通过@Value注解读取.properties配置内容

@Controller
@RequestMapping("/value")
public class ValuePropertyController extends ApplicationController{
    
	@Value("#{configProperties['jdbc.jdbcUrl']}")
	private String jdbcUrl; 
	
	@RequestMapping
	public String value(){
		System.out.println(jdbcUrl);
		return "";
	}
}

applicationContext.xml

<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
       <property name="locations">
           <list>
               <value>classpath:database.properties</value>
           </list>
       </property>
    </bean>
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
        <property name="properties" ref="configProperties" />
    </bean>

database.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/commentDemo?useUnicode=true&characterEncoding=UTF-8