求助！第一个hibernate程序报错 org.hibernate.MappingException: Unknown entity: com.pojo.User

求助求助
对着案例看了好久- -找不到哪里不对，为什么报错了呢，

工程目录

hibernate.cfg.xml

<hibernate-configuration>
    <session-factory>
        
        <property name="connection.driver_class">com.mysql.jdbc.Driverproperty>
        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate4property>
        <property name="connection.username">rootproperty>
        <property name="connection.password">123456property>
        <property name="dialect">org.hibernate.dialect.MySQL5Dialectproperty>

        <mapping resource="com/pojo/User.hbm.xml"/>
    session-factory>
hibernate-configuration>

User.java

package com.pojo;

public class User {
    private int id;
    private String name;
    private String pwd;

    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 String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

User.hbm.xml

<hibernate-mapping>
    <class name="com.pojo.User_po" table="user">
        <id name="id">
            <generator class="native">generator>
        id>
        <property name="name"/> 
        <property name="pwd"/>  
    class>
hibernate-mapping>

Test.java

package com.test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

import com.pojo.User;

public class Test {
    public static void main(String[] args) {

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

        ServiceRegistry sr=new StandardServiceRegistryBuilder()
                               .applySettings(cfg.getProperties())
                               .build();
        SessionFactory sf=cfg.buildSessionFactory(sr);

        Session session=sf.openSession();

        Transaction tx=session.beginTransaction();

        User user=new User();
        user.setName("hibernate测试");
        user.setPwd("admin");

        session.save(user);

        tx.commit();

        session.close();            
    }
}

数据库

错误信息

Exception in thread "main" org.hibernate.MappingException: Unknown entity: com.pojo.User
    at org.hibernate.metamodel.internal.MetamodelImpl.entityPersister(MetamodelImpl.java:620)
    at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1627)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:104)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
    at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
    at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
    at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:682)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:674)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:669)
    at com.test.Test.main(Test.java:36)