Java aop面向切面编程(aspectJweaver)案例详解

时间:2022-01-08 08:54:56

面向切面编程的目的就是:在不改变别人的代码的前提下,在别人代码方法执行前或后,执行(切入自己的逻辑)
准备:idea+maven+aspectjweaver-1.8.9.jar
结构图:

Java aop面向切面编程(aspectJweaver)案例详解

pom.xml内容

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<dependencies>
       <dependency>
               <groupId>org.aspectj</groupId>
               <artifactId>aspectjrt</artifactId>
               <version>1.8.9</version>
       </dependency>
       <dependency>
           <groupId>org.aspectj</groupId>
           <artifactId>aspectjtools</artifactId>
           <version>1.8.9</version>
       </dependency>
       <dependency>
           <groupId>org.aspectj</groupId>
           <artifactId>aspectjweaver</artifactId>
           <version>1.8.9</version>
       </dependency>
   </dependencies>
   <build>
       <plugins>
           <plugin>
               <groupId>org.codehaus.mojo</groupId>
               <artifactId>aspectj-maven-plugin</artifactId>
               <executions>
                   <execution>
                       <goals>
                           <goal>compile</goal>
                       </goals>
                   </execution>
               </executions>
               <configuration>
                   <complianceLevel>1.8</complianceLevel>
                   <source>1.8</source>
                   <target>1.8</target>
                   <aspectDirectory>src/main/java</aspectDirectory>
               </configuration>
           </plugin>
       </plugins>
   </build>

切面类

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  public aspect Staspect {
 
    public pointcut kkMethod(): execution(public String aop.Test.kk());
    before(): kkMethod() {
        System.out.println("先执行我");
    }
}

主类

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public class Test {
    public String kk(){
        return "23";
    }
    public static void main(String[] args) {
        Test test=new Test();
        System.out.println(test.kk());
 
    }
}

新建一个aop.xml(在META-INFO文件夹下)

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<?xml version="1.0" encoding="UTF-8" ?>
<aspectj>
    <aspects>
        <aspect name="aop.Staspect"/>
    </aspects>
    <weaver options="-XaddSerialVersionUID"></weaver>
</aspectj>

打jar包,执行命令:mvn clean package
注意我的结构图,classes下面如果有两个类就是编译成功了
挑出jar包,执行命令:
java -javaagent:/home/admin/aspectjweaver-1.8.9.jar -classpath aspecttest-1.0-SNAPSHOT.jar aop.Test

注意:-javaagent后面的参数是你电脑aspectjweaver-1.8.9.jar的路径

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原文链接:https://blog.csdn.net/weixin_35555139/article/details/78529191