Spring Learning One: the IOC (inversion of control) and AOP (aspect-oriented) XML configuration and annotation methods

The role of the spring framework: To simplify Java development

Spring is an open source framework, and spring is a lightweight Java development framework that emerged in 2003 by Rod Johnson in his book expert one-on-one development and Some of the concepts and prototypes elaborated in design are derived. It is created to address the complexities of enterprise application development

I. IOC (Control reversal)

1 constructor Injection

(XML configuration)

2 Method Injection

(Annotation method)

(XML configuration)

Two, AOP (face-tangent)

Annotation method

XML configuration

Just use, that's simple, the principle behind the

Code schema

Spring-test.xml

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans" Xmlns:xs I= "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/s Chema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd HTTP://WWW.SP                 Ringframework.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-ao P-3.0.xsd > <!--annotation support, in order for us to use annotations to create a bean--><context:annotation-config/><!--Set the bits of the package to be scanned --<context:component-scan base-package= "Com.eyugame.test"/><!--support AOP annotations--><aop:aspectj-autop Roxy/><aop:config ><!--configuration aoP The class that triggers the call is MyService, which corresponds to Myserviceimpl--><aop:aspect id= "spect" ref= "MYAOP" ><!-- Configuring the Todo () method to invoke Com.eyugame.test.MyBean triggers the AOP--><aop:pointcut id= "target" expression= "Execution (* Com.eyugame.test.MyBean.toDo (..)) " /><!--called before execution, calling method Dobefore--><aop:before pointcut-ref= "target" method= "Dobefore ()"/><!--after execution, Call method Doafter--><aop:after pointcut-ref= "target" method= "Doafter ()"/><!--return call, Method Doreturn-->< Aop:after-returning pointcut-ref= "target" method= "Doreturn ()"/><!--throws an exception when called, calling method Doreturn--&GT;&LT;AOP: After-throwing pointcut-ref= "target" method= "dothrowing ()" throwing= "ex"/><!--note aop:aroup in the new version spring seems to lapse, pit me-- -><!--<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><!--Dependency Injection 1 constructor injected--><bean ID= "Mybean" class= "Com.eyugame.test.MyBean" ><constructor-arg ref= "Depedecybean" ></constructor-arg> </bean><!--Dependency Injection 2 setpoint injection--><bean id= "myBean2" class= "com.eyugame.test.MyBean2" ><!-- The name is consistent with the name of the class to be injected into the class--><property name= "Idependency" ref= "Depedecybean" ></property></bean><! --Annotated AOP--><bean id= "MyAop2" class= "Com.eyugame.test.MyAop2" ></bean></beans>

Interface for Dependency Injection

Package Com.eyugame.test;public interface Idependency {     void  Show ();}

Specific classes of dependency injection

Package Com.eyugame.test;public class Dependencybean implements idependency {public void Show () {System.out.println ("my Class Name: "+ This.getclass ());}}

AOP Classes

Package Com.eyugame.test;public class Myaop {public Myaop () {};p ublic void Dobefore () {System.out.println ("Call before Execution");} public void Doafter () {System.out.println (called after execution);} public void Doreturn () {System.out.println ("at the end of the call");} public void dothrowing () {System.out.println ("called with Exception");}}

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;/* annotation 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 ("Call before Execution");} @After ("Execution (* com.eyugame.test.MyBean2.toDo (..))") public void Doafter () {System.out.println (called after execution);} @AfterReturning ("Execution (* com.eyugame.test.MyBean2.toDo (..))") public void Doreturn () {System.out.println ("at the end of the call");} @AfterThrowing ("Execution (* com.eyugame.test.MyBean2.toDo (..))") public void dothrowing () {System.out.println ("called with Exception");}}

Constructor injection

Package Com.eyugame.test;public class Mybean {     private idependency idependency;          Public Mybean () {          }/     * Dependency Injection 1: Constructor injection */public     Mybean (idependency idependency) {     this.idependency= idependency;     }     public void ToDo () {    this.iDependency.show ();     }     }

The package com.eyugame.test;/* method injects */public class MyBean2 {private Idependency idependency;    Public MyBean2 () {} public void ToDo () {this.iDependency.show ();    }/* Dependency Injection 2: Set Value injection */public void setidependency (Idependency idependency) {this.idependency = idependency; }}

Annotation-Created 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");}}

Test

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 ("Using the constructor to inject and configure AOP-------------");/* Dependency Injection One: constructor injection |AOP test */mybean Mybean =  Context.getbean (" Mybean ", Mybean.class); Mybean.todo (); System.out.println ("Using methods to inject and annotate AOP-----------");/* Dependency Injection Two: Method injection */mybean2 myBean2 = Context.getbean ("MyBean2", Mybean2.class), Mybean2.todo ();/* Create bean*/system.out.println with annotations ("Create bean-----------with annotations"); MyBean3 Mybean3=context.getbean ("MyBean3", Mybean3.class); Mybean3.show ();}}

Dependent packages

<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><!--versions of each jar--><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>

Console output

Spring Learning One: the IOC (inversion of control) and AOP (aspect-oriented) XML configuration and annotation methods