各种数据库在hibernate中的配置

亦凉 2021-10-29 13:04 294阅读 0赞

### 1. MySql连接配置 ###

MySql数据库的 hibernate连接设置，在 hibernate.cfg.xml文件中

<hibernate-configuration>

<session-factory>

<!—为 true表示将 Hibernate发送给数据库的 sql显示出来 \-->

<property name="dialect">net.sf.hibernate.dialect.MySQLDialect</property>

<property name="connection.driver\_class">com.mysql.jdbc.Driver</property>

<property name="connection.url">jdbc:mysql://localhost/dbname?

characterEncoding=gb2312</property>

<!—映射文件 \-->

</session-factory>

</hibernate-configuration>

上面使用的驱动类是 com.mysql.jdbc.Driver.需要将 MySql的连接器 jar包（ eg. mysql-connector-java-

Dbname为数据库名字

5.0.4 \-bin.jar）加入到 classpath中。

经过调试修改配置，正确配置如下：

<table style="font-size:undefined; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(153,153,153); border-right-color:rgb(153,153,153); border-bottom-color:rgb(153,153,153); border-left-color:rgb(153,153,153); border-collapse:collapse; margin-top:6px; margin-right:auto; margin-bottom:6px; margin-left:auto"> 
 <tbody> 
  <tr> 
   <td style="word-break:break-all; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(153,153,153); border-right-color:rgb(153,153,153); border-bottom-color:rgb(153,153,153); border-left-color:rgb(153,153,153)"> 
    <div> 
     <br> 
    </div> 
    <div> 
     <span style="color:#ff0000">&lt;!DOCTYPE hibernate-configuration PUBLIC</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>"-//Hibernate/Hibernate Configuration DTD 3.0//EN"</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000">&lt;hibernate-configuration&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;session-factory&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 各属性的配置 --&gt;&nbsp;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000">&lt;!-- 为 true 表示将 Hibernate 发送给数据库的 sql 显示出来 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="show_sql"&gt;true&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- SQL 方言，这边设定的是 MySQL --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="dialect"&gt;org.hibernate.dialect.MySQLDialect&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 一次读的数据库记录数 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="jdbc.fetch_size"&gt;50&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 设定对数据库进行批量删除 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="jdbc.batch_size"&gt;30&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 驱动程序 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="connection.driver_class"&gt;com.mysql.jdbc.Driver&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- JDBC URL --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="connection.url"&gt;jdbc:mysql://localhost/mydb?</span> 
     <span style="color:rgb(255,0,0); font-size:18px">characterEncoding=gb2312&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 数据库用户名 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="connection.username"&gt;root&lt;/property&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;!-- 数据库密码 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;property name="connection.password"&gt;admin&lt;/property&gt;&nbsp;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000">&lt;!-- 映射文件 --&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;mapping resource="entity/UserInfo.hbm.xml"/&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><span style="white-space:pre"></span>&lt;/session-factory&gt;</span> 
    </div> 
    <div> 
     <span style="color:#ff0000"><br> </span> 
    </div> 
    <div> 
     <span style="color:#ff0000">&lt;/hibernate-configuration&gt;&nbsp;</span> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

### 2. Sql Server连接配置 ###

Sql Server数据库的 hibernate在配置文件中配置。

连接部分

<property name="connection.driver\_class">net.sourceforge.jtds.jdbc.Driver</property>

<property

name="connection.url">jdbc:jtds:sqlserver://localhost:1433;DatabaseName=dbname</property>

上例的驱动类使用的是 jtds的驱动类，因此读者需要将 jtds的 jar包（ eg. jtds-1.2.jar）加入到 classpath中

### 3. Oracle连接配置 ###