使用EJB使用jboss7.0中配置数据源

使用EJB时需要配置数据源，光在代码里面添加配置是不够的，还需要在jboss中配置
首先在jboss-as-web-7.0.2.Final\standalone\configuration目录下standalone.xml中<datasources>标签中添加你的数据源配置：
这里drivername是mysql

<datasource jndi-name="java:jboss/datasources/localTrans/FirstTest" pool-name="localTrans_FirstTest" enabled="true" jta="true" use-java-context="true" use-ccm="true">
                    <connection-url>
                        jdbc:mysql://127.0.0.1:3306/jsftest
                    </connection-url>
                    <connection-property name="zeroDateTimeBehavior">
                        round
                    </connection-property>
                    <connection-property name="connectTimeout">
                        180000
                    </connection-property>
                    <connection-property name="socketTimeout">
                        180000
                    </connection-property>
                    <connection-property name="characterEncoding">
                        UTF-8
                    </connection-property>
                    <connection-property name="autoReconnectForPools">
                        true
                    </connection-property>
                    <driver>
                        mysql
                    </driver>
                    <pool>
                        <min-pool-size>
                            0
                        </min-pool-size>
                        <max-pool-size>
                            50
                        </max-pool-size>
                        <prefill>
                            false
                        </prefill>
                        <use-strict-min>
                            false
                        </use-strict-min>
                        <flush-strategy>
                            EntirePool
                        </flush-strategy>
                    </pool>
                    <security>
                        <user-name>
                            root
                        </user-name>
                        <password>
                            root
                        </password>
                    </security>
                    <validation>
                        <check-valid-connection-sql>
                            select 1
                        </check-valid-connection-sql>
                        <validate-on-match>
                            false
                        </validate-on-match>
                        <background-validation>
                            true
                        </background-validation>
                        <background-validation-millis>
                            1800000
                        </background-validation-millis>
                        <use-fast-fail>
                            false
                        </use-fast-fail>
                    </validation>
                    <timeout>
                        <idle-timeout-minutes>
                            5
                        </idle-timeout-minutes>
                        <query-timeout>
                            120
                        </query-timeout>
                    </timeout>
                    <statement>
                        <track-statements>
                            TRUE
                        </track-statements>
                        <prepared-statement-cache-size>
                            100
                        </prepared-statement-cache-size>
                        <share-prepared-statements/>
                    </statement>
                </datasource>

添加<drivers>下添加driver:

<driver name="mysql" module="com.mysql"/>

然后在modules\com文件夹下建立mysql\main文件夹
main里面添加驱动jar包以及module.xml文件：
path为jar包名，name为上面的module值
这一段可以把modules\com\h2database\h2\main中的module.xml文件复制过来就行修改

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

<module xmlns="urn:jboss:module:1.0" name="com.mysql">
  <resources>
    <resource-root path="mysql-connector-java-5.1.21-bin.jar"/>
        <!-- Insert resources here -->
  </resources>
  <dependencies>
    <module name="javax.api"/>
    <module name="javax.transaction.api"/>
  </dependencies>
</module>