springboot Autowired BeanNotOfRequiredTypeException

現象

org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'xxxxImpl' is expected to be of type 'com.xxx.xxxImpl' but was actually of type 'com.sun.proxy.$Proxy62'

直接Autowired一個實現類，而不是接口

@Autowired
private XxxServiceImpl xxxService;

解決方案

　　1.　　Autowired接口

　　2.　　使用EnableAspectJAutoProxy

SpringBootApplication
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class Application {public static void main(String[] args) {SpringApplication app = new SpringApplication(Application.class);app.run(args);}
}

　　設置proxy-target-class為true即使用cglib的方式代理對象，默認是jdk方式代理。

　　jdk的動態代理不支持類注入，只支持接口方式注入。

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動態代理類型判斷

//org.springframework.aop.framework.DefaultAopProxyFactory     //參數AdvisedSupport 是Spring AOP配置相關類     public AopProxy createAopProxy(AdvisedSupport advisedSupport)     throws AopConfigException {     //在此判斷使用JDK動態代理還是CGLIB代理     if (advisedSupport.isOptimize() || advisedSupport.isProxyTargetClass()     || hasNoUserSuppliedProxyInterfaces(advisedSupport)) {     if (!cglibAvailable) {     throw new AopConfigException(     "Cannot proxy target class because CGLIB2 is not available. "    + "Add CGLIB to the class path or specify proxy interfaces.");     }     return CglibProxyFactory.createCglibProxy(advisedSupport);     } else {     return new JdkDynamicAopProxy(advisedSupport);     }     }  

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