强制 Spring Boot 2 使用 JDK 代理失败

Forcing Spring Boot 2 to use JDK Proxy failed

spring.aop.proxy-target-class=falseapplication.properties 文件无法帮助我强制 Spring Boot2 使用 JDK 代理。

看点

private Logger logger = LoggerFactory.getLogger(this.getClass());    
private final String POINT_CUT = "execution(* weatherReport.entity.*.*(..)))";
@Pointcut(POINT_CUT)
private void pointcut() {}
@Before(value="pointcut()")
public void before(JoinPoint pjp) {
    logger.info(" Check for user access ");
    logger.info(" Allowed execution for {}", pjp);
}

目标组件:

@Component
public class Hello {
    public String name = "default";
    public  String helloStr = "Guys";
    public void saySomething() {
        System.out.println(this.name+":"+this.helloStr);
    }
}

控制器:

@Autowired
private WeatherQueryService weatherservice;
@Autowired
private Hello hello;
@RequestMapping(value="/hello")
public String sayHello() {
        System.out.println(weatherservice);
        System.out.println(hello.getClass());
        hello.saySomething();
        System.out.println(hello.getClass());
        System.out.println(weatherservice.getClass());
        return "hello world";
}

result: class weatherReport.entity.Hello$$EnhancerBySpringCGLIB$$b853a6c3

application.properties

spring.aop.auto=true
spring.aop.proxy-target-class=false

好吧,我错过了一些关于 JDK Proxy 的重要理论,目标 class 应该实现接口然后我们可以使用 JDK Proxy。 在我的代码中,weatherservice 实现了一个接口,当我将 spring.aop.proxy-target-class 设置为 false 时,Spring Boot 2 使用 JDK Proxy:

class com.sun.proxy.$Proxy62

但是当我将 spring.aop.proxy-target-class 设置为 true 时,Spring Boot2 使用默认的 cglib 代理: class weatherReport.service.impl.WeatherQueryServiceImpl$$EnhancerBySpringCGLIB$$40d58c6