Java 在使用@Configuration时,无任何UCHBeandDefinitionException异常
我的处境很奇怪。 我在使用@Configuration和@bean时尝试创建新bean,方法如下:Java 在使用@Configuration时,无任何UCHBeandDefinitionException异常,java,spring,spring-annotations,Java,Spring,Spring Annotations,我的处境很奇怪。 我在使用@Configuration和@bean时尝试创建新bean,方法如下: package com.spring.beans.ParkingCar; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class CarMaker { @Bean
package com.spring.beans.ParkingCar;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class CarMaker
{
@Bean
public CarBean createNewCar()
{
CarBean carBean=new CarBean();
return carBean;
}
}
包com.spring.beans.ParkingCar
import org.apache.log4j.Logger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class CarBean
{
private int x = 3;
static Logger logger = Logger.getLogger(CarBean.class);
public void driveCar()
{
logger.debug("I am driving my car" + x);
}
}
然后我的测试类如下所示:
public static void execute()
{
try
{
PropertyConfigurator.configure("log4j.properties");
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
CarMaker carMaker = (CarMaker) context.getBean("carMaker");
CarBean carBean = carMaker.createNewCar();
carBean.driveCar();
}
catch (Throwable e)
{
logger.error(e);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<!-- Must for auto wiring
<context:annotation-config />
-->
<context:component-scan
base-package="com.spring.beans.ParkingCar">
</context:component-scan>
<aop:aspectj-autoproxy />
<bean id="Spring3HelloWorldBean" class="com.spring.aspect.Spring3HelloWorld">
<property name="myname" value="idan" />
</bean>
<bean id="SecurityAspect" class="com.spring.aspect.SecurityAspect">
</bean>
<bean id="CalculateStrategyBean" class="com.spring.beans.calculator.CalculateStrategyBean">
<constructor-arg value="plus" />
</bean>
<bean id="CalculatorBean" class="com.spring.beans.calculator.CalculatorBean">
<constructor-arg ref="CalculateStrategyBean" />
<constructor-arg ref="CalculateNumbersHolderBean" />
</bean>
<bean id="CalculateNumbersHolderBean" class="com.spring.beans.calculator.CalculateNumbersHolderBean">
<constructor-arg value="10" />
<constructor-arg value="20" />
</bean>
<bean id="lisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="333" p:isValidateCar="true" />
<bean id="AmbulancelisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="999" p:isValidateCar="false" />
<bean id="TransitlisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="111" p:isValidateCar="false" />
<bean id="TransitVechileDetails" class="com.spring.beans.ParkingCar.VechileDetails"
p:modelName="Transit-AS" p:numOfWheels="4" p:year="1992" />
<!-- Wiring without annotations-->
<!--
<bean id="Ambulance"
class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:modelName="GMC" p:numOfWheels="4" p:year="1997"
p:lisenceDrive-ref="AmbulancelisenceDrive" /> <bean id="Bike"
class="com.spring.beans.ParkingCar.TwoWheelsVechile" autowire="byName"
p:modelName="T-BIRD" p:numOfWheels="2" p:year="2012" /> <bean
id="Transit" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:lisenceDrive-ref="TransitlisenceDrive" autowire="constructor">
-->
<bean id="Ambulance" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:modelName="GMC" p:numOfWheels="4" p:year="1997" p:lisenceDrive-ref="AmbulancelisenceDrive" />
<!-- Wiring with annotations
<bean id="Bike" class="com.spring.beans.ParkingCar.TwoWheelsVechile"
autowire="byName" p:modelName="T-BIRD" p:numOfWheels="2" p:year="2012" />
<bean id="Transit" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:lisenceDrive-ref="TransitlisenceDrive">
