学步园

1.将数据库驱动jar包拷贝到D:\DevelopTool\jboss-4.2.2.GA\server\default\lib下面

2.将D:\DevelopTool\jboss-4.2.2.GA\docs\examples\jca下面的数据库配置模板拷到D:\DevelopTool\jboss-4.2.2.GA\server\default\deploy下面，并修改数据库名以及登陆名和密码。

例如：

<?xml version="1.0" encoding="UTF-8"?>

<!-- $Id: mysql-ds.xml 63175 2007-05-21 16:26:06Z rrajesh $ -->
<!--  Datasource config for MySQL using 3.0.9 available from:

http://www.mysql.com/downloads/api-jdbc-stable.html

-->

<datasources>
  <local-tx-datasource>
    <jndi-name>member</jndi-name>
    <connection-url>jdbc:mysql://localhost:3306/member</connection-url>
    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <user-name>root</user-name>
    <password>root</password>
    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
    <!-- should only be used on drivers after 3.22.1 with "ping" support
    <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>
    -->
    <!-- sql to call when connection is created
    <new-connection-sql>some arbitrary sql</new-connection-sql>
      -->
    <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers
    <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
      -->

    <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml -->
    <metadata>
       <type-mapping>mySQL</type-mapping>
    </metadata>
  </local-tx-datasource>
</datasources>

3.启动JBOSS,看是否有什么异常。

 

4.配置persistence.xml

  具体可以通过myeclipse新建EJB项目，在向导时进行初始化设置。

（1）每个持久化单元相当于一个数据库

  （2）JNDI Data Source时在刚才那个mysql-ds.xml里面的<jndi-name>member</jndi-name>的

        名字前加java:/ ;后边的EntityManager要用到。

  （3）取消Special JPA DataSource details复选框