IoC：<bean id="" class="" >

DI：<bean> <property name="" value="" | ref="">

实例化方式：

默认构造

静态工厂：<bean id="" class="工厂类" factory-method="静态方法">

实例工厂：<bean id="工厂id" class="工厂类"> <bean id="" factory-bean="工厂id" factory-method="方法">

作用域：<bean id="" class="" scope="singleton | prototype">

生命周期：<bean id="" class="" init-method="" destroy-method="">

后处理bean BeanPostProcessor接口，<bean class="注册"> ，对容器中所有的bean都生效

属性注入

构造方法注入：<bean><constructor-arg index="" type="" >

setter方法注入：<bean><property>

p命名空间：简化<property> <bean p:属性名="普通值" p:属性名-ref="引用值"> 注意声明命名空间

SpEL：<property name="" value="#{表达式}">

#{123} #{‘abc‘}

#{beanId.propName?.methodName()}

#{T(类).静态方法|字段}

集合

数组<array>

List <list>

Set <set>

Map <map><entry key="" value="">

Properties <props><prop key="">....?

@Override

????public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {

????????if("userServiceId".equals(beanName)){

????????????System.out.println("前方法 ： " + beanName);

????????}

????????return bean;

????}

public interface UserService {

????

????public void addUser();

????public void updateUser();

????public void deleteUser();

?

}

public class MyAspect {

????

????public void before(){

????????System.out.println("鸡首");

????}

????

????public void after(){

????????System.out.println("牛后");

????}

?

}

public class MyBeanFactory {

????

????public static UserService createService(){

????????//1 目标类

????????final UserService userService = new UserServiceImpl();

????????//2切面类

????????final MyAspect myAspect = new MyAspect();

????????/* 3 代理类：将目标类（切入点）和 切面类（通知） 结合 --> 切面

???????? * ????Proxy.newProxyInstance

???????? * ????????参数1：loader ，类加载器，动态代理类 运行时创建，任何类都需要类加载器将其加载到内存。

???????? * ????????????一般情况：当前类.class.getClassLoader();

???????? * ????????????????????目标类实例.getClass().get...

???????? * ????????参数2：Class[] interfaces 代理类需要实现的所有接口

???????? * ????????????方式1：目标类实例.getClass().getInterfaces() ;注意：只能获得自己接口，不能获得父元素接口

???????? * ????????????方式2：new Class[]{UserService.class}

???????? * ????????????例如：jdbc 驱动 --> DriverManager 获得接口 Connection

???????? * ????????参数3：InvocationHandler 处理类，接口，必须进行实现类，一般采用匿名内部

???????? * ????????????提供 invoke 方法，代理类的每一个方法执行时，都将调用一次invoke

???????? * ????????????????参数31：Object proxy ：代理对象

???????? * ????????????????参数32：Method method : 代理对象当前执行的方法的描述对象（反射）

???????? * ????????????????????执行方法名：method.getName()

???????? * ????????????????????执行方法：method.invoke(对象，实际参数)

???????? * ????????????????参数33：Object[] args :方法实际参数

???????? *

???????? */

????????UserService proxService = (UserService)Proxy.newProxyInstance(

????????????????????????????????MyBeanFactory.class.getClassLoader(),

????????????????????????????????userService.getClass().getInterfaces(),

????????????????????????????????new InvocationHandler() {

????????????????????????????????????

????????????????????????????????????@Override

????????????????????????????????????public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

????????????????????????????????????????

????????????????????????????????????????//前执行

????????????????????????????????????????myAspect.before();

????????????????????????????????????????

????????????????????????????????????????//执行目标类的方法

????????????????????????????????????????Object obj = method.invoke(userService, args);

????????????????????????????????????????

????????????????????????????????????????//后执行

????????????????????????????????????????myAspect.after();

????????????????????????????????????????

????????????????????????????????????????return obj;

????????????????????????????????????}

????????????????????????????????});

????????

????????return proxService;

????}

?

}

@Test

????public void demo01(){

????????UserService userService = MyBeanFactory.createService();

????????userService.addUser();

????????userService.updateUser();

????????userService.deleteUser();

????}

public class MyBeanFactory {

????

