hibernate使用

古城微笑少年丶 2021-10-19 03:32 336阅读 0赞

**hibernate使用（只讲述了配置大纲）**

1.配置文件

hibernate.cfg.xml 类似（mybatis-config.xml）作用 根据系统自行放置

默认应放置在编译目录下

请注意一点

![CDATA[]] 可以将&&这种符号反义

<?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>
        
            
             
            <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
             
            <property name="hibernate.connection.url"><![CDATA[jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false]]></property>
             
            <property name="hibernate.connection.username">root</property>
             
            <property name="hibernate.connection.password">root</property>
            
            <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
            
            
            
            
            <property name="hibernate.show_sql">true</property>
            
            <property name="hibernate.format_sql">true</property>
            
            <property name="hibernate.hbm2ddl.auto">update</property>
            
            <mapping resource="hibernate/UserInfo.hbm.xml"/>
            
        </session-factory>
    </hibernate-configuration>

使用Demo 参考jdbc连接步骤

Configuration conf = new Configuration().configure();

自行点进源码可以看到

public Configuration configure() throws HibernateException {
       
        return this.configure("hibernate.cfg.xml");
    }
    这就是读取配置文件
    
    可自行整理工具类

package com.hope.hibernate.common;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.cfg.Configuration;
    
    public class HibernateUtils {
    	private static SessionFactory sf;
    	
    	static{
    		//1 创建,调用空参构造
    		Configuration conf = new Configuration().configure();
    		//2 根据配置信息,创建 SessionFactory对象
    		 sf = conf.buildSessionFactory();
    	}
    	
    	//获得session => 获得全新session
    	public static Session openSession(){
    				//3 获得session
    				Session session = sf.openSession();
    				
    				return session;
    		
    	}
    	//获得session => 获得与线程绑定的session
    	public static Session getCurrentSession(){
    		//3 获得session
    		Session session = sf.getCurrentSession();
    		
    		return session;
    	}
    	public static void main(String[] args) {
    		System.out.println(HibernateUtils.openSession());
    	}
    	
    }

package com.hope.hibernate.test;
    
            import com.hope.hibernate.domain.UserInfoBean;
            import org.hibernate.Session;
            import org.hibernate.SessionFactory;
            import org.hibernate.Transaction;
            import org.hibernate.cfg.Configuration;
    
    /**
     * Demo
     *
     * @author zhougf
     * @date 2019/7/19
     */
    public class Demo {
        public static void main(String[] args) {
            //创建配置
            Configuration conf = new Configuration().configure();
            //获取工厂
            SessionFactory sessionFactory = conf.buildSessionFactory();
            //开启session
            Session session = sessionFactory.openSession();
            //开启事务
            Transaction tx = session.beginTransaction();
    //        UserInfoBean userInfoBean = new UserInfoBean();
    //        userInfoBean.setUserName("xxx");
    //        userInfoBean.setUserPassword("x545");
    //        userInfoBean.setUserPhone("123456451");
    //        userInfoBean.setUserStatus("02");
    //        session.save(userInfoBean);
    //        UserInfoBean userInfoBean = session.get(UserInfoBean.class,1);
            tx.commit();
            session.close();
            sessionFactory.close();
        }
    }

bean

package com.hope.hibernate.domain;
    
    import java.io.Serializable;
    import java.util.Date;
    
    /**
     * UserInfoBean
     *
     * @author zhougf
     * @date 2019/05/29
     */
    public class UserInfoBean implements Serializable {
        private static final long SERIALIZABLEID = 1L;
        private Integer userId;
    
        private String userName;
    
        private String userPassword;
    
        private String userPhone;
    
        private String userStatus;
    
        private String userType;
    
        private String spare1;
    
        private String spare2;
    
        private String spare3;
    
        private Date createTime;
    
        private Date updateTime;
    
        public UserInfoBean() {}
    
        public UserInfoBean(String userName, String userPassword) {
            this.userName = userName;
            this.userPassword = userPassword;
        }
    
        public Integer getUserId() {
            return userId;
        }
    
        public void setUserId(Integer userId) {
            this.userId = userId;
        }
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName;
        }
    
        public String getUserPassword() {
            return userPassword;
        }
    
        public void setUserPassword(String userPassword) {
            this.userPassword = userPassword;
        }
    
        public String getUserPhone() {
            return userPhone;
        }
    
        public void setUserPhone(String userPhone) {
            this.userPhone = userPhone;
        }
    
        public String getUserStatus() {
            return userStatus;
        }
    
        public void setUserStatus(String userStatus) {
            this.userStatus = userStatus;
        }
    
        public String getUserType() {
            return userType;
        }
    
        public void setUserType(String userSystem) {
            this.userType = userSystem;
        }
    
        public String getSpare1() {
            return spare1;
        }
    
        public void setSpare1(String spare1) {
            this.spare1 = spare1;
        }
    
        public String getSpare2() {
            return spare2;
        }
    
        public void setSpare2(String spare2) {
            this.spare2 = spare2;
        }
    
        public String getSpare3() {
            return spare3;
        }
    
        public void setSpare3(String spare3) {
            this.spare3 = spare3;
        }
    
        public Date getCreateTime() {
            return createTime;
        }
    
        public void setCreateTime(Date createTime) {
            this.createTime = createTime;
        }
    
        public Date getUpdateTime() {
            return updateTime;
        }
    
        public void setUpdateTime(Date updateTime) {
            this.updateTime = updateTime;
        }
    }

映射文件

注意的是id

<?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.hope.hibernate.domain" >
        
        <class name="UserInfoBean" table="wc_user_info">
            
            <id name="userId" column="user_id">
                
                <generator class="native"></generator>
            </id>
            
            <property name="userName" column="user_name"></property>
            <property name="userPassword" column="user_password"></property>
            <property name="userPhone" column="user_phone"></property>
            <property name="userStatus" column="user_status"></property>
            <property name="userType" column="user_type"></property>
        </class>
    </hibernate-mapping>

本文章只提供了 使用样例

转载于:https://www.cnblogs.com/zhougf/p/11225884.html