springboot Autowired BeanNotOfRequiredTypeException

v现象

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一个实现类，而不是接口

@Autowired
private XxxServiceImpl xxxService;

v解决方案

1. Autowired接口

2. 使用EnableAspectJAutoProxy

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SpringBootApplication
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class Application {
    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(Application.class);
        app.run(args);
    }
}
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设置proxy-target-class为true即使用cglib的方式代理对象，默认是jdk方式代理。

jdk的动态代理不支持类注入，只支持接口方式注入。

 

v动态代理类型判断

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//org.springframework.aop.framework.DefaultAopProxyFactory     
  
//参数AdvisedSupport 是Spring AOP配置相关类     
  
public AopProxy createAopProxy(AdvisedSupport advisedSupport)     
  
        throws AopConfigException {     
  
    //在此判断使用JDK动态代理还是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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本文转自 小眼儿 博客园博客，原文链接：http://www.cnblogs.com/hujunzheng/p/8428422.html，如需转载请自行联系原作者