????public static UserServiceImpl createService(){

????????//1 目标类

????????final UserServiceImpl userService = new UserServiceImpl();

????????//2切面类

????????final MyAspect myAspect = new MyAspect();

????????// 3.代理类 ，采用cglib，底层创建目标类的子类

????????//3.1 核心类

????????Enhancer enhancer = new Enhancer();

????????//3.2 确定父类

????????enhancer.setSuperclass(userService.getClass());

????????/* 3.3 设置回调函数 , MethodInterceptor接口 等效 jdk InvocationHandler接口

???????? * ????intercept() 等效 jdk invoke()

???????? * ????????参数1、参数2、参数3：以invoke一样

???????? * ????????参数4：methodProxy 方法的代理

???????? * ????????

???????? *

???????? */

????????enhancer.setCallback(new MethodInterceptor(){

?

????????????@Override

????????????public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {

????????????????

????????????????//前

????????????????myAspect.before();

????????????????

????????????????//执行目标类的方法

????????????????Object obj = method.invoke(userService, args);

????????????????// * 执行代理类的父类 ，执行目标类 （目标类和代理类 父子关系）

????????????????methodProxy.invokeSuper(proxy, args);

????????????????

????????????????//后

????????????????myAspect.after();

????????????????

????????????????return obj;

????????????}

????????});

????????//3.4 创建代理

????????UserServiceImpl proxService = (UserServiceImpl) enhancer.create();

????????

????????return proxService;

????}

?

}

• AOP联盟为通知Advice定义了org.aopalliance.aop.Advice
• Spring按照通知Advice在目标类方法的连接点位置，可以分为5类
  • 前置通知 org.springframework.aop.MethodBeforeAdvice
    • 在目标方法执行前实施增强
  • 后置通知 org.springframework.aop.AfterReturningAdvice
    • 在目标方法执行后实施增强
  • 环绕通知 org.aopalliance.intercept.MethodInterceptor
    • 在目标方法执行前后实施增强
  • 异常抛出通知 org.springframework.aop.ThrowsAdvice
    • 在方法抛出异常后实施增强
  • 引介通知 org.springframework.aop.IntroductionInterceptor
    • 在目标类中添加一些新的方法和属性

环绕通知，必须手动执行目标方法

try{

//前置通知

//执行目标方法

//后置通知

} catch(){

//抛出异常通知

}?

public interface UserService {

????

????public void addUser();

????public void updateUser();

????public void deleteUser();

?

}

/**

* 切面类中确定通知，需要实现不同接口，接口就是规范，从而就确定方法名称。

* * 采用"环绕通知" MethodInterceptor

*

*/

public class MyAspect implements MethodInterceptor {

?

????@Override

????public Object invoke(MethodInvocation mi) throws Throwable {

????????

????????System.out.println("前3");

????????

????????//手动执行目标方法

????????Object obj = mi.proceed();

????????

????????System.out.println("后3");

????????return obj;

????}

}

<!-- 1 创建目标类 -->

????<bean id="userServiceId" class="com.itheima.b_factory_bean.UserServiceImpl"></bean>

????<!-- 2 创建切面类 -->

????<bean id="myAspectId" class="com.itheima.b_factory_bean.MyAspect"></bean>

?

????<!-- 3 创建代理类

????????* 使用工厂bean FactoryBean ，底层调用 getObject() 返回特殊bean

????????* ProxyFactoryBean 用于创建代理工厂bean，生成特殊代理对象

????????????interfaces : 确定接口们

????????????????通过<array>可以设置多个值

????????????????只有一个值时，value=""

????????????target : 确定目标类

????????????interceptorNames : 通知 切面类的名称，类型String[]，如果设置一个值 value=""

????????????optimize :强制使用cglib

????????????????<property name="optimize" value="true"></property>

????????底层机制

????????????如果目标类有接口，采用jdk动态代理

????????????如果没有接口，采用cglib 字节码增强

????????????如果声明 optimize = true ，无论是否有接口，都采用cglib

????????

????-->

????<bean id="proxyServiceId" class="org.springframework.aop.framework.ProxyFactoryBean">

????????<property name="interfaces" value="com.itheima.b_factory_bean.UserService"></property>

????????<property name="target" ref="userServiceId"></property>

????????<property name="interceptorNames" value="myAspectId"></property>

????</bean>

????@Test

????public void demo01(){

????????String xmlPath = "com/itheima/b_factory_bean/beans.xml";

????????ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);

????????