</bean>
-->
</beans>
我的applicationContext.xml如下所示:
public static void execute()
{
try
{
PropertyConfigurator.configure("log4j.properties");
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
CarMaker carMaker = (CarMaker) context.getBean("carMaker");
CarBean carBean = carMaker.createNewCar();
carBean.driveCar();
}
catch (Throwable e)
{
logger.error(e);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<!-- Must for auto wiring
<context:annotation-config />
-->
<context:component-scan
base-package="com.spring.beans.ParkingCar">
</context:component-scan>
<aop:aspectj-autoproxy />
<bean id="Spring3HelloWorldBean" class="com.spring.aspect.Spring3HelloWorld">
<property name="myname" value="idan" />
</bean>
<bean id="SecurityAspect" class="com.spring.aspect.SecurityAspect">
</bean>
<bean id="CalculateStrategyBean" class="com.spring.beans.calculator.CalculateStrategyBean">
<constructor-arg value="plus" />
</bean>
<bean id="CalculatorBean" class="com.spring.beans.calculator.CalculatorBean">
<constructor-arg ref="CalculateStrategyBean" />
<constructor-arg ref="CalculateNumbersHolderBean" />
</bean>
<bean id="CalculateNumbersHolderBean" class="com.spring.beans.calculator.CalculateNumbersHolderBean">
<constructor-arg value="10" />
<constructor-arg value="20" />
</bean>
<bean id="lisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="333" p:isValidateCar="true" />
<bean id="AmbulancelisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="999" p:isValidateCar="false" />
<bean id="TransitlisenceDrive" class="com.spring.beans.ParkingCar.LisenceDrive"
p:carLisenceNum="111" p:isValidateCar="false" />
<bean id="TransitVechileDetails" class="com.spring.beans.ParkingCar.VechileDetails"
p:modelName="Transit-AS" p:numOfWheels="4" p:year="1992" />
<!-- Wiring without annotations-->
<!--
<bean id="Ambulance"
class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:modelName="GMC" p:numOfWheels="4" p:year="1997"
p:lisenceDrive-ref="AmbulancelisenceDrive" /> <bean id="Bike"
class="com.spring.beans.ParkingCar.TwoWheelsVechile" autowire="byName"
p:modelName="T-BIRD" p:numOfWheels="2" p:year="2012" /> <bean
id="Transit" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:lisenceDrive-ref="TransitlisenceDrive" autowire="constructor">
-->
<bean id="Ambulance" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:modelName="GMC" p:numOfWheels="4" p:year="1997" p:lisenceDrive-ref="AmbulancelisenceDrive" />
<!-- Wiring with annotations
<bean id="Bike" class="com.spring.beans.ParkingCar.TwoWheelsVechile"
autowire="byName" p:modelName="T-BIRD" p:numOfWheels="2" p:year="2012" />
<bean id="Transit" class="com.spring.beans.ParkingCar.FourWheelsVechile"
p:lisenceDrive-ref="TransitlisenceDrive">
</bean>
-->
</beans>
知道为什么它在那里不起作用吗
谢谢。表示一个类声明了一个或多个方法,而@Bean
创建了一个新Bean,该Bean的名称与用@Bean
注释的方法的名称相同在代码示例中,名为
createNewCar
的bean将被创建为方法createNewCar()
方法由@bean
注释
试试这个
CarBean carBean = (CarBean) context.getBean("createNewCar");
carBean.driveCar();
没什么可看的
CarBean
注释为@Configuration
?它不包含任何bean定义,即带有@bean
注释的方法李>
createNewCar()
方法,因为它已经用@Bean
注释了?(让春天来做它的工作)选中此项,它将帮助您熟悉
@配置
和@Bean
注释 您已经创建了一个类型为automobilemaker
且名称为createNewCar
的bean,并且您正在尝试访问名为automobilemaker
的bean,但该bean不存在。为什么automobilemaker不存在?它确实存在。我已经用@Configuration@Configuration
donotcreatebean对它进行了注释。检查我答案中的链接。那么为什么它在MyEclipse中工作得很好呢?这来自MyEclipse Spring日志:2012-07-01 17:42:53737 org.springframework.beans.factory.support.DefaultListableBeanFactory[DEBUG]返回singleton bean'Automomaker'的缓存实例@rayman:检查我的更新答案并浏览提到的链接。你把几件事搞混了。