Spring学习一：IOC（控制反转）和AOP（面向切面）的xml配置和注解方式

Spring框架的作用：为了简化java开发

Spring是一个开源框架，Spring是于2003 年兴起的一个轻量级的Java 开发框架，由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的

       一.IOC（控制反转）

               1 构造器注入

                       （xml配置）

               2方法注入

                      （注解方式）

                      （xml配置）

      二，AOP（面向切面）

                注解方式

                xml配置

只是使用，那简单，原理后面补上

代码架构

spring-test.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: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-3.0.xsd                 http://www.springframework.org/schema/context                 http://www.springframework.org/schema/context/spring-context-3.0.xsd                 http://www.springframework.org/schema/aop                  http://www.springframework.org/schema/aop/spring-aop-3.0.xsd                ">    <!-- 注解支持,为了让我们可以使用注解创建bean --><context:annotation-config /><!--设置要扫描的包的位置 -->    <context:component-scan   base-package="com.eyugame.test" /><!-- 支持aop注解 --><aop:aspectj-autoproxy /><aop:config ><!-- 配置aop触发调用的类是myService也就是下面对应的MyServiceImpl --><aop:aspect id="spect" ref="myAop"><!-- 配置调用com.eyugame.test.MyBean的toDo()方法的时候触发aop --><aop:pointcut id="target"expression="execution(* com.eyugame.test.MyBean.toDo(..))" /><!-- 执行前调用,调用方法为doBefore --><aop:before pointcut-ref="target" method="doBefore()" /><!-- 执行后调用，调用方法为doAfter --><aop:after pointcut-ref="target" method="doAfter()" /><!-- 返回时调用,调用方法doReturn --><aop:after-returning pointcut-ref="target"method="doReturn()" /><!-- 抛出异常时候调用,调用方法doReturn --><aop:after-throwing pointcut-ref="target" method="doThrowing()"throwing="ex" /><!-- 注意 aop:aroup在新版本spring好像失效，坑我 --><!-- <aop:around pointcut-ref="businessService" method="doAround"/> --></aop:aspect></aop:config><bean id="myAop" class="com.eyugame.test.MyAop"></bean><bean id="depedecyBean" class="com.eyugame.test.DependencyBean"></bean><!-- 依赖注入1构造器注入 --><bean id="myBean" class="com.eyugame.test.MyBean"><constructor-arg ref="depedecyBean"></constructor-arg></bean><!-- 依赖注入2设值注入 --><bean id="myBean2" class="com.eyugame.test.MyBean2"><!-- 名称要跟类里面要注入的类的名字一致 --><property name="iDependency" ref="depedecyBean"></property></bean><!-- 注解Aop --><bean id="myAop2" class="com.eyugame.test.MyAop2"></bean></beans>

依赖注入时的接口

package com.eyugame.test;public interface IDependency {     void  show();}

依赖注入的具体类

package com.eyugame.test;public class DependencyBean implements IDependency {public void show() {System.out.println("my class name:" + this.getClass());}}

AOP类

package com.eyugame.test;public class MyAop {public MyAop() {};public void doBefore() {System.out.println("执行前调用");}public void doAfter() {System.out.println("执行后调用");}public void doReturn() {System.out.println("结束时候调用");}public void doThrowing() {System.out.println("有异常时候调用"); }}

package com.eyugame.test;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;/*注解AOP*/@Aspectpublic class MyAop2 {public MyAop2() {};@Pointcut(value= "execution(* com.eyugame.test.MyBean2.toDo(..))")private void init() {}@Before("execution(* com.eyugame.test.MyBean2.toDo(..))")public void doBefore() {System.out.println("执行前调用");}@After("execution(* com.eyugame.test.MyBean2.toDo(..))")public void doAfter() {System.out.println("执行后调用");}@AfterReturning("execution(* com.eyugame.test.MyBean2.toDo(..))")public void doReturn() {System.out.println("结束时候调用");}@AfterThrowing("execution(* com.eyugame.test.MyBean2.toDo(..))")public void doThrowing() {System.out.println("有异常时候调用");}}

构造器注入

package com.eyugame.test;public class MyBean {     private IDependency iDependency;          public MyBean(){          }     /*依赖注入1：构造器注入*/     public MyBean(IDependency iDependency){     this.iDependency=iDependency;     }     public void toDo() {    this.iDependency.show();     }     }

package com.eyugame.test;/*方法注入*/public class MyBean2 {        private IDependency iDependency;    public MyBean2() {    }    public void toDo() {        this.iDependency.show();    }    /* 依赖注入2：之设值注入 */    public void setiDependency(IDependency iDependency) {        this.iDependency = iDependency;    }}

注解创建的Bean

package com.eyugame.test;import org.springframework.stereotype.Component;@Component("myBean3")public class MyBean3 {public void show() {System.out.println("my name is MyBean3");}}

测试

import com.eyugame.test.MyBean;import com.eyugame.test.MyBean2;import com.eyugame.test.MyBean3;public class TestSpring {@SuppressWarnings("resource")public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("config/spring/spring-test.xml");System.out.println("使用构造器注入和配置aop-------------");/*依赖注入一：构造器注入|aop测试*/MyBean myBean =  context.getBean("myBean",MyBean.class);myBean.toDo();System.out.println("使用方法注入和注解aop-----------");/*依赖注入二：方法注入*/MyBean2 myBean2 = context.getBean("myBean2",MyBean2.class);myBean2.toDo();/*使用注解创建bean*/System.out.println("使用注解创建bean-----------");MyBean3 myBean3=context.getBean("myBean3",MyBean3.class);myBean3.show();}}

依赖的包

<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>Test</groupId><artifactId>test2</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>test2</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!--各个jar的版本 --><spring.version>3.2.3.RELEASE</spring.version><junit.version>4.11</junit.version><jsonlib.version>2.4</jsonlib.version><shiro.version>1.2.0</shiro.version></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>${junit.version}</version><scope>test</scope></dependency><!-- Spring jars --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.5</version></dependency><!-- <dependency> <groupId> org.aspectj</groupId> <artifactId> aspectjweaver</artifactId> <version> 1.6.11</version> </dependency> --></dependencies></project>

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