????????//获得代理类

????????UserService userService = (UserService) applicationContext.getBean("proxyServiceId");

????????userService.addUser();

????????userService.updateUser();

????????userService.deleteUser();

????}

<?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.xsd">

????<!-- 1 创建目标类 -->

????<bean id="userServiceId" class="com.itheima.c_spring_aop.UserServiceImpl"></bean>

????<!-- 2 创建切面类（通知） -->

????<bean id="myAspectId" class="com.itheima.c_spring_aop.MyAspect"></bean>

????<!-- 3 aop编程

????????3.1 导入命名空间

????????3.2 使用 <aop:config>进行配置

????????????????proxy-target-class="true" 声明时使用cglib代理

????????????<aop:pointcut> 切入点 ，从目标对象获得具体方法

????????????<aop:advisor> 特殊的切面，只有一个通知 和 一个切入点

????????????????advice-ref 通知引用

????????????????pointcut-ref 切入点引用

????????3.3 切入点表达式

????????????execution(* com.itheima.c_spring_aop.*.*(..))

????????????选择方法 返回值任意 包 类名任意 方法名任意 参数任意

????????

????-->

????<aop:config proxy-target-class="true">

????????<aop:pointcut expression="execution(* com.itheima.c_spring_aop.*.*(..))" id="myPointCut"/>

????????<aop:advisor advice-ref="myAspectId" pointcut-ref="myPointCut"/>

????</aop:config>

</beans>

????@Test

????public void demo01(){

????????String xmlPath = "com/itheima/c_spring_aop/beans.xml";

????????ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);

????????

????????//获得目标类

????????UserService userService = (UserService) applicationContext.getBean("userServiceId");

????????userService.addUser();

????????userService.updateUser();

????????userService.deleteUser();

????}

环绕

?

try{

//前置：before

//手动执行目标方法

//后置：afterRetruning

} catch(){

//抛出异常 afterThrowing

} finally{

//最终 after

}?

/**

* 切面类，含有多个通知

*/

public class MyAspect {

????

????public void myBefore(JoinPoint joinPoint){

????????System.out.println("前置通知 ： " + joinPoint.getSignature().getName());

????}

????

????public void myAfterReturning(JoinPoint joinPoint,Object ret){

????????System.out.println("后置通知 ： " + joinPoint.getSignature().getName() + " , -->" + ret);

????}

????

????public Object myAround(ProceedingJoinPoint joinPoint) throws Throwable{

????????System.out.println("前");

????????//手动执行目标方法

????????Object obj = joinPoint.proceed();

????????

????????System.out.println("后");

????????return obj;

????}

????

????public void myAfterThrowing(JoinPoint joinPoint,Throwable e){

????????System.out.println("抛出异常通知 ： " + e.getMessage());

????}

????

????public void myAfter(JoinPoint joinPoint){

????????System.out.println("最终通知");

????}

?

}

<!-- 1 创建目标类 -->

????<bean id="userServiceId" class="com.itheima.d_aspect.a_xml.UserServiceImpl"></bean>

????<!-- 2 创建切面类（通知） -->

????<bean id="myAspectId" class="com.itheima.d_aspect.a_xml.MyAspect"></bean>

????<!-- 3 aop编程

????????<aop:aspect> 将切面类 声明"切面"，从而获得通知（方法）

????????????ref 切面类引用

????????<aop:pointcut> 声明一个切入点，所有的通知都可以使用。

????????????expression 切入点表达式

????????????id 名称，用于其它通知引用

????-->

????<aop:config>

????????<aop:aspect ref="myAspectId">

????????????<aop:pointcut expression="execution(* com.itheima.d_aspect.a_xml.UserServiceImpl.*(..))" id="myPointCut"/>

????????????

????????????<!-- 3.1 前置通知

????????????????<aop:before method="" pointcut="" pointcut-ref=""/>

????????????????????method : 通知，及方法名

????????????????????pointcut :切入点表达式，此表达式只能当前通知使用。

????????????????????pointcut-ref ： 切入点引用，可以与其他通知共享切入点。

????????????????通知方法格式：public void myBefore(JoinPoint joinPoint){

????????????????????参数1：org.aspectj.lang.JoinPoint 用于描述连接点（目标方法），获得目标方法名等

????????????????例如：

????????????<aop:before method="myBefore" pointcut-ref="myPointCut"/>

????????????-->

????????????

????????????<!-- 3.2后置通知 ,目标方法后执行，获得返回值

????????????????<aop:after-returning method="" pointcut-ref="" returning=""/>

????????????????????returning 通知方法第二个参数的名称

????????????????通知方法格式：public void myAfterReturning(JoinPoint joinPoint,Object ret){

????????????????????参数1：连接点描述

????????????????????参数2：类型Object，参数名 returning="ret" 配置的

????????????????例如：

????????????<aop:after-returning method="myAfterReturning" pointcut-ref="myPointCut" returning="ret" />

????????????-->

????????????

