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Spring AOP简单的配置（注解和xml配置）

news 来源：原创 2024/5/18 15:40:55

注解配置AOP

　　项目路径：E:\JavaWebSrc\FirstSpringAOP

　　1：接口代码　

　　　　接口为 IPerson ，接口不需要写注释

public interface IPerson {
    public void sayNmae();
    public void introduceOneSelf();
}

　　2：实体类代码

　　　　　student继承了IPerson接口　

//将student实例化。装配到spring容器中
@Component("student")
public class Student implements IPerson {

    @Value(value = "1")
    private int id;
    @Value(value = "余文辉")
    private String name;
    @Value(value = "男")
    private String sex;

    @Override
    public void sayNmae() {
        System.out.println(this.name);
    }

    @Override
    public void introduceOneSelf() {
        System.out.println(this.toString());
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                '}';
    }
}

　　3：切面类

　　　　这里使用的注解需要导入（aopaliance.jar和　　aspectjweaver.jar 两个jar包）　

//切面声明
@Aspect
//装配到spring容器中
@Component
public class LoggingAspect {
//    声明切入点  声明切入点表达式
    @Pointcut("execution(* com.yuwenhui.annotation.Student.* (..))")
    public void JoinPointExpecssion(){};
//前置通知
    @Before("JoinPointExpecssion()")
    public void beforMethod(JoinPoint joinPoint){
//        获得方法名
        String name = joinPoint.getSignature().getName();
//        获得参数列表，再将参数数组转换成List集合
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("前置通知");
        System.out.println("参数:"+args);

    }
//后置通知
    @After("JoinPointExpecssion()")
    public void afterMethod(JoinPoint joinPoint){
        String name = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("后置通知");
        System.out.println("参数:"+args);
    }
//    返回通知，在方法正常结束的时候返回，且 必须要有一个返回值
    @AfterReturning(value = "JoinPointExpecssion()",returning = "result")
    public void afterMethodRetuning(JoinPoint joinPoint,Object result){
        String name = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("返回通知"+ result);
    }
//    异常通知 ，将在方法抛出异常时触
    @AfterThrowing(value = "JoinPointExpecssion()",throwing ="e")
    public void  afterThrowing(JoinPoint joinPoint,Exception e){
        String name = joinPoint.getSignature().getName();
        System.out.println("返回通知");
        System.out.println("异常信息"+e);
    }
}

　　xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--   扫描指定包下注释  -->
    <context:component-scan base-package="com.yuwenhui.annotation"></context:component-scan>
   <!-- 声明Aspect配置 -->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

　　测试类

public class TestAop {
    @Test
    public void testAop(){
        ApplicationContext applicationContext = new  ClassPathXmlApplicationContext("applicationContext.xml");
       IPerson student= (IPerson) applicationContext.getBean("student");
       student.sayNmae();
       student.introduceOneSelf();
    }
}

XML配置AOP

　　1：接口配置

　　　　不管是XML配置还是annotation配置，接口类都不需要改变

public interface IPerson {
    public void sayNmae();
    public void introduceOneSelf();
}

　　2：实体类配置

public class Student implements IPerson {

    private int id;

    private String name;
    private String sex;

    @Override
    public void sayNmae() {
        System.out.println(this.name);
    }

    @Override
    public void introduceOneSelf() {
        System.out.println(this.toString());
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                '}';
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

　　3：切面类

public class LoggingAspect {

    public void JoinPointExpecssion(){};

    public void beforMethod(JoinPoint joinPoint){
        String name = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("前置通知");
        System.out.println("参数:"+args);

    }

    public void afterMethod(JoinPoint joinPoint){
        String name = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("后置通知");
        System.out.println("参数:"+args);
    }

    public void afterMethodRetuning(JoinPoint joinPoint,Object result){
        String name = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("返回通知"+ result);
    }

    public void  afterThrowing(JoinPoint joinPoint,Exception e){
        String name = joinPoint.getSignature().getName();
        System.out.println("返回通知");
        System.out.println("异常信息"+e);
    }
}

　　4:测试类

public class TestXml {
    @Test
    public void testAop(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext-beanxml.xml");
        IPerson student= (IPerson) applicationContext.getBean("student");
        student.sayNmae();
        student.introduceOneSelf();
    }
}

　　　5：配置文件

　　　　需要格外注意　　　

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
    <!--  需要注意xml头，不是IDEA自动生成的   -->
    <!--  配置实体类，并为相关字段初始化  -->
    <bean id="student" class="com.yuwenhui.xml.Student">
        <property name="name" value="余文辉"></property>
        <property name="id" value="1"></property>
        <property name="sex" value="男"></property>
    </bean>
    <!--  声明切面类，这里只是声明为普通的bean类  -->
    <bean id="loggingAspect" class="com.yuwenhui.xml.LoggingAspect"></bean>
    <!-- 配置aop   -->
    <aop:config>
        <!-- 配置切点表达式   -->
        <aop:pointcut id="pointcut" expression="execution(* com.yuwenhui.xml.Student.* (..))"/>
        <!-- 这里才是真正的声明切面   -->
        <aop:aspect ref="loggingAspect">
            <!--前置通知-->
            <aop:before method="beforMethod" pointcut-ref="pointcut"/>
            <!--后置通知-->
            <aop:after method="afterMethod" pointcut-ref="pointcut"/>
            <!--返回通知-->
            <aop:after-returning method="afterMethodRetuning" pointcut-ref="pointcut" returning="result"/>
            <!--异常通知-->
            <aop:after-throwing method="afterThrowing" pointcut-ref="pointcut" throwing="e"/>
        </aop:aspect>
    </aop:config>
</beans>