正文
java SSH框架
小程序：扫一扫查出行【扫一扫了解最新限行尾号】
复制小程序
1整体流程：
1：hibernate流程：
2:hibernate使用流程：
2.1：建立用户jar包，导入hibernate相应的jar包
2.2 引入mysql的JDBC驱动包
2.3 在数据库中建立数据库和表
2.4 建立hibernate配置文件，hibernate.cfg.xml(修改对应的数据库连接内容，注释暂时不用的内容)
2.5 建立的Student类来对应表的字段
2.6 建立Student类的映射文件，Student.hbm.xml
2.7 将映射文件加入到hibernate.cfg.xml中
2.8写测试类，对Student进行存储测试
目录结构：
hibernate相关jar包
hibernate.cfg.xml文件在src目录下
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost/hibernate</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property> <!-- JDBC connection pool (use the built-in) -->
<!--<property name="connection.pool_size">1</property> --> <!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property> <!-- -->
<!-- Enable Hibernate's automatic session context management -->
<!-- <property name="current_session_context_class">thread</property> --> <!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> <!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property> <!-- Drop and re-create the database schema on startup -->
<!--<property name="hbm2ddl.auto">update</property> --> <mapping resource="com/hyb/hibernate/model/Student.hbm.xml" />
<mapping class="com.hyb.hibernate.model.Teacher" />
</session-factory> </hibernate-configuration>
Student类
package com.hyb.hibernate.model;
public class Student {
private int id;
private String name;
private int age;
public int getId() {
return id;
}
public void setId(int 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;
}
}
Student.hbm.xml文件，和Student在同一个目录下(Model层下面)，设置的是和数据库表对应的关系
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.hyb.hibernate.model">
<class name="Student">
<id name="id"></id>
<property name="name"></property>
<property name="age"></property>
</class>
</hibernate-mapping>
Student测试类
package com.hyb.hibernate.test; import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration; import com.hyb.hibernate.model.Student; public class hibernateTest {
public static void main(String[] args) {
Student s = new Student();
s.setId(2);
s.setName("hhaha");
s.setAge(22); Configuration cfg = new Configuration();
SessionFactory sf = cfg.configure().buildSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
sf.close();
} }
还有一种通过注解的方式就不用写Teacher.hbm.xml，使用注解的时候要加入注解的3个jar包，
Teacher.java
package com.hyb.hibernate.model; import javax.persistence.Entity;
import javax.persistence.Id; @Entity
public class Teacher { private int id;
private String name;
private String title; @Id
public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getTitle() {
return title;
} public void setTitle(String title) {
this.title = title;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} }
Teacher的测试类
需要在hibernate.cfg.xml里面加入映射关系 <mapping class="com.hyb.hibernate.model.Teacher" />
package com.hyb.hibernate.test; import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration; import com.hyb.hibernate.model.Teacher; public class TeacherTest {
public static void main(String[] args) {
Teacher t = new Teacher();
t.setId(1);
t.setName("nihao");
t.setTitle("中级"); Configuration cfg = new AnnotationConfiguration();
SessionFactory sf = cfg.configure().buildSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
session.save(t);
session.getTransaction().commit();
session.close();
sf.close();
} }