????????????<!-- 3.3 环绕通知

????????????????<aop:around method="" pointcut-ref=""/>

????????????????通知方法格式：public Object myAround(ProceedingJoinPoint joinPoint) throws Throwable{

????????????????????返回值类型：Object

????????????????????方法名：任意

????????????????????参数：org.aspectj.lang.ProceedingJoinPoint

????????????????????抛出异常

????????????????执行目标方法：Object obj = joinPoint.proceed();

????????????????例如：

????????????<aop:around method="myAround" pointcut-ref="myPointCut"/>

????????????-->

????????????<!-- 3.4 抛出异常

????????????????<aop:after-throwing method="" pointcut-ref="" throwing=""/>

????????????????????throwing ：通知方法的第二个参数名称

????????????????通知方法格式：public void myAfterThrowing(JoinPoint joinPoint,Throwable e){

????????????????????参数1：连接点描述对象

????????????????????参数2：获得异常信息，类型Throwable ，参数名由throwing="e" 配置

????????????????例如：

????????????<aop:after-throwing method="myAfterThrowing" pointcut-ref="myPointCut" throwing="e"/>

????????????-->

????????????<!-- 3.5 最终通知 -->????????????

????????????<aop:after method="myAfter" pointcut-ref="myPointCut"/>

???????????? ?

????????????

????????????

????????</aop:aspect>

????</aop:config>

<!-- 1 创建目标类 -->

????<bean id="userServiceId" class="com.itheima.d_aspect.b_anno.UserServiceImpl"></bean>

????<!-- 2 创建切面类（通知） -->

????<bean id="myAspectId" class="com.itheima.d_aspect.b_anno.MyAspect"></bean>

<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/aop

???????????????????? http://www.springframework.org/schema/aop/spring-aop.xsd

???????????????????? http://www.springframework.org/schema/context

???????????????????? http://www.springframework.org/schema/context/spring-context.xsd">

<!-- 1.扫描 注解类 -->

????<context:component-scan base-package="com.itheima.d_aspect.b_anno"></context:component-scan>

<!-- 2.确定 aop注解生效 -->

????<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

<aop:aspect ref="myAspectId">

<aop:before method="myBefore" pointcut="execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))"/>

????//切入点当前有效

????@Before("execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))")

????public void myBefore(JoinPoint joinPoint){

????????System.out.println("前置通知 ： " + joinPoint.getSignature().getName());

????}

<aop:pointcut expression="execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))" id="myPointCut"/>

//声明公共切入点

????@Pointcut("execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))")

????private void myPointCut(){

????}

<aop:after-returning method="myAfterReturning" pointcut-ref="myPointCut" returning="ret" />

????@AfterReturning(value="myPointCut()" ,returning="ret")

????public void myAfterReturning(JoinPoint joinPoint,Object ret){

????????System.out.println("后置通知 ： " + joinPoint.getSignature().getName() + " , -->" + ret);

????}

<aop:around method="myAround" pointcut-ref="myPointCut"/>

@Around(value = "myPointCut()")

????public Object myAround(ProceedingJoinPoint joinPoint) throws Throwable{

????????System.out.println("前");

????????//手动执行目标方法

????????Object obj = joinPoint.proceed();

????????

????????System.out.println("后");

????????return obj;

????}

<aop:after-throwing method="myAfterThrowing" pointcut="execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))" throwing="e"/>

@AfterThrowing(value="execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))" ,throwing="e")

????public void myAfterThrowing(JoinPoint joinPoint,Throwable e){

????????System.out.println("抛出异常通知 ： " + e.getMessage());

????}

/**

* 切面类，含有多个通知

*/

@Component

@Aspect

public class MyAspect {

????

????//切入点当前有效

//????@Before("execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))")

????public void myBefore(JoinPoint joinPoint){

????????System.out.println("前置通知 ： " + joinPoint.getSignature().getName());

????}

????

????//声明公共切入点

????@Pointcut("execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))")

????private void myPointCut(){

????}

????

//????@AfterReturning(value="myPointCut()" ,returning="ret")

????public void myAfterReturning(JoinPoint joinPoint,Object ret){

????????System.out.println("后置通知 ： " + joinPoint.getSignature().getName() + " , -->" + ret);

????}

????

