7.spring:SpringAOP（配置文件）

SpringAOP（xml文件配置）

 配置文件的方式，主要是在xml文件中进行配置，不使用注解！

 目录：

 

AtithmeticCalculator.java

public interface AtithmeticCalculator {
    int add(int i,int j);
    int sub(int i,int j);
    int mul(int i,int j);
    int div(int i,int j);
}

AtithmeticCalculatorImp1.java

@Component
public class AtithmeticCalculatorImp1 implements AtithmeticCalculator{
    public int add(int i, int j) {
        int res = i + j;
        return res;
    }
    public int sub(int i, int j) {
        int res = i - j;
        return res;
    }
    public int mul(int i, int j) {
        int res = i * j;
        return res;
    }
    public int div(int i, int j) {
        int res = i / j;
        return res;
    }
}

LoggionAspect.java

public class LoggionAspect {
    public void beforeMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        Object [] args = joinPoint.getArgs();
        System.out.println("The method " + methodName + " begins with " + Arrays.asList(args));
    }
    public void afterMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " ends");
    }
    public void afterReturning(JoinPoint joinPoint, Object result){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " ends with " + result);
    }
    public void afterThrowing(JoinPoint joinPoint, Exception e){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " occurs excetion:" + e);
    }
}

LoggionAspect2.java

public class LoggionAspect2 {
    public void beforeMethod1(JoinPoint joinPoint){
      System.out.println("--->beforeMethod1");
      String methodName = joinPoint.getSignature().getName();
      Object [] args = joinPoint.getArgs();
      System.out.println("The method " + methodName + " begins with " + Arrays.asList(args));
      System.out.println("--->beforeMethod1");
    }
    
    public void afterMethod1(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " ends");
    }
    
    public void afterReturning1(JoinPoint joinPoint, Object result){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " ends with " + result);
    }
    public void afterThrowing1(JoinPoint joinPoint, Exception e){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " occurs excetion:" + e);
    }
    

applicationContext.xml

<!-- 配置bean -->
<bean id="atithmeticCalculator" class="com.MrChengsc.AOP.xml.AtithmeticCalculatorImp1"></bean>

<!-- 配置切面的Bean -->
<bean id="loggionAspect" class="com.MrChengsc.AOP.xml.LoggionAspect"></bean>
<bean id="loggionAspect2" class="com.MrChengsc.AOP.xml.LoggionAspect2"></bean>

<!-- 配置AOP -->
<aop:config>
    <!-- 配置切点 表达式-->
    <aop:pointcut expression="execution(* com.MrChengsc.AOP.xml.AtithmeticCalculator.*(int, int))" id="pointcut"/>
    
    <!-- 配置切面及通知 -->
    <aop:aspect  ref="loggionAspect2" order="2">
        <aop:before method="beforeMethod1" pointcut-ref="pointcut"/>
    </aop:aspect>
    <aop:aspect  ref="loggionAspect" order="1">
        <aop:before method="beforeMethod" pointcut-ref="pointcut"/>
    </aop:aspect>
</aop:config>

main

    public static void main(String[] args) {
//        AtithmeticCalculator atithmeticCalculator = null;
//        atithmeticCalculator = new AtithmeticCalculatorImp();
//        
//        atithmeticCalculator.add(1, 3);
//        System.out.println("---");
//        atithmeticCalculator.sub(3, 1);
//        System.out.println("---");
//        atithmeticCalculator.mul(1, 3);
//        System.out.println("---");
//        atithmeticCalculator.div(10, 2);
//        System.out.println("---");
        
        
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        //强制的类型使用接口的类型
        AtithmeticCalculator atithmeticCalculator = (AtithmeticCalculator) ctx.getBean(AtithmeticCalculator.class);
        
        int res = atithmeticCalculator.add(3, 6);
        System.out.println("res:" + res);
        System.out.println("-----");
//        int res1 = atithmeticCalculator.mul(2, 3);
//        System.out.println("res1:" + res1);
        
        //异常代码的测试
//        int res2 = atithmeticCalculator.div(10, 0);
//        System.out.println("res2:" + res2);
    }

The method add begins with [3, 6]
--->beforeMethod1
The method add begins with [3, 6]
--->beforeMethod1
res:9
-----

注：

1.配置bean，实现aop的类

2.配置切面的bean

3.配置aop需要使用<aop:config>标签

4.使用<aop:pointcut expression="execution(* com.MrChengsc.AOP.xml.AtithmeticCalculator.*(int, int))" id="pointcut"/>

　　配置切点表达式

　　*：代表任意的

　　两个int：可以使用   ..  进行替换

5.配置切面以及通知使用<aop:aspect>

　　ref：引用已配置的切面类bean

　　order：切面的优先级（数值越小优先级越大）

6.标签：

<aop:before method="beforeMethod" pointcut-ref="pointcut"/> ：前置通知
<aop:after method=""/>：后置通知
<aop:after-returning method="" returning="" pointcut="">：执行成功拿返回值
<aop:around method=""/>：环绕通知
<aop:after-throwing method="" >：异常通知

属性：

 pointcut-ref：引用切点表达式

 method：切面类中的方法

returning：接受返回值

pointcut：切点表达式