JPA生成表问题


在@Table那一行出现The table TestUser cannot be found on the database这个错误，我是要让其在代码运行时产生表
package com.testjpa;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;@ Entity
@Table(name="TestUser",schema="SCOTT" )
public class TestUser implements java.io.Serializable{ private String username;
private String pwd;
private String usermail; // Constructors /** default constructor */
public TestUser() {
} /** minimal constructor */
public TestUser(String username) {
this.username = username;
} /** full constructor */
public TestUser(String username, String pwd, String usermail) {
this.username = username;
this.pwd = pwd;
this.usermail = usermail;
} // Property accessors
@Id
@Column(name = "USERNAME", unique = true, nullable = false, length = 30)
public String getUsername() {
return this.username;
} public void setUsername(String username) {
this.username = username;
} @Column(name = "PWD", length = 30)
public String getPwd() {
return this.pwd;
} public void setPwd(String pwd) {
this.pwd = pwd;
} @Column(name = "USERMAIL", length = 30)
public String getUsermail() {
return this.usermail;
} public void setUsermail(String usermail) {
this.usermail = usermail;
}
}
配置文件、
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
    http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
    
<persistence-unit name="TestJPAPU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.testjpa.TestUser</class>
   <properties>
       <property name="hibernate.hbm2ddl.auto" value="update" />
       <property name="hibernate.hbm2ddl.auto" value="create"/>
<property name = "hibernate.connection.driver_class" value = "oracle.jdbc.OracleDriver"/>
<property name = "hibernate.connection.url" value = "jdbc:oracle:thin:@127.0.0.1:1521:ORCL"/>
<property name = "hibernate.connection.username" value = "scott"/>
<property name = "hibernate.connection.password" value = "123"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9Dialect"/>
<property name="hibernate.show_sql" value="true"/>
   </properties>
</persistence-unit>
  
</persistence>
测试代码
package com.testjpa;import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;import org.junit.BeforeClass;
import org.junit.Test;public class JunitTest {
@BeforeClass
public static void setUpBeforeClass() throws Exception {
} //测试
@Test public void save()
{
EntityManagerFactory emf = Persistence.createEntityManagerFactory("TestJPAPU");
     emf.close(); 
}
}