//????@Around(value = "myPointCut()")

????public Object myAround(ProceedingJoinPoint joinPoint) throws Throwable{

????????System.out.println("前");

????????//手动执行目标方法

????????Object obj = joinPoint.proceed();

????????

????????System.out.println("后");

????????return obj;

????}

????

//????@AfterThrowing(value="execution(* com.itheima.d_aspect.b_anno.UserServiceImpl.*(..))" ,throwing="e")

????public void myAfterThrowing(JoinPoint joinPoint,Throwable e){

????????System.out.println("抛出异常通知 ： " + e.getMessage());

????}

????

????@After("myPointCut()")

????public void myAfter(JoinPoint joinPoint){

????????System.out.println("最终通知");

????}

?

}

<!-- 1.扫描 注解类 -->

????<context:component-scan base-package="com.itheima.d_aspect.b_anno"></context:component-scan>

????

????<!-- 2.确定 aop注解生效 -->

????<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

create database ee19_spring_day02;

use ee19_spring_day02;

create table t_user(

id int primary key auto_increment,

username varchar(50),

password varchar(32)

);

?

insert into t_user(username,password) values(‘jack‘,‘1234‘);

insert into t_user(username,password) values(‘rose‘,‘5678‘);

package com.itheima.domain;

?

public class User {

????

????private Integer id;

????private String username;

????private String password;

public static void main(String[] args) {

????????

????????//1 创建数据源（连接池） dbcp

????????BasicDataSource dataSource = new BasicDataSource();

????????// * 基本4项

????????dataSource.setDriverClassName("com.mysql.jdbc.Driver");

????????dataSource.setUrl("jdbc:mysql://localhost:3306/ee19_spring_day02");

????????dataSource.setUsername("root");

????????dataSource.setPassword("1234");

???????? ?

????????

????????//2 创建模板

????????JdbcTemplate jdbcTemplate = new JdbcTemplate();

????????jdbcTemplate.setDataSource(dataSource);

???????? ?

????????

????????//3 通过api操作

????????jdbcTemplate.update("insert into t_user(username,password) values(?,?);", "tom","998");

????????

????}

<!-- 创建数据源 -->

????<bean id="dataSourceId" class="org.apache.commons.dbcp.BasicDataSource">

????????<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>

????????<property name="url" value="jdbc:mysql://localhost:3306/ee19_spring_day02"></property>

????????<property name="username" value="root"></property>

????????<property name="password" value="1234"></property>

????</bean>

????<!-- 创建模板 ,需要注入数据源-->

????<bean id="jdbcTemplateId" class="org.springframework.jdbc.core.JdbcTemplate">

????????<property name="dataSource" ref="dataSourceId"></property>

????</bean>

????

????<!-- 配置dao -->

????<bean id="userDaoId" class="com.itheima.c_dbcp.UserDao">

????????<property name="jdbcTemplate" ref="jdbcTemplateId"></property>

????</bean>

<!-- 创建数据源 c3p0-->

????<bean id="dataSourceId" class="com.mchange.v2.c3p0.ComboPooledDataSource">

????????<property name="driverClass" value="com.mysql.jdbc.Driver"></property>

????????<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ee19_spring_day02"></property>

????????<property name="user" value="root"></property>

????????<property name="password" value="1234"></property>

????</bean>

????<!-- 配置dao

????????* dao 继承 JdbcDaoSupport，之后只需要注入数据源，底层将自动创建模板

????-->

????<bean id="userDaoId" class="com.itheima.e_jdbcdaosupport.UserDao">

????????<property name="dataSource" ref="dataSourceId"></property>

????</bean>

jdbc.driverClass=com.mysql.jdbc.Driver

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ee19_spring_day02?useUnicode&amp;characterEncoding=utf8

jdbc.user=root

jdbc.password=1234

<!-- 加载配置文件

????????"classpath:"前缀表示 在src下

????????在配置文件之后通过 ${key} 获得内容

????-->

????<context:property-placeholder location="classpath:com/itheima/f_properties/jdbcInfo.properties"/>

????

????<!-- 创建数据源 c3p0-->

????<bean id="dataSourceId" class="com.mchange.v2.c3p0.ComboPooledDataSource">

????????<property name="driverClass" value="${jdbc.driverClass}"></property>

????????<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>

????????<property name="user" value="${jdbc.user}"></property>

????????<property name="password" value="${jdbc.password}"></property>

????</bean>