1.依赖注入分为：设置注入和构造函数注入

1.1  设置注入的属性可以是基本类型，也可以是对象关键配置示例如下：

<bean  id=""  class="">

<property   name="age"  value="28"/>

<property  name="stone"  ref="bigStone"/>

</bean>

<bean  id="bigStone"  class="com.kerry.BigStone"/>

1.2 构造注入，通过构造函数注入，用index区分多个函数

<bean  id=""  class="">

<constructor-arg  index="0">

<ref  bean="bigStone"/>

<constructor-arg/>

<constructor-arg index="1">

<value> This is second parameter </value>

<constructor-arg/>

使用constructor-arg的type属性，避免构造子冲突

<constructor-arg  index="3"  type="string">

<value>This is third parameter</value>

<constructor-arg/>

</bean>

2 AOP

 1  /** 
 2  * 
 3   */ 
 4  package  com.dragon.study;
 5  
 6  /** 
 7  *  @author  dragon
 8  *
 9   */ 
10  public   interface  IStudent  {
11     
12      public   void  addStudent(String name);
13 } 
14

目标类StudentImpl

 2  * 
 3   */ 
 4  package  com.dragon.study.Impl;
 5  
 6  import  com.dragon.study.IStudent;
 7  
 8  /** 
 9  *  @author  dragon
10  *
11   */ 
12  public   class  StudentImpl  implements  IStudent {
13  
14        public   void  addStudent(String name) {
15          System.out.println( " 欢迎  " + name + "  你加入Spring家庭! " );
16      } 
17 } 
18

前置通知:BeforeAdvice.java

 package  com.dragon.Advice;
 5  
 6  import  java.lang.reflect.Method;
 7  
 8  import  org.springframework.aop.MethodBeforeAdvice;
 9  
10  /** 
11  *  @author  dragon
12  *
13   */ 
14  public   class  BeforeAdvice  implements  MethodBeforeAdvice {
15  
16        public   void  before(Method method,Object[] args, Object target)
17                  throws  Throwable {
18           
19           System.out.println( " 这是BeforeAdvice类的before方法. " );
20           
21       } 
22 }

后置通知:AfterAdvice.java

package com.dragon.Advice;
 5
 6import java.lang.reflect.Method;
 7
 8import org.springframework.aop.AfterReturningAdvice;
 9
10/**
11 * @author dragon
12 *
13 */
14public class AfterAdvice implements AfterReturningAdvice{
15    
16    public void afterReturning(Object returnValue ,Method method,
17                   Object[] args,Object target) throws Throwable{
18        System.out.println("这是AfterAdvice类的afterReturning方法.");
19    }
20      
21
22}

环绕通知:CompareInterceptor.java

package com.dragon.Advice;
 5
 6import org.aopalliance.intercept.MethodInterceptor;
 7import org.aopalliance.intercept.MethodInvocation;
 8
 9
10/**
11 * @author dragon
12 *
13 */
14public class CompareInterceptor implements MethodInterceptor{
15
16      public Object invoke(MethodInvocation invocation) throws Throwable{
17          Object result = null;
18         String stu_name = invocation.getArguments()[0].toString();
19         if ( stu_name.equals("dragon")){
20             //如果学生是dragon时,执行目标方法,
21              result= invocation.proceed();
22              
23         } else{
24             System.out.println("此学生是"+stu_name+"而不是dragon,不批准其加入.");
25         }
26        
27          return result;
28      }
29}

配置文件applicationContext.xml

 1<?xml version="1.0" encoding="UTF-8"?>
 2<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
 3
 4<beans>
 5
 6<bean id="beforeAdvice" class="com.dragon.Advice.BeforeAdvice"></bean>
 7<bean id="afterAdvice" class="com.dragon.Advice.AfterAdvice"></bean>
 8<bean id="compareInterceptor" class="com.dragon.Advice.CompareInterceptor"></bean>
 9<bean id="studenttarget" class="com.dragon.study.Impl.StudentImpl"></bean>
10
11<bean id="student" class="org.springframework.aop.framework.ProxyFactoryBean">
12  <property name="proxyInterfaces">
13    <value>com.dragon.study.IStudent</value>
14  </property>
15  <property name="interceptorNames">
16    <list>
17     <value>beforeAdvice</value>
18     <value>afterAdvice</value>
19    <value>compareInterceptor</value>  
20    </list>
21  </property>
22  <property name="target">
23    <ref bean="studenttarget"/>
24  </property>
25
26</bean>
27
28
29
30
31</beans>

现在开始写测试类,Test.java

4package com;
 5
 6import org.springframework.context.ApplicationContext;
 7import org.springframework.context.support.FileSystemXmlApplicationContext;
 8
 9import com.dragon.study.IStudent;
10
11/**
12 * @author dragon
13 *
14 */
15public class Test {
16
17    /**
18     * @param args
19     */
20    public static void main(String[] args) {
21        // TODO Auto-generated method stub
22      ApplicationContext ctx = 
23          new FileSystemXmlApplicationContext("/com/dragon/applicationContext.xml");
24      
25      IStudent person = (IStudent)ctx.getBean("student");
26      person.addStudent("dragon");
27      
28//      person.addStudent("javadragon");
29    }
30
31}

AOP部分代码来自 ：http://www.blogjava.net/javadragon/archive/2006/12/03/85115.html