zbb20180824 spring ioc aop 例子

最新推荐文章于 2025-09-12 18:08:49 发布

转载最新推荐文章于 2025-09-12 18:08:49 发布 · 129 阅读

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原文链接：http://www.cnblogs.com/super-admin/p/9530054.html

文章标签：

#java #测试 #web.xml

本文详细介绍了一个基于Spring MVC框架的项目配置与实现过程，包括pom.xml依赖管理，web.xml部署描述符，以及spring-mvc.xml和applicationContext.xml配置文件的设置。深入探讨了如何利用AOP（面向切面编程）进行日志记录，通过具体示例展示了切面、连接点、通知等AOP核心概念的应用。

zbb_ioc_aop

https://pan.baidu.com/disk/home#/all?vmode=list&path=%2Fcode%2Fspring

pom.xml

<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>com.zbb</groupId>
	<artifactId>zbb_test01</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>zbb_test01 Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<!-- https://mvnrepository.com/artifact/junit/junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>

		<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>4.0.1</version>
			<scope>provided</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>5.0.8.RELEASE</version>
		</dependency>
		<!-- aop aspect注解导包 -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjrt</artifactId>
			<version>1.8.6</version>
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.8.9</version>
		</dependency>

	</dependencies>
	<build>
		<finalName>zbb_test01</finalName>
	</build>
</project>

　　web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>springMVC</display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<!-- spring 配置 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			classpath:applicationContext.xml
		</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- spring-mvc 配置 -->
	<servlet>
		<servlet-name>spring-mvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring-mvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>


	<servlet-mapping>
		<servlet-name>spring-mvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>

</web-app>

applicationContext.xml

<?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"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<!-- Activates annotation-based bean configuration -->
<context:annotation-config />

<!-- Scans for application @Components to deploy -->
<context:component-scan base-package="com.zbb" />

</beans>

spring-mvc.xml

<?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"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">

 

 

<!-- 扫描控制器类 -->
<context:component-scan base-package="com.zbb" />
<!-- 启动AspectJ支持 只对扫描过的bean有效 -->
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

<!--开启注解 -->
<mvc:annotation-driven />

<!-- jsp视图解析器 -->
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>


</beans>

LoggerAspect.java

package com.zbb.aspect;

import java.util.Arrays;
import java.util.List;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Aspect // 该标签把LoggerAspect类声明为一个切面
@Order(1) // 设置切面的优先级：如果有多个切面，可通过设置优先级控制切面的执行顺序（数值越小，优先级越高）
@Component // 该标签把LoggerAspect类放到IOC容器中
public class LoggerAspect {

	/**
	 * 定义一个方法，用于声明切入点表达式，方法中一般不需要添加其他代码 使用@Pointcut声明切入点表达式
	 * 后面的通知直接使用方法名来引用当前的切点表达式；如果是其他类使用，加上包名即可
	 */
	@Pointcut("execution(public * com.zbb.controller.*.*(..))")
	public void declearJoinPointExpression() {
	}
	@Pointcut("execution(public * com.zbb.service.*.*(..))")
	public void declearJoinPointExpression2() {
	}

	/**
	 * 前置通知
	 * 
	 * @param joinPoint
	 */
	@Before("declearJoinPointExpression()") // 该标签声明次方法是一个前置通知：在目标方法开始之前执行
	public void beforMethod(JoinPoint joinPoint) {
		String methodName = joinPoint.getSignature().getName();
		List<Object> args = Arrays.asList(joinPoint.getArgs());
		System.out.println("this method " + methodName + " begin. param<" + args + ">");
	}

	/**
	 * 后置通知（无论方法是否发生异常都会执行,所以访问不到方法的返回值）
	 * 
	 * @param joinPoint
	 */
	@After("declearJoinPointExpression()")
	public void afterMethod(JoinPoint joinPoint) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.");
	}

	/**
	 * 返回通知（在方法正常结束执行的代码） 返回通知可以访问到方法的返回值！
	 * 
	 * @param joinPoit
	 */
	@AfterReturning(value = "declearJoinPointExpression()", returning = "result")
	public void afterReturnMethod(JoinPoint joinPoint, Object result) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.result<" + result + ">");
	}

	/**
	 * 异常通知（方法发生异常执行的代码） 可以访问到异常对象；且可以指定在出现特定异常时执行的代码
	 * 
	 * @param joinPoint
	 * @param ex
	 */
	@AfterThrowing(value = "declearJoinPointExpression()", throwing = "ex")
	public void afterThrowingMethod(JoinPoint joinPoint, Exception ex) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.ex message<" + ex + ">");
	}

