1.加载.properties文件中的配置参数加载到PropertiesFactoryBean容器中
<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="locations">//本地资源 读取方式,用流读取资源进行加载。
<list>
<value>classpath:config.properties</value>
<value>classpath:redis.properties</value>
</list>
</property>
</bean>
如此,两个properties 的属性变被放入了Spring 的PropertiesFactoryBean中
在此,有一点需要注意,如果在xml中需要用到刚刚配置的属性,我们会去用${“key”}方式去取,此时需要配置“占位符“,
<!--在xml使用properties文件中的的配置数据时,需要用到PropertyPlaceholderConfigurer做占位符-->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="properties">
<ref bean="configProperties"/>
</property>
</bean>
PropertyPlaceholderConfigurer会把配置的properties解析并存放为java标准的properties,此时在xml中我们可以通过${"key"}去取。
2.
<bean name="DatabaseConfigrationFactoryBean" class="com.shopManager.config.DatabaseConfigrationFactoryBean">
<constructor-arg ref="DatabaseConfiguration"/>
</bean> <bean name="DatabaseConfiguration" class="org.apache.commons.configuration.DatabaseConfiguration">
</bean>
/**
* Build a configuration from a table containing multiple configurations.
* No commits are performed by the new configuration instance.
*
* @param datasource the datasource to connect to the database
* @param table the name of the table containing the configurations
* @param nameColumn the column containing the name of the configuration
* @param keyColumn the column containing the keys of the configuration
* @param valueColumn the column containing the values of the configuration
* @param name the name of the configuration
*/
public DatabaseConfiguration(DataSource datasource, String table, String nameColumn,
String keyColumn, String valueColumn, String name)
{
this(datasource, table, nameColumn, keyColumn, valueColumn, name, false);
}
从它的这个构造中我们可以发现需要传入的参数,数据源、表名、名称配置环境的名称、属性名、属性值,配置名称。(可以根据自己需要进行配置)