spring前置后置通知实现

前言

Pointcut注解表达式execution、@target、@annotation、@within等：
　　https://blog.csdn.net/HD243608836/article/details/100174658

Spring中@within与@target的一些区别：
　　https://blog.csdn.net/qq_46388795/article/details/120265883
aop结构：
　　https://zhuanlan.zhihu.com/p/244864171 
其他参考信息：
　　https://www.jianshu.com/p/85a1ea6c7bdc

一下代码下载地址：
　　https://files-cdn.cnblogs.com/files/blogs/679445/hdxspringinit.zip

 

1、样例：类EventIntercept 

package com.hdx.common.hdxspringinit.aop;


import com.hdx.common.hdxspringinit.annotation.MethodAnnotation;
import com.hdx.common.hdxspringinit.annotation.MyAnnotation;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import java.lang.reflect.Method;

// 触发优先级
@Order(-1)

// 通过配置控制当前类是否生效 name=属性文件中配置的key  havingValue=属性文件中配置的值相等生效  matchIfMissing=true如果没有配置默认生效
@ConditionalOnProperty(name = "spring.datasource.type",
        havingValue = "org.apache.tomcat.jdbc.pool.DataSource",
        matchIfMissing = true)
@Aspect
@Component
public class EventIntercept {

    // https://www.jianshu.com/p/85a1ea6c7bdc

    // https://zhuanlan.zhihu.com/p/244864171  aop结构

    // Spring中@within与@target的一些区别
    // https://blog.csdn.net/qq_46388795/article/details/120265883

    // Pointcut注解表达式execution、@target、@annotation、@within等
    // https://blog.csdn.net/HD243608836/article/details/100174658

    /**
     *
     * 拦截条件
     * 1、类上含有 MyAnnotation注解
     * 2、当前方法上有MethodAnnotation 注解
     *
     * @param joinPoint
     * @param myAnnotation
     * @param methodAnnotation
     * @throws Exception
     */
    //@execution(com.hdx.common.hdxspringinit.evnettest..*)
    // && execution(* com.hdx.common.hdxspringinit.evnettest.*.*(..))
    // && @within(com.hdx.common.hdxspringinit.annotation.MyAnnotation)
    // && @annotation(com.hdx.common.hdxspringinit.annotation.MethodAnnotation)
    @Before("@within(myAnnotation) && @annotation(methodAnnotation)")
    public void afterPropertiesSet2(JoinPoint joinPoint, MyAnnotation myAnnotation, MethodAnnotation methodAnnotation) throws Exception {

        //获取当前拦截的原始类对象
        joinPoint.getTarget();
        //获取当前拦截的原始类对象上面的注解
        joinPoint.getTarget().getClass().getAnnotation(MyAnnotation.class);


        // 获取当前拦截的方法对象
        Method targetMethod =((MethodSignature)joinPoint.getSignature()).getMethod();
        // 根据反射获取被代理原始的方法对象参数
        Method realMethod = joinPoint.getTarget().getClass().getDeclaredMethod(joinPoint.getSignature().getName(), targetMethod.getParameterTypes());


        // 获取当前方法的入参值
        Object[] vals = joinPoint.getArgs();
        // 获取当前拦截方法的变量名称
        ((MethodSignature) joinPoint.getSignature()).getParameterNames();

        System.out.printf("");
    }

    @After("execution(* com.hdx.common.hdxspringinit.evnettest.*.*(..))")
    public void afterPropertiesSet2() throws Exception {
        System.out.printf("");
    }
}

2、自定义注解：MethodAnnotation 、MyAnnotation

MyAnnotation

package com.hdx.common.hdxspringinit.annotation;

import java.lang.annotation.*;

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface MyAnnotation {
    String name();
}
MethodAnnotation
package com.hdx.common.hdxspringinit.annotation;

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

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MethodAnnotation {
    String name();
}

3、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hdx.common</groupId>
    <artifactId>hdxspringinit</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>hdxspringinit</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <repackage.classifier/>
        <spring-native.version>0.12.0-SNAPSHOT</spring-native.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
            <version>2.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                    <classifier>${repackage.classifier}</classifier>
                    <image>
                        <builder>paketobuildpacks/builder:tiny</builder>
                        <env>
                            <BP_NATIVE_IMAGE>true</BP_NATIVE_IMAGE>
                        </env>
                    </image>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.experimental</groupId>
                <artifactId>spring-aot-maven-plugin</artifactId>
                <version>${spring-native.version}</version>
                <executions>
                    <execution>
                        <id>test-generate</id>
                        <goals>
                            <goal>test-generate</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>generate</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <releases>
                <enabled>false</enabled>
            </releases>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
        </pluginRepository>
    </pluginRepositories>

    <profiles>
        <profile>
            <id>native</id>
            <properties>
                <repackage.classifier>exec</repackage.classifier>
                <native-buildtools.version>0.9.11</native-buildtools.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.junit.platform</groupId>
                    <artifactId>junit-platform-launcher</artifactId>
                    <scope>test</scope>
                </dependency>
            </dependencies>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.graalvm.buildtools</groupId>
                        <artifactId>native-maven-plugin</artifactId>
                        <version>${native-buildtools.version}</version>
                        <extensions>true</extensions>
                        <executions>
                            <execution>
                                <id>test-native</id>
                                <phase>test</phase>
                                <goals>
                                    <goal>test</goal>
                                </goals>
                            </execution>
                            <execution>
                                <id>build-native</id>
                                <phase>package</phase>
                                <goals>
                                    <goal>build</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

</project>

 

posted @ 2022-06-03 19:07  银河系的极光  阅读(219)  评论(0)    收藏  举报