Java Spring-自动连接字段为空
我在Spring框架中遇到了一个问题:Java Spring-自动连接字段为空,java,spring,dependency-injection,inversion-of-control,autowired,Java,Spring,Dependency Injection,Inversion Of Control,Autowired,我在Spring框架中遇到了一个问题:@Autowired为null,但是Spring没有抛出任何异常,我不理解为什么这些字段为null 我有一门课: package com.processing.gates; public class Main { private final ApplicationContext context = Context.getContext(); @Autowired private PaymentGateFactory paymentGat
@Autowired
为null,但是Spring没有抛出任何异常,我不理解为什么这些字段为null
我有一门课:
package com.processing.gates;
public class Main {
private final ApplicationContext context = Context.getContext();
@Autowired private PaymentGateFactory paymentGateFactory;
@Autowired private CalculatorChooser calculatorChooser;
//...
}
例如,我有以下课程:
package com.processing.gates.comission;
@Component
public class CalculatorChooser {
//...
}
以下是我的Spring配置xml:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
<context:annotation-config />
<context:component-scan base-package="com.processing.gates"/>
<bean id="logPath" class="java.lang.String"> <!-- путь к папке с логами -->
<constructor-arg value="/home/yoba/NetBeansProjects/processing/gates/log/"/>
</bean>
<!-- ... -->
</beans>
它很好用。但是@Autowired不起作用。我怎样才能解决这个问题?谢谢 让Spring通过在应用程序上下文文件中声明
Main
bean或使用@Component
注释来管理bean,就像您对CalculatorChooser
<bean id="mainBean" class="com.processing.gates.Main"/>
谢谢,这很有帮助!所以春天只能在豆子里自动连接田地?是的@gth99。如果spring不知道某个类,那么它就没有理由去窥探它
<bean id="mainBean" class="com.processing.gates.Main"/>