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spring核心点总结
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="http://www.mamicode.com/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
spring核心点总结