Question

我的项目：

src/main/aspects：

com
 |---badmitrii
        |---Trace.aj

src/main/java：

com
 |---badmitrii
        |---App.java

我写了以下pom：

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.badmitrii</groupId>
    <artifactId>aspectj-test</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>aspectj-test</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.11</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <configuration>
                    <aspectLibraries>
                        <aspectLibrary>
                            <groupId>com.badmitrii</groupId>
                            <artifactId>aspectj-test</artifactId>
                        </aspectLibrary>
                    </aspectLibraries>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>java</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <mainClass>com.badmitrii.App</mainClass>
                </configuration>
            </plugin>
            <plugin>
                <!-- Build an executable JAR -->
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>lib/</classpathPrefix>
                            <mainClass>com.badmitrii.App</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

但是jar仍然被编译为java项目，当我用java -jar <jar-name>运行它时，我没有得到理想的aspectJ结果。

如何告诉maven根据方面编译jar？

UPD：

App.java：

包com.badmitrii;

public class App 
{
    public static void main( String[] args )
    {
        App  a = new App ();
        a.m();
    }

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

Trace.aj：

package com.badmitrii.aspects;

public aspect Trace {
    pointcut publicMethodExecuted(): execution(public !static * *(..));

    after(): publicMethodExecuted() {
        System.out.printf("Enters on method: %s. \n", thisJoinPoint.getSignature());

        Object[] arguments = thisJoinPoint.getArgs();
        for (int i =0; i < arguments.length; i++){
            Object argument = arguments[i];
            if (argument != null){
                System.out.printf("With argument of type %s and value %s. \n", argument.getClass().toString(), argument);
            }
        }
        System.out.printf("Exits method: %s. \n", thisJoinPoint.getSignature());
    }
}

Answer 1

尝试配置插件the documentation描述：

为了将已编译的方面应用于您自己的来源需要设置你想在插件中编织的所有JAR文件配置如下图所示。

将是

       <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>aspectj-maven-plugin</artifactId>
            <configuration>
                <aspectLibraries>
                    <aspectLibrary>
                        <groupId>com.badmitrii</groupId>
                        <artifactId>aspectj-test</artifactId>
                    </aspectLibrary>
                </aspectLibraries>
            </configuration>
           <executions>
             <execution>
               <goals>
                 <goal>compile</goal>
               </goals>
             </execution>
           </executions>
        </plugin>

代码发布后更新：

但是，你的不是预先编译的方面。因此，您不需要配置aspectLibraries，您只需要目标：

       <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>aspectj-maven-plugin</artifactId>
           <executions>
             <execution>
               <goals>
                 <goal>compile</goal>
               </goals>
             </execution>
           </executions>
        </plugin>

此外，您应该添加maven-plugin的版本：

<artifactId>aspectj-maven-plugin</artifactId>
<version>1.7</version>

如果你注释掉printf行（它们没有正确写入，它们超出了这个问题的范围），这将编译你的方面。您可以在方面内部使用System.out.println（“我在方面内部”）测试它，看它是否有效。

像：

package com.badmitrii.aspects;

public aspect Trace {
    pointcut publicMethodExecuted(): execution(public !static * *(..));

    after(): publicMethodExecuted() {
//        System.out.printf("Enters on method: %s. \n", thisJoinPoint.getSignature());
        System.out.println("inside the aspect - after");
        Object[] arguments = thisJoinPoint.getArgs();
        for (int i =0; i < arguments.length; i++){
            Object argument = arguments[i];
            if (argument != null){
//                System.out.printf("With argument of type %s and value %s. \n", argument.getClass().toString(), argument);
            }
        }
//        System.out.printf("Exits method: %s. \n", thisJoinPoint.getSignature());
    }
}

如何告诉maven将项目编译为aspectj项目

1 个答案: