java.lang.IllegalStateException: Failed to load ApplicationContext(2)

错误提示:
java.lang.IllegalStateException: Failed to load ApplicationContext

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'jdbcUrl' of bean class [org.springframework.jdbc.datasource.DriverManagerDataSource]: Bean property 'jdbcUrl' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'jdbcUrl' of bean class [org.springframework.jdbc.datasource.DriverManagerDataSource]: Bean property 'jdbcUrl' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

Spring内置数据源配置:

<!-- 引入外部属性配置文件-->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置内置的数据源bean，使用db.properties -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClass}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>

c3p0连接池配置:

<!-- c3p0数据源，使用db.properties -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClass}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>

错误原因:注意property中name值为对应class类中的set方法对应的值.

比如: c3p0数据源配置中点进com.mchange.v2.c3p0.ComboPooledDataSource,按Ctrl+O可以查看对应的set方法.