applicationContext.xml文件关键代码配置如下
<!-- 定义受环境影响易变的变量 -->
<context:property-placeholder location="classpath*:application.properties" /> <bean id="configBean"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath*:application.properties</value>
</property>
</bean>
<bean id="masterDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
parent="parentDataSource">
<property name="driverClass" value="${jdbc.driver}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
application.properties配置如下
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://......
jdbc.username=root
jdbc.password=123456
启动不报错,到登录获取数据库链接是报错如下:2012-06-07 11:50:19,832 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] WARN [com.mchange.v2.c3p0.DriverManagerDataSource] - Could not load driverClass ${jdbc.driver}
java.lang.ClassNotFoundException: ${jdbc.driver}
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1493)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
多谢格纹大虾指教。。
<!-- 定义受环境影响易变的变量 -->
<context:property-placeholder location="classpath*:application.properties" /> <bean id="configBean"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath*:application.properties</value>
</property>
</bean>
<bean id="masterDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
parent="parentDataSource">
<property name="driverClass" value="${jdbc.driver}" />
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
application.properties配置如下
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://......
jdbc.username=root
jdbc.password=123456
启动不报错,到登录获取数据库链接是报错如下:2012-06-07 11:50:19,832 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] WARN [com.mchange.v2.c3p0.DriverManagerDataSource] - Could not load driverClass ${jdbc.driver}
java.lang.ClassNotFoundException: ${jdbc.driver}
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1493)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
多谢格纹大虾指教。。
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这么明显。
看属性文件里面是否有driver属性 , 是否有写错。如果没问题
再检查驱动包 是否有拷到项目里面
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://......
jdbc.username=root
jdbc.password=123456
这里明显配置了?而且是复制过去的 ,不可能写错,驱动包没问题。已经考进去运行几个月了。。<bean id="masterDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
parent="parentDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value=",,," />
<property name="user" value="122" />
<property name="password" value="123" />
</bean>
因为这样写死的是运行几个月了
我认为是哪里配置错了
不过还是多谢楼上大虾
<context:property-placeholder location="classpath*:application.properties" /> 改成:
<!-- 定义受环境影响易变的变量 -->
<context:property-placeholder location="classpath:application.properties" />
context:property-placeholder location="classpath*:application.properties" /><bean id="configBean"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath*:application.properties</value>
</property>
</bean>
你不觉得冲突吗
context:property-placeholder location="classpath*:application.properties" />表示加载类路径下的所有application.properties;
<bean id="configBean"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath*:application.properties</value>
</property>也是相同的道理两者留其一即可
<value>classpath*:application.properties</value>
</property>
是不是这样的啊
<property name="location">
<value>classpath*:application.properties</value>
</property>或者
<property name="location">
<list>
<value>classpath*:application.properties</value>
</list>
</property>
to: m540920181 你那个不对的。。不用试了。。多谢你
<bean id="parentDataSource" abstract="true" destroy-method="close">
<property name="minPoolSize">
<value>10</value>
</property>
<property name="maxPoolSize">
<value>100</value>
</property>
<property name="initialPoolSize">
<value>10</value>
</property>
<property name="maxIdleTime">
<value>60</value>
</property>
<property name="acquireIncrement">
<value>5</value>
</property> <property name="idleConnectionTestPeriod">
<value>50</value>
</property>
<property name="acquireRetryAttempts">
<value>30</value>
</property>
<property name="breakAfterAcquireFailure">
<value>true</value>
</property> <property name="numHelperThreads">
<value>5</value>
</property>
<property name="acquireRetryDelay">
<value>500</value>
</property>
<property name="autoCommitOnClose">
<value>true</value>
</property>
<property name="propertyCycle">
<value>300</value>
</property>
<property name="checkoutTimeout">
<value>8000</value>
</property>
</bean>
<property name="locations">
<list>
<value>classpath:database/datebase.properties</value>
<value>classpath:hibernate.properties</value>
</list>
</property>
</bean>
仅供参考
<!-- property name="sqlSessionFactory" ref="sqlSessionFactory" / -->
<property name="basePackage" value="com.yougou.*.dao" />
</bean>问题找到了,是因为多配置了这个,<!-- property name="sqlSessionFactory" ref="sqlSessionFactory" / -->注释掉这个就可以了。。多谢啦。。
<!-- property name="sqlSessionFactory" ref="sqlSessionFactory" / -->
这个不写的话 启动都报错了