spring aop可通过参数proxyTargetProxy控制创建代理的方式
proxyTargetProxy=true：强制使用cglib代理
proxyTargetProxy=false：目标实现类实现了接口使用jdk，没有实现接口则使用cglib
springboot 默认代理行为
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# 通过参数spring.aop.proxy-target-proxy控制 1.x：proxy-target-proxy=false 2.x：proxy-target-proxy=true |
默认代理行为
HelloService
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public interface HelloService { String hello(); } |
HelloServiceImpl
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@Service public class HelloServiceImpl implements HelloService { @Override public String hello() { return "hello" ; } } |
HelloService2Impl
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@Service public class HelloService2Impl { public String hello(){ return "hello2" ; } } |
CustomAspect
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@Aspect @Component public class CustomAspect {
@Pointcut ( "execution(* *.hello(..))" ) public void fun(){ } @Before ( "fun()" ) public void before(JoinPoint joinPoint){ System.out.print( "before ==> " ); MethodSignature signature = (MethodSignature) joinPoint.getSignature(); Method method = signature.getMethod(); System.out.println(method.getDeclaringClass().getName()+ "." +method.getName()); } |
HelloController
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@RestController public class HelloController {
@Resource private HelloService helloService; private HelloService2Impl helloService2; @RequestMapping ( "/hello" ) public String hello(){ /* System.out.println("HelloController helloService.hello()："+helloService.hello()); System.out.println("HelloController helloService2.hello()："+helloService2.hello()); */ System.out.println(helloService.getClass().getName()); System.out.println(helloService2.getClass().getName()); return "success" ; } } |
localhost:8080/hello，控制台输出：
2022-04-23 22:32:19.334 INFO 1224 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 737 ms
2022-04-23 22:32:19.638 INFO 1224 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-04-23 22:32:19.646 INFO 1224 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 1.351 seconds (JVM running for 1.774)
2022-04-23 22:32:23.915 INFO 1224 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2022-04-23 22:32:23.915 INFO 1224 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2022-04-23 22:32:23.916 INFO 1224 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
before ==> com.example.demo.controller.HelloController.hello
# 无论是否实现接口都使用cglib创建代理
com.example.demo.service.impl.HelloServiceImpl$$EnhancerBySpringCGLIB$$b6dcbbe7
com.example.demo.service.impl.HelloService2Impl$$EnhancerBySpringCGLIB$$589ac389
修改代理行为
application.properties
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spring.aop.proxy-target- class = false |
localhost:8080/hello，控制台输出：
2022-04-23 22:40:14.300 INFO 1237 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 935 ms
2022-04-23 22:40:14.639 INFO 1237 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-04-23 22:40:14.647 INFO 1237 --- [ main] com.example.demo.DemoApplication : Started DemoApplication in 1.594 seconds (JVM running for 2.17)
2022-04-23 22:40:17.156 INFO 1237 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2022-04-23 22:40:17.156 INFO 1237 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2022-04-23 22:40:17.157 INFO 1237 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
before ==> com.example.demo.controller.HelloController.hello
# helloServiceImpl使用jdk创建代理对象
com.sun.proxy.$Proxy56
# helloService2Impl使用cglib创建代理对象
com.example.demo.service.impl.HelloService2Impl$$EnhancerBySpringCGLIB$$f6915580
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原文链接：https://blog.csdn.net/weixin_43931625/article/details/124370609
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