Spring-------- 增強

spring的增強分類：前置增強，後置增強，異常增強，環繞增強。

增強的意義在於我們不改變接口，實現類，不動方法的前提下在原內容上增加內容。

首先我們看一下前置增強：前置增強必須實現的接口：MethodBeforeAdvice

MethodBeforeAdvice

package cn.happy.spring11;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public interface IDoSome {
    public void add();
    public void add1();
    public void add2();


}

package cn.happy.spring11;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class IDoSomes implements IDoSome{
    public void add() {
        System.out.println("=========1=======");
    }
    public void add1() {
        System.out.println("=========2=======");
    }public void add2() {
        System.out.println("=========3=======");
    }

}

package cn.happy.spring11;

import org.springframework.aop.MethodBeforeAdvice;

import java.lang.reflect.Method;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class MyBeforeAdvice implements MethodBeforeAdvice{
    public void before(Method method, Object[] objects, Object o) throws Throwable {
        System.out.println("=========before=======");
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring11.IDoSomes"></bean>
    <bean id="beforeAdvice" class="cn.happy.spring11.MyBeforeAdvice"></bean>
<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="beforeAdvice"></property>

</bean>

</beans>

@Test
  public void test01(){
      ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext07.xml");
      IDoSome i=(IDoSome)ctx.getBean("someProxy");
      i.add();
      i.add1();
      i.add2();
  }

下面是後置增強：實現的接口是：AfterReturningAdvice

package cn.happy.spring12;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public interface IDoSome {
    public void add();
    public String add1();
    public void add2();


}

package cn.happy.spring12;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class IDoSomes implements IDoSome {
    public void add() {
        System.out.println("=========1=======");
    }
    public String add1() {
        System.out.println("=========2=======");
        return "呵呵abc";
    }

    public void add2() {
        System.out.println("=========3=======");
    }

}

package cn.happy.spring12;

import org.springframework.aop.AfterReturningAdvice;
import org.springframework.aop.MethodBeforeAdvice;

import java.lang.reflect.Method;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class MyAfterAdvice implements AfterReturningAdvice{

    public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable {
        System.out.println("========after=======");
        if(o!=null){
            System.out.println(o.toString().toUpperCase());
        }
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring12.IDoSomes"></bean>
    <bean id="afterAdvice" class="cn.happy.spring12.MyAfterAdvice"></bean>
<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="afterAdvice"></property>

</bean>

</beans>

@Test
   public void test02(){
       ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext08.xml");
       cn.happy.spring12.IDoSome i=(cn.happy.spring12.IDoSome)ctx.getBean("someProxy");
       i.add();
      String id=i.add1();
       System.out.println(id);
       i.add2();
   }

下面是環繞增強：實現接口是：MethodInterceptor 

package cn.happy.spring13;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public interface IDoSome {
    public void add();
    public String add1();
    public void add2();


}

package cn.happy.spring13;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class IDoSomes implements IDoSome {
    public void add() {
        System.out.println("=========1=======");
    }
    public String add1() {
        System.out.println("=========2=======");
        return "呵呵abc";
    }

    public void add2() {
        System.out.println("=========3=======");
    }

}

package cn.happy.spring13;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class MethodAdvice implements MethodInterceptor {
    public Object invoke(MethodInvocation methodInvocation) throws Throwable {
        System.out.println("之前============");
       Object result=methodInvocation.proceed();
       String temp=null;
       if(result!=null){
           temp=(String)result;
           temp=temp.toUpperCase();
       }
        System.out.println("之後================");
        System.out.println("======temp========="+temp);
        return temp;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring13.IDoSomes"></bean>
    <bean id="methodAdvice" class="cn.happy.spring13.MethodAdvice"></bean>
<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="methodAdvice"></property>

</bean>

</beans>

@Test
  public void test03(){
      ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext09.xml");
      cn.happy.spring13.IDoSome i=(cn.happy.spring13.IDoSome)ctx.getBean("someProxy");
      i.add();
      String id=i.add1();
      System.out.println(id);
      i.add2();
  }

最後一個是異常增強：實現接口是：ThrowsAdvice

package cn.happy.spring14;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public interface IDoSome {
    public void add() throws UserException;
    public String add1();
    public void add2();


}

package cn.happy.spring14;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class IDoSomes implements IDoSome {
    public void add() throws UserException {
        System.out.println("=========1=======");
        throw new UserException("總算有錯了");
    }
    public String add1() {
        System.out.println("=========2=======");
        return "呵呵abc";
    }

    public void add2() {
        System.out.println("=========3=======");
    }

}

package cn.happy.spring14;

import org.springframework.aop.ThrowsAdvice;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class MyThrowsAdvice implements ThrowsAdvice{
    public void afterThrowing(UserException ex){
        System.out.println("錯誤提示："+ex.getMessage());
    }

}

package cn.happy.spring14;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class UserException extends Exception{
    public UserException() {
        super();
    }

    public UserException(String message) {
        super(message);
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring14.IDoSomes"></bean>
    <bean id="throwsAdvice" class="cn.happy.spring14.MyThrowsAdvice"></bean>
<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="throwsAdvice"></property>

</bean>

</beans>

@Test
  public void test04(){
      ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext10.xml");
      cn.happy.spring14.IDoSome i=(cn.happy.spring14.IDoSome)ctx.getBean("someProxy");
      try {
          i.add();
      } catch (UserException e) {
          e.printStackTrace();
      }
  }

還有2種配置文件改變 方法的前置增強

package cn.happy.spring16;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public interface IDoSome {
    public void adTd();
    public void adTd1();
    public void add2();


}

package cn.happy.spring16;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class IDoSomes implements IDoSome {
    public void adTd() {
        System.out.println("=========1=======");
    }
    public void adTd1() {
        System.out.println("=========2=======");
    }
    public void add2() {
        System.out.println("=========3=======");
    }

}

package cn.happy.spring16;

import org.springframework.aop.MethodBeforeAdvice;

import java.lang.reflect.Method;

/**
 * Created by lihuohuo on 2017/7/31.
 */
public class MyBeforeAdvice implements MethodBeforeAdvice{
    public void before(Method method, Object[] objects, Object o) throws Throwable {
        System.out.println("=========before=======");
    }
}

第一種使用方法名字 name 對特定的方法進行增強：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring15.IDoSomes"></bean>
    <bean id="beforeAdvice" class="cn.happy.spring15.MyBeforeAdvice"></bean>
    <bean id="beforeAdvisor" class="org.springframework.aop.support.NameMatchMethodPointcutAdvisor">
        <property name="advice" ref="beforeAdvice"></property>
        <property name="mappedNames" value="add"></property>

    </bean>

<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="beforeAdvisor"></property>

</bean>

</beans>

第二種 根據名的 .*T*.的這種方法

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
<bean id="Idosome" class="cn.happy.spring16.IDoSomes"></bean>
    <bean id="beforeAdvice" class="cn.happy.spring16.MyBeforeAdvice"></bean>
    <bean id="beforeAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
        <property name="advice" ref="beforeAdvice"></property>
        <property name="patterns" value=".*T.*"></property>

    </bean>

<bean id="someProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="target" ref="Idosome"></property>
    <property name="interceptorNames" value="beforeAdvisor"></property>
<property name="proxyTargetClass" value="true"></property>
</bean>

</beans>

下面是測試類 ，都是一樣的，。

@Test
public void test06(){
    ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext12.xml");
    cn.happy.spring16.IDoSome i=(cn.happy.spring16.IDoSome)ctx.getBean("someProxy");
    i.add2();
  i.adTd();
  i.adTd1();
}