"; public Configuration configure() throws HibernateException { return configure( StandardServiceRegistryBuilder.DEFAULT_CFG_RESOURCE_NAME ); }
我们也可以更换名字为 wangwu.cfg.xml。只需在方法调用时 变更为
//加载主配置文件 Configuration config=new Configuration().configure("wangwu.cfg.xml");
原文:http://www.cnblogs.com/huadiyatou/p/7512811.html