AOP 建议未在 Spring Boot 应用程序中运行

Question

我正在尝试在我的应用程序中使用简单的日志记录方面，但建议没有运行，并且在控制台中没有收到任何日志。

添加了依赖项-

<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>

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

实体类-

package com.ayushsingh.aopproject.entity;

import org.springframework.stereotype.Component;

@Component
public class Student {

    private Long id;

    private String name;

    private String address;

    private Integer age;

    private Long phone;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Long getPhone() {
        return phone;
    }

    public void setPhone(Long phone) {
        this.phone = phone;
    }
}

方面类-

package com.ayushsingh.aopproject.aop;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;


@Aspect
@Component
public class LoggingAspect {

     LoggingAspect() {
          System.out.println("Logging Aspect instansiated");
     }

     // -Run before a getter
     @Before("execution(public String com.ayushsingh.aopproject.entity.Student.getName())")
     public void LoggingAdvice1() {
          System.out.println("Advice 1");
     }

     // - Run before a method of a particular class
     @Before("execution(public String com.ayushsingh.aopproject.entity.Student.getName())")
     public void LoggingAdvice2() {
          System.out.println("Adivce 2");
     }

     // - Run before all getters
     @Before("execution(public String com.ayushsingh.aopproject.*.get*())")
     public void LoggingAdvice3() {
          System.out.println("Advice 3");
     }

     // - Run before all setters (methods with argument)
     @Before("execution(public void com.ayushsingh.aopproject.*.set*(*))") // -one or more arguments
     public void LoggingAdvice4() {
          System.out.println("Advice 4");
     }

     // -for getters of all entity classes in the entity package
     @Before("execution(public * com.ayushsingh.aopproject.entity.*.get*())")
     public void LoggingAdvice5() {
          System.out.println("Advice 5");
     }

}

主课-

package com.ayushsingh.aopproject;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

import com.ayushsingh.aopproject.entity.Student;

@SpringBootApplication
@EnableAspectJAutoProxy
public class AopProjectApplication implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(AopProjectApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        // -Create Student object
        Student student = new Student();
        student.setId(1L);
        student.setAddress("Address 1");
        student.setAge(25);
        student.setName("Ayush");
        student.setPhone(8145000047L);
        String name=student.getName();
        System.out.println("Name: " + student.getName());
    }

}

现在在运行应用程序时，我还必须从建议中获取日志，但由于我还使用调试器和断点进行了检查，因此这些方面根本没有运行。 我得到的输出是-

2024-02-07T15:20:41.325+05:30  INFO 21704 --- [  restartedMain] c.a.aopproject.AopProjectApplication     : No active profile set, falling back to 1 default profile: "default"
2024-02-07T15:20:41.408+05:30  INFO 21704 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
Logging Aspect instansiated
2024-02-07T15:20:42.527+05:30  INFO 21704 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2024-02-07T15:20:42.607+05:30  INFO 21704 --- [  restartedMain] c.a.aopproject.AopProjectApplication     : Started AopProjectApplication in 1.732 seconds (process running for 2.185)
Name: Ayush

请帮我解决这个问题。

Answer 1

不要直接调用组件构造函数，让 Spring 容器通过在

getBean(..)

返回的应用程序上下文上调用

SpringApplication.run()

（当前已被您丢弃）来为您完成此操作。

还建议您在使用新技术时至少阅读最少的文档，或者可以从功能示例应用程序开始，逐步了解更多功能，始终只更改一些小部分，如果某些功能不起作用，您可以恢复这些内容。