关于Druid 对 SQL Server 2008数据源配置的问题：报错

@wenshao 你好，想跟你请教个问题：

使用druid进行sql server 2008 数据源配置时异常，在oschina上查找了，好像还没有同学使用sql server 进行数据源配置

配置如下

<bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
		<!-- 基本属性配置 -->
		<property name="url" value="${datasource.url}"/>
		<property name="username" value="${datasource.username}"/>
		<property name="password" value="${datasource.password}"/>
		
		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="10" />
		<property name="minIdle" value="5" /> 
	    <property name="maxActive" value="20" />
	    
	    <!-- 配置获取连接等待超时的时间 -->
      	<property name="maxWait" value="60000" />
      	
      	<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
      	<property name="timeBetweenEvictionRunsMillis" value="60000" />
      	
      	<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
     	<property name="minEvictableIdleTimeMillis" value="300000" />
     	<!-- 
     	<property name="validationQuery" value="SELECT 'x'" />
      	<property name="testWhileIdle" value="true" />
      	<property name="testOnBorrow" value="false" />
      	<property name="testOnReturn" value="false" />
      	-->
      	
      	<!-- 打开PSCache，并且指定每个连接上PSCache的大小
      	<property name="poolPreparedStatements" value="false" />
      	<property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
      	 -->
      	<!-- 配置监控统计拦截的filters -->
      	<property name="filters" value="stat,wall" />
      	
      	<!-- 合并sql -->
      	<property name="proxyFilters">
      		<list>
      			<ref bean="stat-filter"/>
      		</list>
      	</property>
	</bean>

抛出错误信息如下：

SEVERE: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'druidDataSource' defined in URL [file:/D:/tomcat/webapps/ZDHKProject/WEB-INF/classes/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: dbType not support : null, url jdbc:sqlserver://localhost:1433;databaseName=zkdb
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1113)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1671)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.IllegalStateException: dbType not support : null, url jdbc:sqlserver://localhost:1433;databaseName=zkdb
	at com.alibaba.druid.wall.WallFilter.init(WallFilter.java:130)
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:511)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1581)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1522)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
	... 26 more