Spring中MethodBeforeAdvice，AfterReturningAdvice类对消息的管理和使用

电玩女神 2023-07-20 12:18 82阅读 0赞

Spring中对消息机制的使用，我们首先使用继承类的方法完成  
通过使用idea工具下的Maven聚合项目方式来编写的案例  
项目整体架构  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70]  
父项目的pom.xml中定义了所有的包

<?xml version="1.0" encoding="UTF-8"?>
    <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/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.zxf</groupId>
      <artifactId>SpringProject</artifactId>
      <packaging>pom</packaging>
      <version>1.0-SNAPSHOT</version>
      <modules>
        <module>Spring-web1</module>
          <module>Spring-test2</module>
      </modules>
        
        <properties>
            <junit.version>4.12</junit.version>
            <mybatis.version>3.2.8</mybatis.version>
            <mysql.version>5.1.32</mysql.version>
            <jstl.version>1.2</jstl.version>
            <servlet.version>3.1.0</servlet.version>
            <jsp.version>2.0</jsp.version>
            <log4j.version>1.2.17</log4j.version>
    
            <spring-aop.version>4.1.6.RELEASE</spring-aop.version>
            <spring-aspects.version>4.1.6.RELEASE</spring-aspects.version>
            <spring-beans.version>4.1.6.RELEASE</spring-beans.version>
            <spring-context.version>4.1.6.RELEASE</spring-context.version>
            <spring-context-support.version>4.1.6.RELEASE</spring-context-support.version>
            <spring-core.version>4.1.6.RELEASE</spring-core.version>
            <spring-expression.version>4.1.6.RELEASE</spring-expression.version>
            <spring-instrument.version>4.1.6.RELEASE</spring-instrument.version>
            <spring-instrument-tomcat.version>4.1.6.RELEASE</spring-instrument-tomcat.version>
            <spring-jdbc.version>4.1.6.RELEASE</spring-jdbc.version>
            <spring-jms.version>4.1.6.RELEASE</spring-jms.version>
            <spring-messaging.version>4.1.6.RELEASE</spring-messaging.version>
            <spring-orm.version>4.1.6.RELEASE</spring-orm.version>
            <spring-oxm.version>4.1.6.RELEASE</spring-oxm.version>
            <spring-test.version>4.1.6.RELEASE</spring-test.version>
            <spring-tx.version>4.1.6.RELEASE</spring-tx.version>
            <spring-webmvc.version>4.1.6.RELEASE</spring-webmvc.version>
            <spring-web.version>4.1.6.RELEASE</spring-web.version>
            <spring-webmvc-portlet.version>4.1.6.RELEASE</spring-webmvc-portlet.version>
            <spring-websocket.version>4.1.6.RELEASE</spring-websocket.version>
            <commons-logging.version>1.1.3</commons-logging.version>
            <asm.version>3.3.1</asm.version>
            <cglib.version>2.2.2</cglib.version>
            <javassist.version>3.17.1-GA</javassist.version>
            <mybatis-spring.version>1.2.3</mybatis-spring.version>
            <standard.version>1.1.2</standard.version>
            <aopalliance.version>1.0</aopalliance.version>
            <aspectjweaver.version>1.7.4</aspectjweaver.version>
        </properties>
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                    <version>${ junit.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis</artifactId>
                    <version>${ mybatis.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>${ mysql.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>jstl</groupId>
                    <artifactId>jstl</artifactId>
                    <version>${ jstl.version}</version>
                </dependency>
            
                <dependency>
                    <groupId>javax.servlet</groupId>
                    <artifactId>javax.servlet-api</artifactId>
                    <version>${ servlet.version}</version>
                    <scope>provided</scope>
                </dependency>
                <dependency>
                    <groupId>javax.servlet</groupId>
                    <artifactId>jsp-api</artifactId>
                    <version>${ jsp.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                    <version>${ log4j.version}</version>
                </dependency>
                
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aop</artifactId>
                    <version>${ spring-aop.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aspects</artifactId>
                    <version>${ spring-aspects.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-beans</artifactId>
                    <version>${ spring-beans.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context</artifactId>
                    <version>${ spring-context.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context-support</artifactId>
                    <version>${ spring-context-support.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                    <version>${ spring-core.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-expression</artifactId>
                    <version>${ spring-expression.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-instrument</artifactId>
                    <version>${ spring-instrument.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-instrument-tomcat</artifactId>
                    <version>${ spring-instrument-tomcat.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-jdbc</artifactId>
                    <version>${ spring-jdbc.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-jms</artifactId>
                    <version>${ spring-jms.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-messaging</artifactId>
                    <version>${ spring-messaging.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-orm</artifactId>
                    <version>${ spring-orm.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-oxm</artifactId>
                    <version>${ spring-oxm.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-test</artifactId>
                    <version>${ spring-test.version}</version>
                    <scope>test</scope>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-tx</artifactId>
                    <version>${ spring-tx.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-web</artifactId>
                    <version>${ spring-web.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-webmvc</artifactId>
                    <version>${ spring-webmvc.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-webmvc-portlet</artifactId>
                    <version>${ spring-webmvc-portlet.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-websocket</artifactId>
                    <version>${ spring-websocket.version}</version>
                </dependency>
                
