1、实体类Student.java
package model;
public class Student {
private Integer stu_Id;
private String stu_Name;
private String stu_Address;
public Integer getStu_Id() {
return stu_Id;
}
public void setStu_Id(Integer stu_Id) {
this.stu_Id = stu_Id;
}
public String getStu_Name() {
return stu_Name;
}
public void setStu_Name(String stu_Name) {
this.stu_Name = stu_Name;
}
public String getStu_Address() {
return stu_Address;
}
public void setStu_Address(String stu_Address) {
this.stu_Address = stu_Address;
}
@Override
public String toString() {
return "Stduent [stu_Id=" + stu_Id + ", stu_Name=" + stu_Name + ", stu_Address=" + stu_Address + "]";
}
}
2、实体类配置文件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>
<!-- javabean与表之间的对应关系 -->
<class name="model.Student" table="student">
<!-- 主键对应 -->
<id name="stu_Id" column="stuID">
<!-- 主键策略(与自增长相关) -->
<!-- hibernate框架来产生主键 整形 -->
<!-- increment 在多线程情况下不能用这种方式 -->
<!-- identity 主键由数据库产生,适用于mysql -->
<!-- oracle 主键由数据库产生,适用于oracle -->
<!-- uuid 产生32位随机数,String类型,可以在多线程情况下使用-->
<!-- assigned:唯一的自然主键生成方式,需要手动去设置主键-->
<generator class="native"></generator>
</id>
<!-- 其他字段 -->
<property name="stu_Name" column="stuName"></property>
<property name="stu_Address" column="stuAddress"></property>
</class>
</hibernate-mapping>
3、创建工具类HibernateUtils.java
package util;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
//使用一个静态块创建SessionFactory
private static Configuration CONFIG;
private static SessionFactory FACTORY;
static {
CONFIG = new Configuration().configure();
FACTORY = CONFIG.buildSessionFactory();
}
//从连接池中获取连接
public static Session openSession() {
return FACTORY.openSession();
}
//session绑定到线程
public static Session getCurrentSession() {
return FACTORY.getCurrentSession();
}
}
4、配置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>
<!-- 配置连接信息 -->
<session-factory>
<!-- 必选配置 -->
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">1234</property>
<!-- 数据库方言 使用的数据库类型 -->
<property name="hibernate.dialect org.hibernate.dialect.MySQLDialect"></property>
<!-- 可选配置 -->
<!-- 显示sql -->
<property name="hibernate.show_sql">true</property>
<!-- 格式化sql -->
<property name="hibernate.format_sql">true</property>
<!-- 配置c3p0连接池 -->
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<!-- 最小连接数 -->
<property name="hibernate.c3p0.min_size">5</property>
<!-- 最大连接数 -->
<property name="hibernate.c3p0.max_size">20</property>
<!-- 最大空闲连接120秒 -->
<property name="hibernate.c3p0.timeout">120</property>
<!-- 自动建表 删除,创建,删除:creat-drop 创建:creat 如果没有表就创建,有就同步:update(一般使用) 验证类和数据表结构是否一致:validate-->
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- 把session绑定到当前线程,使用getCurrentSession获取当前session -->
<property name="hibernate.current_session_context_class">thread</property>
<!-- 映射文件 -->
<mapping resource="model/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
5、编写测试类 TestQBC.java
package test;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;
import org.hibernate.loader.criteria.CriteriaQueryTranslator;
import org.junit.Test;
import model.Student;
import util.HibernateUtils;
public class TestQBC {
/**
* 不带条件的查询
*/
@Test
public void test01() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
}
/**
* 模糊查询like
*/
@Test
public void test02() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
//2.设置条件
c.add(Restrictions.like("stu_Name", "%熊%"));
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
tr.commit();
}
/**
* and 多条件查询
*/
@Test
public void test03() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
//2.设置条件
c.add(Restrictions.like("stu_Name", "%熊%"));
//设置第二个条件
c.add(Restrictions.like("stu_Address","北京"));
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
tr.commit();
}
/**
* or 多条件查询
*/
@Test
public void test04() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
//2.设置条件 名字带熊或地址为北京的
c.add(Restrictions.or(Restrictions.like("stu_Name","%熊%"),Restrictions.like("stu_Address", "北京")));
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
tr.commit();
}
/**
* between...and 多条件查询
*/
@Test
public void test05() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
//2.设置条件 id在10005到10015之间
c.add(Restrictions.between("stu_Id", 0, 10015));
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
tr.commit();
}
/**
* 分页
*/
@Test
public void test06() {
//1.创建对象
Session session = HibernateUtils.openSession();
Transaction tr = session.beginTransaction();
Criteria c = session.createCriteria(Student.class);
//参考mysql的分页 limit index size
//index 从哪一条记录开始 索引
//size 每页数据大小
c.setFirstResult(2);//第三条记录
c.setMaxResults(2);//每页数据
List<Student> students = c.list();
for(Student student : students) {
System.out.println(student);
}
tr.commit();
}
}