Spring 一二事（10） - annotation AOP

先贴出POM的内容，这个毕竟是用的maven来简单构建的

<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>org.springframework.samples</groupId>
  <artifactId>maven-spring002-aop</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <properties>

        <!-- Generic properties -->
        <java.version>1.7</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <!-- Spring -->
        <spring-framework.version>3.2.3.RELEASE</spring-framework.version>

        <!-- Logging -->
        <logback.version>1.0.13</logback.version>
        <slf4j.version>1.7.7</slf4j.version>

        <!-- Test -->
        <junit.version>4.11</junit.version>

        <!-- aspectj -->
<!--         <aspectj.version>1.8.7</aspectj.version> -->
        <aspectj.version>1.6.6</aspectj.version>

    </properties>

    <dependencies>
        <!-- Spring and Transactions -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring-framework.version}</version>
        </dependency>

        <!-- Logging with SLF4J & LogBack -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
            <scope>runtime</scope>
        </dependency>

        <!-- Test Artifacts -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring-framework.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectj.version}</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build> 

</project>

关于AOP的配置，我个人还是喜欢用XML来配置，一来方便管理，看的清楚，一个项目的aop也不会太多，二来注解形式的不好管理

applicationContext.xml的话只要有2行就行

1 　  <context:component-scan base-package="com.lee.spring003.aop.annotation"></context:component-scan>
2     
3     <!-- 自动创建代理 -->
4     <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

ITeacherDAO.java

1 package com.lee.spring003.aop.annotation;
2 
3 public interface ITeacherDAO {
4     public String saveTeacher();
5 }

TeacherDAOImpl.java

package com.lee.spring003.aop.annotation;

import org.springframework.stereotype.Repository;

@Repository("teacherDAO")
public class TeacherDAOImpl implements ITeacherDAO {

    @Override
    public String saveTeacher() {
        System.out.println("TeacherDAOImpl - saveTeacher()");
        return "save successfully";
    }

}

Transaction.java

package com.lee.spring003.aop.annotation;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Component("transaction")
@Aspect
public class Transaction {

    @Pointcut("execution(* com.lee.spring003.aop.annotation.TeacherDAOImpl.*(..))")
    public void beginTransactionPointCut() {    // 方法签名
    };

    @Before("beginTransactionPointCut()")
    public void beginTransaction() {
        System.out.println("Begin transaction...");
    }

    @AfterReturning("beginTransactionPointCut()")
    public void commit() {
        System.out.println("Transaction commit...");
    } 

}