                
                <dependency>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                    <version>${ commons-logging.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>asm</groupId>
                    <artifactId>asm</artifactId>
                    <version>${ asm.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>cglib</groupId>
                    <artifactId>cglib</artifactId>
                    <version>${ cglib.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.javassist</groupId>
                    <artifactId>javassist</artifactId>
                    <version>${ javassist.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis-spring</artifactId>
                    <version>${ mybatis-spring.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>aopalliance</groupId>
                    <artifactId>aopalliance</artifactId>
                    <version>${ aopalliance.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>org.aspectj</groupId>
                    <artifactId>aspectjweaver</artifactId>
                    <version>${ aspectjweaver.version}</version>
                </dependency>
    
    
            </dependencies>
        </dependencyManagement>
       <build>
           <resources>
               <resource>
                   <directory>src/main/java</directory>
                   <includes>
                       <include>**/*.xml</include> </includes> </resource> <resource> <directory>src/main/resouces</directory> <includes> <include>**/*.xml</include>
                       <include>**/*.properties</include> </includes> </resource> </resources> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <configuration> <path>/</path> <port>9090</port> </configuration> </plugin> </plugins> </build> </project>

因为我们只是了AOP切面技术完成该案例，所有不需要完全导入父项目的JAR包。  
在Spring-test2下的pom.xml文件内容如下

在dome包中创建2个简单的类，为了之后调用该类下的方法来为消息机制做准备  
![在这里插入图片描述][2020040115525556.png]

package com.zxf.demo;
    
    public class Demo1 { 
        public void demo1(){ 
            System.out.println("demo1");
        }
        public void demo2(){ 
            System.out.println("demo2");
        }
        public void demo3(){ 
            System.out.println("demo3");
        }
    }

package com.zxf.demo;
    
    public class Demo2 { 
        public void f(){ 
            System.out.println("f()");
        }
    }

编写消息机制，本案例通过继承类放是完成  
![在这里插入图片描述][20200401155353756.png]

package com.zxf.advice;
    
    import org.springframework.aop.AfterReturningAdvice;
    
    import java.lang.reflect.Method;
    
    public class MyAfterAdvice implements AfterReturningAdvice { 
        public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable { 
            System.out.println("执行后发出的通知...");
        }
    }

package com.zxf.advice;
    
    import org.springframework.aop.MethodBeforeAdvice;
    
    import java.lang.reflect.Method;
    
    public class MyBeforeAdvice implements MethodBeforeAdvice { 
        public void before(Method method, Object[] objects, Object o) throws Throwable { 
                   System.out.println("执行前发出的通知。。");
        }
    }

下面来完成Spring核心配置文件的编写  
applicationContext.mxl

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:aop="http://www.springframework.org/schema/aop"
           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">
    <bean id="mybefore" class="com.zxf.advice.MyBeforeAdvice"/>
        <bean id="after" class="com.zxf.advice.MyAfterAdvice"/>
    <aop:config>
           <aop:pointcut id="aop1" expression="execution(* com.zxf.demo.*.*(..))"/>
           
           
           
        <aop:advisor advice-ref="after" pointcut-ref="aop1"/>
        <aop:advisor advice-ref="mybefore" pointcut-ref="aop1"/>
    </aop:config>
    <bean id="demo1" class="com.zxf.demo.Demo1"/>
    <bean id="demo2" class="com.zxf.demo.Demo2"/>
    </beans>

最后一个junit的方式测试类

package com.zxf;
    
    import com.zxf.demo.Demo1;
    import com.zxf.demo.Demo2;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Test1 { 
        @Test
        public void test1(){ 
            ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
            Demo1 d_1 = ac.getBean("demo1", Demo1.class);
            d_1.demo1();
            d_1.demo2();
            d_1.demo3();
            Demo2 d_2 = ac.getBean("demo2", Demo2.class);
              d_2.f();
    
        }
    }

运行结果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70]: /images/20230528/32441b66d7c544c480efe5949c3852c8.png
[2020040115525556.png]: /images/20230528/4b5e9343b8ae43ffaf98bf629279d871.png
[20200401155353756.png]: /images/20230528/8210f46849264740a7ebfe2c769e6c30.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70 1]: /images/20230528/7614edfedccf42158b8299f1ba619cda.png