最后配置文件的内容：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> <session-factory > <property>oracle.jdbc.driver.OracleDriver</property> <property>123456</property> <property>jdbc:oracle:thin:@localhost:1521:xe</property> <property>test</property> <property>test</property> <property>org.hibernate.dialect.Oracle10gDialect</property> <property>true</property> <!-- 第一次加载hibernate时根据model类会自动建立起表的结构（前提是先建立好数据库），以后加载hibernate时根据 model类自动更新表结构，即使表结构改变了但表中的行仍然存在不会删除以前的行。要注意的是当部署到服务器后，表结构是不会被马上建立起来的，是要等 应用第一次运行起来后才会。 --> <property>update</property> <property>true</property> <property>pojo</property> <mapping/> </session-factory> </hibernate-configuration>Emp.java
package mytest001.demo; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="T_EMP") public class Emp { // 员工的标识属性 @Id @GeneratedValue(strategy=GenerationType.SEQUENCE) private Integer id; // 姓名 private String name; // 年龄 private Integer age; // 工资 （分） private Integer salary; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public Integer getSalary() { return salary; } public void setSalary(Integer salary) { this.salary = salary; } @Override public String toString() { return "Emp [id=" + id + ",, age=" + age + ", salary=" + salary + "]"; } }最后的工程结构如下：
运行EmpManger
十一月 23, 2019 8:50:47 上午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> INFO: HCANN000001: Hibernate Commons Annotations {4.0.4.Final} 十一月 23, 2019 8:50:47 上午 org.hibernate.Version logVersion INFO: HHH000412: Hibernate Core {4.3.5.Final} 十一月 23, 2019 8:50:47 上午 org.hibernate.cfg.Environment <clinit> INFO: HHH000206: hibernate.properties not found 十一月 23, 2019 8:50:47 上午 org.hibernate.cfg.Environment buildBytecodeProvider INFO: HHH000021: Bytecode provider name : javassist 十一月 23, 2019 8:50:47 上午 org.hibernate.cfg.Configuration configure INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml 十一月 23, 2019 8:50:47 上午 org.hibernate.cfg.Configuration getConfigurationInputStream INFO: HHH000040: Configuration resource: /hibernate.cfg.xml 十一月 23, 2019 8:50:47 上午 org.hibernate.cfg.Configuration doConfigure INFO: HHH000041: Configured SessionFactory: null 十一月 23, 2019 8:50:47 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!) 十一月 23, 2019 8:50:47 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH000401: using driver [oracle.jdbc.driver.OracleDriver] at URL [jdbc:oracle:thin:@localhost:1521:xe] 十一月 23, 2019 8:50:47 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH000046: Connection properties: {user=test, password=****} 十一月 23, 2019 8:50:47 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator INFO: HHH000006: Autocommit mode: false 十一月 23, 2019 8:50:47 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure INFO: HHH000115: Hibernate connection pool size: 20 (min=1) 十一月 23, 2019 8:50:48 上午 org.hibernate.dialect.Dialect <init> INFO: HHH000400: Using dialect: org.hibernate.dialect.Oracle10gDialect 十一月 23, 2019 8:50:48 上午 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService INFO: HHH000399: Using default transaction strategy (direct JDBC transactions) 十一月 23, 2019 8:50:48 上午 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init> INFO: HHH000397: Using ASTQueryTranslatorFactory 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute INFO: HHH000228: Running hbm2ddl schema update 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute INFO: HHH000102: Fetching database metadata 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute INFO: HHH000396: Updating schema 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata INFO: HHH000262: Table not found: T_EMP 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata INFO: HHH000262: Table not found: T_EMP 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata INFO: HHH000262: Table not found: T_EMP 十一月 23, 2019 8:50:48 上午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute INFO: HHH000232: Schema update complete Hibernate: select test.hibernate_sequence.nextval from dual Hibernate: insert into test.T_EMP (age, name, salary, id) values (?, ?, ?, ?) 十一月 23, 2019 8:50:48 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop INFO: HHH000030: Cleaning up connection pool [jdbc:oracle:thin:@localhost:1521:xe]到数据库中查询表：(这个表会被自动创建)
select * from t_emp;