java - 我如何正确 Autowiring 此类和 applicationContext.xml？

Question

我对使用 Spring 还很陌生。我理解 Autowiring 的概念，但对实现感到困惑。我有一个 Maven 多模块项目，我正在尝试 Autowiring 模块 A 中的管理器类，以便我可以在模块 B 中使用它。当我尝试运行 web 应用程序时，出现以下错误:

No matching bean of type [com..Manager] found for               dependency: expected at least 1 bean which qualifies as             autowire candidate for this dependency.

模块A(jar): Manager.java

public interface Manager
{...}

ManagerImpl.java

@Service(value="manager")
public class ManagerImpl implements Manager
{...}

模块 B( war ): WebController.java

@Controller
public class WebController
{

@Autowired
private Manager manager;

..}

applicationContext.xml(在模块 A 中)

<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:c="http://www.springframework.org/schema/c" xmlns:cache="http://www.springframework.org/schema/cache"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:lang="http://www.springframework.org/schema/lang" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd">

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

    <bean
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

</beans>

Answer 1

尝试添加<context:annotation-config/>到你的applicationContext.xml。 我总是将两者都包含在内，以确保对项目进行完整的扫描。此外，您正在尝试在基础包中 Autowiring 该字段以进行组件扫描吗？