<?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>GroupId</groupId>
    <artifactId>AOPAspectJSingleInstance</artifactId>
    <version>1.0-SNAPSHOT</version>
</project>

package com.spring.aop;

public class MessageWriter {
    public void writeMessage(){
        System.out.println("foobar()");
    }

    public void foo() {
        System.out.println("foo()");
    }
}

package com.spring.aop;

public aspect MessageWrapper {
    private String prefix;
    private String suffix;

    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    public String getSuffix() {
        return suffix;
    }

    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }

    pointcut doWriting() :
        execution(*
                com.spring.aop.MessageWriter.writeMessage());
    before() : doWriting() {
        System.out.println(prefix);
    }
    after() : doWriting() {
        System.out.println(suffix);
    }
}

<?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.xsd">
    <bean id="aspect" class="com.spring.aop.MessageWrapper"
          factory-method="aspectOf">
        <property name="prefix">
            <value>The Prefix</value>
        </property>
        <property name="suffix">
            <value>The Suffix</value>
        </property>
    </bean>
</beans>

package com.spring.aop;

import org.springframework.context.support.GenericXmlApplicationContext;

public class AspectJExample {
    public static void main(String[] args) {
        GenericXmlApplicationContext ctx = new GenericXmlApplicationContext();
        ctx.load(new String[]{"classpath:META-INF/spring/app-context-xml.xml"});
        ctx.refresh();

        MessageWriter writer = new MessageWriter();
        writer.writeMessage();
        writer.foo();
    }
}