persistence配置

persistence.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?>
    <!-- Persistence deployment descriptor for dev profile -->
<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="test">
        <jta-data-source>java:/TestMySqlDS</jta-data-source>
        <properties>
            <property name="hibernate.hbm2ddl.auto" value="create" />
            <property name="hibernate.show_sql" value="false" />
        </properties>
    </persistence-unit>
</persistence>

test-ds.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE datasources
    PUBLIC "-//JBoss//DTD JBOSS JCA Config 5.0//EN"
    "http://www.jboss.org/j2ee/dtd/jboss-ds_5_0.dtd">
<datasources>
    <local-tx-datasource>
        <jndi-name>TestMySqlDS</jndi-name>
        <use-java-context>false</use-java-context>
        <connection-url>jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf8&amp;autoReconnectForPools=true&amp;failOverReadOnly=false</connection-url>
        <driver-class>com.mysql.jdbc.Driver</driver-class>
        <transaction-isolation>TRANSACTION_REPEATABLE_READ</transaction-isolation>
        <user-name>appuser</user-name>
        <password>appuser</password>
        <exception-sorter-class-name>com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter</exception-sorter-class-name>
        <metadata>
            <type-mapping>mySQL</type-mapping>
        </metadata>
    </local-tx-datasource>
</datasources>

说明：如果应用发布在JBOSS下数据源名称一定要以：java:/为前缀，数据源的大小写敏感，persistence.xml和test-ds.xml都是放置在META-INF目录下面，同时数据源配置文件一定要命名为：XXX-ds.xml（一般命名为：数据库名+-ds.xml）的形式，