SpringBoot自定义注解的步骤

最新推荐文章于 2025-02-11 09:36:23 发布

原创最新推荐文章于 2025-02-11 09:36:23 发布 · 219 阅读

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文章标签：

#spring boot #java #spring

自定义注解步骤

1. 自定义注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface MyCustomAnnotation {
String name();
// 可以在这里定义注解的属性
}

2. 自定义切面

@Aspect
@Component
public class MyCustomAnnotationAspect {

    @Before("@within(myCustomAnnotation) || @annotation(myCustomAnnotation)")
    public void beforeMethodWithCustomAnnotation(MyCustomAnnotation myCustomAnnotation) {
        String name = myCustomAnnotation.name();
        System.out.println("name = " + name);
        // 在带有自定义注解的类或方法执行前执行的逻辑
        System.out.println("Before method with custom annotation");
    }
}

3. 在类或方法上添加自定义注解

@Controller
public class MyController {

    @GetMapping("/annotation")
    @MyCustomAnnotation(name = "zgd")
    @ResponseBody
    public String myMethod() {
        System.out.println("执行了myMethod方法");
        // 方法逻辑
        return "example";
    }
}

配置文件pom.xml的依赖

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>