AspectJ在Maven项目中，不工作/编织

Question

I am trying get the AspectJ weaving working in a simple Maven project, and not sure where it is going wrong : when I run the code using "mvn exec:java", I dont see expected output. 我正在尝试让AspectJ编织在一个简单的Maven项目中工作，并且不确定它出错的地方：当我使用“mvn exec：java”运行代码时，我看不到预期的输出。

I am sure the code is working, because I tried the same in STS, where it works fine. 我确信代码工作正常，因为我在STS中尝试了相同的工作，它工作正常。 I just wanted to get the AspectJ working in a Maven project. 我只想让AspectJ在Maven项目中工作。

Any hints to how to debug this kind of issues will be much appreciated. 任何有关如何调试此类问题的提示将不胜感激。

<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.aop</groupId>
<artifactId>aop1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>aop1</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.7.3</version> <!-- specify your version -->
    </dependency>
</dependencies>

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.7</source>
                            <target>1.7</target>
                        </configuration>
                    </execution>
                </executions>
                <configuration>
                    <outxml>true</outxml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.1</version>
                <configuration>
                    <mainClass>com.aop.aop1.App</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

Aspect file in same folder as code : Aspect文件与代码位于同一文件夹中：

    package com.aop.aop1;


public aspect aspect {

    pointcut secureAccess()
        : execution(* *.foo(..));

    before() : secureAccess() {
        System.out.println("BEHOLD the power of AOP !!!");
    }
}

Java file : Java文件：

package com.aop.aop1;
public class App 
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
        foo();
    }
    public static void foo() {
        System.out.println(" IN FOO.");
    }
}

Answer 1

There are several problems with your configuration: 您的配置存在几个问题：

The aspect should be named Aspect with a capital "A" instead of aspect which is a reserved keyword. 该方面应该命名为Aspect ，使用大写“A”而不是aspect是保留关键字。
The POM is missing a closing </project> tag. POM缺少结束</project>标记。
The POM has a <pluginManagement> section, but no separate <plugins> section, ie you provide defaults for your plugins, but do not actually declare that you want to use them. POM有一个<pluginManagement>部分，但没有单独的<plugins>部分，即你为插件提供默认值，但实际上并没有声明你想要使用它们。 So either you use a stand-alone <plugins> section without <pluginManagement> or you redeclare the plugins in an additional <plugins> section. 因此，要么使用不带<pluginManagement>的独立<plugins>部分，要么在其他<plugins>部分重新声明插件。
The aspectj-maven-plugin needs a <version> . aspectj-maven-plugin需要<version> 。 You forgot to specify one. 你忘了指定一个。
The aspectj-maven-plugin also needs a <complianceLevel> configuration. aspectj-maven-plugin还需要<complianceLevel>配置。
You use compile-time weaving, so you do not need the <outxml> setting. 您使用编译时编织，因此您不需要<outxml>设置。 It is only needed for load-time weaving. 它只需要加载时间编织。
The aspectjrt dependency needs at least version 1.7.4 in order to be compatible with the version used in aspectj-maven-plugin 1.6 by default in order to compile your sources. aspectjrt依赖项至少需要1.7.4版本才能与aspectj-maven-plugin 1.6中使用的版本兼容，以便编译源代码。

In addition to that, I recommend to use newer versions of Maven plugins and dependencies such as JUnit and exec-maven-plugin if you do not have any compelling reasons to use older ones. 除此之外，如果您没有任何令人信服的理由使用旧版本，我建议使用较新版本的Maven插件和依赖项，如JUnit和exec-maven-plugin 。 I also recommend to use the latest AspectJ version 1.8.2 and also specify to use that one internally in aspectj-maven-plugin . 我还建议使用最新的AspectJ版本1.8.2，并指定在aspectj-maven-plugin内部使用它。

Working pom.xml with minimal changes: 使用最少的更改来处理pom.xml ：

<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.aop</groupId>
    <artifactId>aop1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>aop1</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.7.4</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <version>1.6</version>
                <configuration>
                    <complianceLevel>1.7</complianceLevel>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <source>1.7</source>
                            <target>1.7</target>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.1</version>
                <configuration>
                    <mainClass>com.aop.aop1.App</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Working pom.xml with recommended changes: 使用推荐的更改来处理pom.xml ：

<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.aop</groupId>
    <artifactId>aop1</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <name>AOP Sample</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <aspectj.version>1.8.2</aspectj.version>
        <java.source-target.version>1.7</java.source-target.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.source-target.version}</source>
                    <target>${java.source-target.version}</target>
                    <!-- IMPORTANT -->
                    <useIncrementalCompilation>false</useIncrementalCompilation>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <version>1.6</version>
                <configuration>
                    <showWeaveInfo>true</showWeaveInfo>
                    <source>${java.source-target.version}</source>
                    <target>${java.source-target.version}</target>
                    <Xlint>ignore</Xlint>
                    <complianceLevel>${java.source-target.version}</complianceLevel>
                    <encoding>UTF-8</encoding>
                    <verbose>true</verbose>
                </configuration>
                <executions>
                    <execution>
                        <!-- IMPORTANT -->
                        <phase>process-sources</phase>
                        <goals>
                            <goal>compile</goal>
                            <goal>test-compile</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.aspectj</groupId>
                        <artifactId>aspectjtools</artifactId>
                        <version>${aspectj.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.3</version>
                <configuration>
                    <mainClass>com.aop.aop1.App</mainClass>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.dstovall</groupId>
                <artifactId>onejar-maven-plugin</artifactId>
                <version>1.4.4</version>
                <executions>
                    <execution>
                        <configuration>
                            <onejarVersion>0.96</onejarVersion>
                            <mainClass>com.aop.aop1.App</mainClass>
                            <attachToBuild>true</attachToBuild>
                        </configuration>
                        <goals>
                            <goal>one-jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <pluginRepositories>
        <pluginRepository>
            <id>OneJAR googlecode.com</id>
            <url>http://onejar-maven-plugin.googlecode.com/svn/mavenrepo</url>
        </pluginRepository>
    </pluginRepositories>

    <dependencies>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${aspectj.version}</version>
            <!--<scope>runtime</scope>-->
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

BTW, the onejar-maven-plugin is just a goodie which I like to use in order to build a stand-alone uber JAR (aka fat JAR) containing everything you need to run the software, ie your classes/aspects plus the AspectJ runtime. 顺便说一句， onejar-maven-plugin只是一个好东西，我喜欢用它来构建一个独立的超级JAR（又名胖JAR），其中包含运行软件所需的一切，即你的类/方面加上AspectJ运行时。 You can just run the program with 你可以用它来运行程序

java -jar aop1-0.0.1-SNAPSHOT.one-jar.jar

The output should be similar to mvn exec:java just without the Maven stuff: 输出应该类似于mvn exec:java只是没有Maven的东西：

Hello World!
BEHOLD the power of AOP !!!
IN FOO.

AspectJ在Maven项目中，不工作/编织

问题描述

1 个解决方案

解决方案1
13 已采纳 2014-08-25 06:50:08

AspectJ在Maven项目中，不工作/编织

问题描述

1 个解决方案

解决方案1 13 已采纳 2014-08-25 06:50:08

解决方案1
13 已采纳 2014-08-25 06:50:08