[英]@Qualifier not working in spring 5.0.6
@Qualifier("id") is now working. @Qualifier(“ id”)现在正在工作。 It is showing
它显示
No qualifying bean of type 'beans.Engine_AutoAnno' available: expected single matching bean but found 2: e,e1
没有可用的'beans.Engine_AutoAnno'类型的合格Bean:预期为单个匹配的Bean,但找到了2:e,e1
This is my Engine_AutoAnno.java 这是我的Engine_AutoAnno.java
package beans;
public class Engine_AutoAnno {
private String model;
public void setModel(String model) {
this.model = model;
}
public String getModel() {
return model;
}
}
This is my Car_AutoAnno.java 这是我的Car_AutoAnno.java
package beans;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
public class Car_AutoAnno {
@Autowired
@Qualifier("e")
private Engine_AutoAnno engine;
public void printCar() {
System.out.println("Car engine: "+engine.getModel());
}
}
This is my main class Client_autoAnno.java 这是我的主类Client_autoAnno.java
package testMain;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import beans.Car_AutoAnno;
public class Client_autoAnno {
public static void main(String[] args) {
ApplicationContext app = new ClassPathXmlApplicationContext("resource/spring_autowireAnno.xml");
Car_AutoAnno car = (Car_AutoAnno) app.getBean("c");
car.printCar();
}
}
This is my XML file: 这是我的XML文件:
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<!-- activate autowire annotation -->
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<bean id="c" class="beans.Car_AutoAnno"/>
<bean id="e" class="beans.Engine_AutoAnno">
<property name="model" value="XF"/>
</bean>
<bean id="e1" class="beans.Engine_AutoAnno">
<property name="model" value="XJ"/>
</bean>
</beans>
This is the exception i am getting: 这是我得到的例外:
Exception in thread "main" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'c': Unsatisfied dependency expressed through field 'engine';
线程“主”中的异常org.springframework.beans.factory.UnsatisfiedDependencyException:创建名称为“ c”的bean时出错:通过字段“ engine”表示的不满足的依赖关系; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'beans.Engine_AutoAnno' available: expected single matching bean but found 2: e,e1
嵌套的异常是org.springframework.beans.factory.NoUniqueBeanDefinitionException:没有类型为'beans.Engine_AutoAnno'的合格bean:期望的单个匹配bean,但找到2:e,e1
How to solve this? 如何解决呢?
Thanks in avdance. 在此感谢您。
Add <context:annotation-config />
in your xml @Qualifier annotations need this. 在XML @Qualifier注释中添加
<context:annotation-config />
需要此功能。
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
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/util http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:annotation-config />
// your bean definations here.
The answer given by Mr. Raghvendra Garg 拉格文德拉·加尔格先生的回答
worked fine... 工作正常...
This is the updated XML file.. 这是更新的XML文件。
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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">
<!-- activate autowire annotation -->
<context:annotation-config />
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<bean id="c" class="beans.Car_AutoAnno"/>
<bean id="e" class="beans.Engine_AutoAnno">
<property name="model" value="XF"/>
</bean>
<bean id="e1" class="beans.Engine_AutoAnno">
<property name="model" value="XJ"/>
</bean>
</beans>
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