java - 没有定义名为异常的 bean

Question

包 com.mkyong.output;IOutputGenerator.java

public interface IOutputGenerator
{
    public void generateOutput();
}

包 com.mkyong.output;输出助手.java

@Component
public class OutputHelper {

    @Autowired
    IOutputGenerator outputGenerator;

    public void generateOutput() {
        outputGenerator.generateOutput();
    }

    /*//DI via setter method
    public void setOutputGenerator(IOutputGenerator outputGenerator) {
        this.outputGenerator = outputGenerator;
    }*/
}

包 com.mkyong.output.impl;

CsvOutputGenerator.java

@Component
public class CsvOutputGenerator implements IOutputGenerator {
    public void generateOutput() {
        System.out.println("This is Csv Output Generator");
    }
}

SpringBeans.xml

<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-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

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

</beans>

我在线程 "main"org.springframework.beans.factory.NoSuchBeanDefinitionException 中得到这个异常异常:没有定义名为 'OutputHelper' 的 bean

即使我已将 OutputHelper 标记为组件。

Answer 1

我变了

OutputHelper output = (OutputHelper) context.getBean("OutputHelper");

到

OutputHelper output = (OutputHelper) context.getBean("outputHelper");

它奏效了。