XML配置中的Java Spring Framework JavaConfig

Question

此問題已在較早的線程中提出，但我的代碼仍然無法正常工作。 please click for the earlier thread

這是在Spring框架中混合佈線的情況。 我有一個彈簧佈線，我試圖從xml調用javaconfig beans，然後通過應用程序上下文調用xml，但仍然出現錯誤。

代碼細節如下：

beanconfig.xml

<?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:c="http://www.springframework.org/schema/c" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd"> 

     <bean class="org.spring.wiring.javabasd.appcontextxml.JavaConfig"> 
     </bean>  
</beans> 

JavaConfig類

package org.spring.wiring.javabasd.appcontextxml; 
import org.springframework.context.annotation.Bean; 
    @Configuration 
    class JavaConfig { 
     @Bean 
     public Shape xyz(){ 
      return new Sphere();   
     } 

     @Bean 
     public Details abc(){  
      return new Details(xyz()); 
     } 
    } 

基於XML的應用情境呼叫

package org.spring.wiring.javabasd.appcontextxml; 
import org.springframework.context.support.ClassPathXmlApplicationContext; 

class Main { 
    public static void main(String[] args) throws Exception { 

     ClassPathXmlApplicationContext context =new ClassPathXmlApplicationContext("classpath:org/spring/wiring/javabasd/appcontextxml/beanconfig.xml"); 
     Details gg = context.getBean(Details.class); 

     gg.getVolume(); 
     context.close(); 
     } 
} 

下面是我運行它時得到的錯誤。

Feb 21, 2017 9:08:25 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh 
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@b1a58a3: startup date [Tue Feb 21 21:08:25 EST 2017]; root of context hierarchy 
Feb 21, 2017 9:08:25 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 
INFO: Loading XML bean definitions from class path resource [org/spring/wiring/javabasd/appcontextxml/beanconfig.xml] 
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.spring.wiring.javabasd.appcontextxml.Details] is defined 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:374) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:334) 
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1088) 
    at org.spring.wiring.javabasd.appcontextxml.Main.main(Main.java:9) 

看起來正在作出JavaConfig呼叫，但「詳細信息」和「形狀」沒有得到創建的Bean。 請幫助，讓我知道是否需要其他類的代碼。

Answer 1

嘗試在您的beanconfig.xml中添加<context:annotation-config/>。因爲在打開<context:annotation-config/>時，容器將識別@Configuration註釋並正確處理在AppConfig中聲明的@Bean方法。

<?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:c="http://www.springframework.org/schema/c" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd"> 

     <context:annotation-config/> 

     <bean class="org.spring.wiring.javabasd.appcontextxml.JavaConfig"> 
     </bean>  
</beans>