Java基础103 Hibernate技术连接MySQL数据和Oracle数据库的配置方法

Posted 2021-03-13 DSHORE

1、Hibernate技术连接mysql数据  

User.hbm.xml 配置文件

<?xml version="1.0"?>
<!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.shore.entity">
    <class name="User" table="user">  
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="account" type="java.lang.String"/> 
        <property name="password" type="java.lang.String"/>
    </class>
</hibernate-mapping>

Hibernate.cfg.xml 配置文件

 1 <?xml version=\'1.0\' encoding=\'utf-8\'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7 
 8     <session-factory>
 9         <!-- Database connection settings -->
10         <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
11         <property name="connection.url">jdbc:mysql://localhost:3306/shore</property>
12         <property name="connection.username">zhangsan</property>
13         <property name="connection.password">123456</property>
14 
15         <!-- JDBC connection pool (use the built-in) -->
16         <!-- <property name="connection.pool_size">1</property> -->
17 
18         <!-- SQL dialect -->
19         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
20 
21         <!-- Enable Hibernate\'s automatic session context management -->
22         <!-- <property name="current_session_context_class">thread</property> -->
23 
24         <!-- Disable the second-level cache -->
25         <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
26 
27         <!-- Echo all executed SQL to stdout -->
28         <property name="show_sql">true</property>
29         <property name="format_sql">true</property>
30 
31         <!-- Drop and re-create the database schema on startup -->
32         <property name="hbm2ddl.auto">update</property>
33         
34         
35         <!-- 注解版配置 -->
36         <!-- <mapping class="com.shore.entity.User" /> -->
37         
38         <!-- xml版配置 -->
39         <mapping resource="com/shore/entity/User.hbm.xml" />
40     </session-factory>
41 </hibernate-configuration>

2、Hibernate技术连接Oracle数据   

User.hbm.xml 配置文件

 1 <?xml version="1.0"?>
 2 <!DOCTYPE hibernate-mapping PUBLIC
 3         "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 4         "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 5         
 6 <hibernate-mapping package="com.shore.entity">
 7     <class name="User" table="users">  
 8         <id name="id">
 9             <generator class="sequence">
10                 <param name="sequence">users_seq</param>
11             </generator>
12         </id>
13         <property name="account" type="java.lang.String"/> 
14         <property name="password" type="java.lang.String"/>
15     </class>
16 </hibernate-mapping>

Hibernate.cfg.xml 配置文件

 1 <?xml version=\'1.0\' encoding=\'utf-8\'?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 5 
 6 <hibernate-configuration>
 7 
 8     <session-factory>
 9         <!-- Database connection settings -->
10         <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
11         <property name="connection.url">jdbc:oracle:thin:@localhost:1521:shoreid</property>
12         <property name="connection.username">zhangsan</property>
13         <property name="connection.password">123456</property>
14 
15         <!-- JDBC connection pool (use the built-in) -->
16         <!-- <property name="connection.pool_size">1</property> -->
17 
18         <!-- SQL dialect -->
19         <property name="dialect">org.hibernate.dialect.OracleDialect</property>
20 
21         <!-- Enable Hibernate\'s automatic session context management -->
22         <!-- <property name="current_session_context_class">thread</property> -->
23 
24         <!-- Disable the second-level cache -->
25         <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
26 
27         <!-- Echo all executed SQL to stdout -->
28         <property name="show_sql">true</property>
29         <property name="format_sql">true</property>
30 
31         <!-- Drop and re-create the database schema on startup -->
32         <property name="hbm2ddl.auto">update</property>
33         
34         
35         <!-- 注解版配置 -->
36         <!-- <mapping class="com.shore.entity.User" /> -->
37         
38         <!-- xml版配置 -->
39         <mapping resource="com/shore/entity/User.hbm.xml" />
40     </session-factory>
41 </hibernate-configuration>

注意：数据库名是shore，该数据库的SID是shoreid。

  其中，命令行窗口和Oracle的PLSQL Developer默认是以全局数据库名的形式来登录，即：sqlplus zhangsan/123456@shore
  而Java代码连接时，是以该全局数据库的SID的形式来登录，即：url=jdbc:oracle:thin:@localhost:1521:shoreid

这要看你在创建数据库时的设置，全局数据库名和SID可以设置一样。

MySQL数据和Oracle数据库“连接池”的配置文件的不同之处：

 

 

 

 

 

 

原创作者：DSHORE 作者主页：http://www.cnblogs.com/dshore123/ 原文出自：https://www.cnblogs.com/dshore123/p/12243991.html 版权声明：欢迎转载，转载务必说明出处。（如果本文对您有帮助，可以点击一下右下角的 推荐，或评论，谢谢！）