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but was actually of type 'com.sun.proxy.$Proxy101' 注入问题

Posted on 2018-09-21 16:43  水木山川  阅读(8274)  评论(0)  编辑  收藏  举报

最近在用springboot搭建项目框架时，遇到了如下错误，查询了一番，原来是没有引入spring框架的aop包导致：

问题：

 1 ERROR o.s.test.context.TestContextManager - Caught exception while allowing TestExecutionListener [org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@2e3252] to prepare test instance [com.zsm.sb.service.impl.StudentServiceImpTest@d978ab9]
 2 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.zsm.sb.service.impl.StudentServiceImpTest': Unsatisfied dependency expressed through field 'studentServiceImp'; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'studentServiceImpl' is expected to be of type 'com.zsm.sb.service.impl.StudentServiceImpl' but was actually of type 'com.sun.proxy.$Proxy101'
 3 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587)
 4 at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)
 5 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373)
 6 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344)
 7 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:399)
 8 at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118)
 9 at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83)
10 at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:44)
11 at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:242)
12 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
13 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
14 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
15 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
16 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
17 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
18 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
19 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
20 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
21 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
22 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
23 at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
24 at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
25 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
26 at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
27 at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
28 at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
29 at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
30 at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
31 at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:379)
32 at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:340)
33 at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
34 at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:413)
35 Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'studentServiceImpl' is expected to be of type 'com.zsm.sb.service.impl.StudentServiceImpl' but was actually of type 'com.sun.proxy.$Proxy101'
36 at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1527)
37 at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1505)
38 at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
39 at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065)
40 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584)
41 ... 31 common frames omitted

解决方案：

1.添加AOP依赖包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

2.配置参数：

 spring.aop.proxy-target-class=true 
 <aop:aspectj-autoproxy  proxy-target-class="true"/>

　　spring对AOP有两种实现方式，一种是动态代理，它是通过接口方式实现的，要求所代理的类一定是实现了某一个接口，对一般的类就无法代理，spring默认是这种；一种是通过设置proxy-target-class="true"，则是使用CGLIB实现AOP，CGLIB直接生成二进制码，使得普通类也可以实现AOP。