@autowired注释问题，不在课堂上注入 bean，使用 Spring3.0，休眠

Question

以下是我的类：

package com.abc.trade.util;
public class StockTraderLogger {
    static Logger logger = Logger.getLogger("StockTraderLogger");
    @Autowired
    ConfigService configService; 


    public static void debug(Object className, Object logMessage) {     
        try {
            System.out.println("in debug.. ");
            StockTraderLogger stl =new StockTraderLogger();
            stl.addMessage(""+convertToString(className)+"t"+convertToString(logMessage));
            System.out.println("in debug..post ");
        } catch (DataAccessException e) {
            System.out.println("Caught exception...");
                e.printStackTrace();
        }
    }
    public void addMessage(String message) throws DataAccessException {
        System.out.println("in  add message of util. ");
        System.out.println("String: " + configService); 
        configService.addMessage(message);          
    }
}

@Autowire注释不起作用。当调用addMessage方法时，它将configService的值显示为 null。但是它已正确注入到我的某些控制器类中，但此处未正确注入。

谁能解释一下问题是什么？以及如何解决这个问题？

XML 的代码是：（beandefinition.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:aop="http://www.springframework.org/schema/aop"
           xmlns:tx="http://www.springframework.org/schema/tx"
           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/tx
           http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
           http://www.springframework.org/schema/aop

   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-2.5.xsd">
    <context:component-scan base-package="com.abc.trade.util"/> 
      <context:component-scan base-package="com.abc.trade.service"/>
       <!-- Hibernate Configuration -->
       <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">    
                <property name="annotatedClasses">      
                    <list>
          <value>com.abc.trade.model.Order</value>  
          <value>com.abc.trade.model.Profile</value> 
          <value>com.abc.trade.model.Log</value>                
                    </list>    
                </property>  
           </bean>
            <tx:annotation-driven/> 
           <bean id="transactionManager" 
               class="org.springframework.orm.hibernate3.HibernateTransactionManager">
                <property name="sessionFactory" ref="sessionFactory"/>
          </bean>
           <bean id="commonService" class="com.abc.trade.framework.service.CommonServiceImplementor">
                <property name="commonDao" ref="commonDao"/>
           </bean>
           <bean id="commonDao" class="com.abc.trade.framework.dao.HibernateDAO">
            <property name="sessionFactory"><ref local="sessionFactory"/></property>
           </bean>
            <bean id="configService" class="com.abc.trade.service.ConfigServiceImplementor" parent="commonService">
           </bean>
           <import resource="../context/springws-servlet.xml"/>
     </beans>

另一个XML是：（Springmvc-servlet.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:webflow="http://www.springframework.org/schema/webflow-config"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/webflow-config
        http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd">
   <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> 
        <property name="prefix" value="/jsp/"/>
         <property name="suffix" value=".jsp"/>
    </bean>

     <context:component-scan base-package="com.abc.trade.controller" />   
     <context:component-scan base-package="com.abc.trade.util"/>

     <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="messages" />
    </bean>
     <!-- Exception Resolver -->
     <bean id="exceptionResolver"
    class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="com.abc.trade.framework.exception.DataAccessException">
                errorPage</prop>
                <prop key="java.sql.SQLException">errorPage</prop>
                <prop key="java.lang.Exception">errorPage</prop> 
            </props>
        </property>
    </bean>   
</beans>

提前谢谢你。

ConfigService ：

package com.abc.trade.service;
import org.springframework.stereotype.Service;
import com.abc.trade.framework.exception.DataAccessException;
public interface ConfigService {
        public void addMessage(String message) throws DataAccessException;
}

配置服务实现器：

package com.abc.trade.service;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.abc.trade.framework.exception.DataAccessException;
import com.abc.trade.framework.service.CommonServiceImplementor;
import com.abc.trade.model.Log;
import com.abc.trade.model.Mode;
import com.abc.trade.util.StockTraderLogger;
@Service("configService")
public class ConfigServiceImplementor extends CommonServiceImplementor implements ConfigService{
    String errorMessage = "";
    @Override
    public void addMessage(String message) {
        System.out.println("in add message of service...........");
        Log log = new Log();
        try{
            log.setMessage(message);
            System.out.println("Message is: "+message);
            int i=save(log);
        }catch(Exception e)
        {
            errorMessage = "Error in saving debug message";
            e.printStackTrace();
            //throw new DataAccessException(errorMessage);
        }
    }
}

Answer 1

StockTraderLogger 没有被声明为春豆，在春豆上下文中不存在，因此注入不起作用。

<bean id="StockTraderLogger" class="com.abc.trade.util.StockTraderLogger"/>

或

@Component
public class StockTraderLogger { /**/ }

Answer 2

这里的问题出在调试方法中：

    StockTraderLogger stl =new StockTraderLogger();

这不是弹簧管理的。您可以通过两种方式将 Spring 托管 bean 注入到非托管 bean 中。在这里，您可以在 StockTraderLogger 中注入 configService：

1）通过自动线能力豆厂：

    ApplicationContext ctx = new ClassPathXmlApplicationContext("beansdefinition.xml");
    StockTraderLogger stl = new StockTraderLogger();
    ctx.getAutowireCapableBeanFactory().autowireBeanProperties(stl, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);

2）通过使用Spring AOP@Configurable注释，该注释将类标记为符合Spring驱动配置的条件（例如使用"new"运算符实例化的对象）。

    @Configurable
    public class StockTraderLogger {
    ...
    }
and specifying this <context:spring-configured/> in beansdefinition.xml. 

您可以在此处找到有关此春季aop方式的更多信息。

Answer 3

将此添加到applicationContext.xml：

xmlns:mvc="http://www.springframework.org/schema/mvc"

和

http://www.springframework.org/schema/mvc到xsi:schemalocation

MVC 注释驱动是注释控制器和其他功能所必需的：

<mvc:annotation-driven />

Answer 4

我想你失踪了

<context:annotation-config />

还要确保你的配置服务类有

@Service("configService") 

注释，它将使该类成为自动布线的候选对象。

和你应该使用的原因

<context:component-scan base-package="package" />

作为配置服务包名称。