spring之AOP

<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 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>T226_huang</groupId>
  <artifactId>T226_spring2_aop</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>T226_spring2_aop Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.44</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.10.RELEASE</version>
        </dependency>
  </dependencies>
  <build>
    <finalName>T226_spring2_aop</finalName>
      <plugins>
    <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
    
    </plugins>
  </build>
</project>

package com.huang.aop.biz;

public interface IBookBiz {
    // 购书
    public boolean buy(String userName, String bookName, Double price);

    // 发表书评
    public void comment(String userName, String comments);
}

package com.huang.aop.biz.impl;

import com.huang.aop.biz.IBookBiz;
import com.huang.aop.ex.PriceException;

public class BookBizImpl implements IBookBiz {

    public BookBizImpl() {
        super(); 
    }

    public boolean buy(String userName, String bookName, Double price) {
        // 通过控制台的输出方式模拟购书
        if (null == price || price <= 0) {
            throw new PriceException("book price exception");
        }
        System.out.println(userName + " buy " + bookName + ", spend " + price);
        return true;
    }

    public void comment(String userName, String comments) {
        // 通过控制台的输出方式模拟发表书评
        System.out.println(userName + " say:" + comments);
    }

}

package com.huang.aop.ex;

public class PriceException extends RuntimeException {

    public PriceException() {
        super();
    }

    public PriceException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }

    public PriceException(String message, Throwable cause) {
        super(message, cause);
    }

    public PriceException(String message) {
        super(message);
    }

    public PriceException(Throwable cause) {
        super(cause);
    }
    
}

package com.huang.aop.advice;

import java.lang.reflect.Method;
import java.util.Arrays;

import org.springframework.aop.MethodBeforeAdvice;

/**
 * 买书、评论前加系统日志
 * @author Admin
 *
 */
public class MyMethodBeforeAdvice implements MethodBeforeAdvice {

    @Override
    public void before(Method method, Object[] args, Object target) throws Throwable {
        String clzName=target.getClass().getName();
        String methodName=method.getName();
        String params=Arrays.toString(args);
        System.out.println("[买书、评论前加系统日志]："+clzName+"."+methodName+"("+params+")");
    }

}

package com.huang.aop.advice;

import java.lang.reflect.Method;
import java.util.Arrays;

import org.springframework.aop.AfterReturningAdvice;

/**
 * 买书返利（存在bug）
 * @author Admin
 *
 */
public class MyAfterReturningAdvice implements AfterReturningAdvice {

    @Override
    public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
        String clzName=target.getClass().getName();
        String methodName=method.getName();
        String params=Arrays.toString(args);
        System.out.println("[买书返利的后置通知]："+clzName+"."+methodName+"("+params+")"+"\t 目标对象方法调用后的返回值"+returnValue);
    
    }

}

package com.huang.aop.advice;

import java.util.Arrays;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

public class MyMethodInterceptor implements MethodInterceptor {

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        String clzName=invocation.getThis().getClass().getName();
        String methodName=invocation.getMethod().getName();
        String params=Arrays.toString(invocation.getArguments());
        System.out.println("【环绕通知】："+clzName+"."+methodName+"("+params+")");
        Object returnValue=invocation.proceed();
        System.out.println("【环绕通知】\t目标对象方法调用后的返回值"+returnValue);
        return returnValue;
    }

}