Spring中IOC（反转控制） 和 AOP（面向方面编程）

一、IOC
基本注入和集合注入

实体类Bean--配置文件（applicationContext）--测试类(Test)

1.1 实体Bean：属性+getter()方法+setter()方法

public class MyBean {
private String url;
private String name;
private String pwd;
private int age;
private List list;
private Set set;
private Map map;
private Properties prop;
public String getUrl() {
    return url;
}
public void setUrl(String url) {
    this.url = url;
}

//----此处省略其他属性的getter()和setter()方法----

1.2 Spring配置文件： 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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <bean id="myBean" class="tarena.MyIoc.MyBean">
        <property name="url">
            <value>www.163.com</value>
        </property>
        <property name="name">
            <value>xuliang</value>
        </property>
        <property name="pwd" value="123456"></property>
        <property name="age">
            <value>25</value>
        </property>
        <property name="list">
            <list>
                <value>ibm</value>
                <value>sun</value>
                <value>oracle</value>
            </list>
        </property>
        <property name="set">
            <set>
                <value>music</value>
                <value>sleeping</value>
                <value>sports</value>
            </set>
        </property>
        <property name="map">
            <map>
                <entry key="mySister" value="yanmei"></entry>
                <entry key="myMother" value="wenxian"></entry>
                <entry key="myFather" value="guoxian"></entry>
            </map>
        </property>
    </bean>
</beans>

1.3 Test类：用于通过  ApplicationContext的方法getBean(..)获取myBean的属性值。

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext(
                "tarena/MyIoc/applicationContext.xml");
        MyBean myBean = (MyBean) ctx.getBean("myBean");
        System.out.println(myBean.getUrl());
        System.out.println(myBean.getName());
        System.out.println(myBean.getPwd());
        System.out.println(myBean.getAge());
        System.out.println(myBean.getList());
        System.out.println(myBean.getSet());
        System.out.println(myBean.getMap());
        System.out.println();
    }
}

---------------------------运行结果-----------------------------
www.163.com
xuliang
123456
25
[ibm, sun, oracle]
[music, sleeping, sports]
{mySister=yanmei, myMother=wenxian, myFather=guoxian}
---------------------------------------------------------------------

二、AOP（面向方面编程）
Aspect Oriented Programming
目标对象（TargetObject）和切面（TransactionAspect）--配置文件（applicationContext）--测试类(Test)

2.1 目标对象类（TargetObject）

public class TargetObject {
  public void add(){
     System.out.println("我添加了一些东西。。。");
  }
  public void update(){
     System.out.println("我更新了一些东西。。。");
 }
}

2.2  切面（TransactionAspect）

import org.aspectj.lang.ProceedingJoinPoint;

public class TransactionAspect {
    public void beforeMethod() {
        System.out.println("对象方法开始之前的操作。。。");
    }
    public void afterMethod() {
        System.out.println("对象方法之后的操作。。。");
    }
    public Object roundMethod(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕方法上。。。");
        Object object = pjp.proceed();
        System.out.println("环绕方法下。。。。");
        return object;
    }
    public void throwMethod() {
        new RuntimeException();
        System.out.println("异常出现执行的操作。。。");
    }
    public void afterReturningMethod() {
        System.out.println("---afterReturning--的操作。。。");
    }
}

2.3  配置文件（applicationContext）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
     <!-- 目标对象 -->
    <bean id="targetObject" class="tarena.myAop.TargetObject"></bean>
   <!-- 切面对象 -->
    <bean id="transactionAspect" class="tarena.myAop.TransactionAspect"></bean>
    <aop:config>
    <!-- 定义切面aspect-->
        <aop:aspect id="myAspect" ref="transactionAspect">
    <!--切入点pointcut-->
            <aop:pointcut id="transcut" expression="execution(* tarena.myAop.*.* (..))" />
 <!--定义通知--前置通知、后置通知、最终通知、环绕通知>
            <aop:before pointcut-ref="transcut" method="beforeMethod" />
            <aop:after pointcut-ref="transcut" method="afterMethod" />
            <aop:after-returning pointcut-ref="transcut"
                method="afterReturningMethod" />
            <aop:around pointcut-ref="transcut" method="roundMethod" />
        </aop:aspect>
    </aop:config>
</beans>

2.4  测试类(Test)

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class AOPTest {
    public static void main(String[] args){
        ApplicationContext ctx=new ClassPathXmlApplicationContext(
                "tarena/myAop/applicationContext.xml");
        TargetObject targetObject= (TargetObject) ctx.getBean("targetObject");
        targetObject.add();
    }
}