	/**
	 * 环绕通知(需要携带类型为ProceedingJoinPoint类型的参数)
	 * 环绕通知包含前置、后置、返回、异常通知；ProceedingJoinPoin 类型的参数可以决定是否执行目标方法
	 * 且环绕通知必须有返回值，返回值即目标方法的返回值
	 * 
	 * @param joinPoint
	 */
	@Around(value = "declearJoinPointExpression()")
	public Object aroundMethod(ProceedingJoinPoint point) {

		Object result = null;
		String methodName = point.getSignature().getName();
		try {
			// 前置通知
			System.out.println("The method " + methodName + " start. param<" + Arrays.asList(point.getArgs()) + ">");
			// 执行目标方法
			result = point.proceed();
			// 返回通知
			System.out.println("The method " + methodName + " end. result<" + result + ">");
		} catch (Throwable e) {
			// 异常通知
			System.out.println("this method " + methodName + " end.ex message<" + e + ">");
			throw new RuntimeException(e);
		}
		// 后置通知
		System.out.println("The method " + methodName + " end.");
		return result;
	}
	
	
	/**
	 * 前置通知
	 * 
	 * @param joinPoint
	 */
	@Before("declearJoinPointExpression2()") // 该标签声明次方法是一个前置通知：在目标方法开始之前执行
	public void beforMethod2(JoinPoint joinPoint) {
		String methodName = joinPoint.getSignature().getName();
		List<Object> args = Arrays.asList(joinPoint.getArgs());
		System.out.println("this method " + methodName + " begin. param<" + args + ">");
	}

	/**
	 * 后置通知（无论方法是否发生异常都会执行,所以访问不到方法的返回值）
	 * 
	 * @param joinPoint
	 */
	@After("declearJoinPointExpression2()")
	public void afterMethod2(JoinPoint joinPoint) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.");
	}

	/**
	 * 返回通知（在方法正常结束执行的代码） 返回通知可以访问到方法的返回值！
	 * 
	 * @param joinPoit
	 */
	@AfterReturning(value = "declearJoinPointExpression2()", returning = "result")
	public void afterReturnMethod2(JoinPoint joinPoint, Object result) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.result<" + result + ">");
	}

	/**
	 * 异常通知（方法发生异常执行的代码） 可以访问到异常对象；且可以指定在出现特定异常时执行的代码
	 * 
	 * @param joinPoint
	 * @param ex
	 */
	@AfterThrowing(value = "declearJoinPointExpression2()", throwing = "ex")
	public void afterThrowingMethod2(JoinPoint joinPoint, Exception ex) {
		String methodName = joinPoint.getSignature().getName();
		System.out.println("this method " + methodName + " end.ex message<" + ex + ">");
	}

	/**
	 * 环绕通知(需要携带类型为ProceedingJoinPoint类型的参数)
	 * 环绕通知包含前置、后置、返回、异常通知；ProceedingJoinPoin 类型的参数可以决定是否执行目标方法
	 * 且环绕通知必须有返回值，返回值即目标方法的返回值
	 * 
	 * @param joinPoint
	 */
	@Around(value = "declearJoinPointExpression2()")
	public Object aroundMethod2(ProceedingJoinPoint point) {

		Object result = null;
		String methodName = point.getSignature().getName();
		try {
			// 前置通知
			System.out.println("The method " + methodName + " start. param<" + Arrays.asList(point.getArgs()) + ">");
			// 执行目标方法
			result = point.proceed();
			// 返回通知
			System.out.println("The method " + methodName + " end. result<" + result + ">");
		} catch (Throwable e) {
			// 异常通知
			System.out.println("this method " + methodName + " end.ex message<" + e + ">");
			throw new RuntimeException(e);
		}
		// 后置通知
		System.out.println("The method " + methodName + " end.");
		return result;
	}
}

　　TestController.java

package com.zbb.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.zbb.service.TestService;

@RestController
@RequestMapping("test")
public class TestController {
	@Autowired
	TestService testService;
	@RequestMapping("t1")
	public void t1(){
		testService.t2();
	}
}

　　TestService.java

package com.zbb.service;

import org.springframework.stereotype.Service;

@Service
public class TestService {
public void t2(){
	System.out.println("asdfafasdf");
}
}

转载于:https://www.cnblogs.com/super-admin/p/9530054.html