请求为VS Code添加AspectJ支持，适配Java/Spring Boot项目

Hey there! I totally get wanting to stick with VS Code instead of switching back to Eclipse or shelling out for IntelliJ Ultimate for your Java/Spring Boot + AspectJ project. Let's walk through how to get solid AspectJ support set up in VS Code step by step:

First, you'll need a couple of extensions to add AspectJ-specific functionality to VS Code:

• Language Support for Java by Red Hat: This is the foundation for Java development in VS Code—it powers basic Java tooling, which your AspectJ setup will rely on.
• Community AspectJ Extension: Head to the VS Code Marketplace and search for an AspectJ-focused extension (look for ones with recent updates and good user reviews). These add syntax highlighting, code completion, and basic linting for .aj files, filling the gap in VS Code's native support.

AspectJ requires compile-time weaving, so you need to update your build script to handle .aj files properly. Here's how for both major tools:

For Maven #

Add the AspectJ Maven plugin to your pom.xml to weave aspects during compilation:

<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>aspectj-maven-plugin</artifactId>
            <version>1.14.0</version>
            <executions>
                <execution>
                    <goals>
                        <goal>compile</goal>
                        <goal>test-compile</goal>
                    </goals>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>org.aspectj</groupId>
                    <artifactId>aspectjtools</artifactId>
                    <version>1.9.9.1</version>
                </dependency>
            </dependencies>
            <configuration>
                <source>17</source> <!-- Match your project's Java version -->
                <target>17</target>
                <complianceLevel>17</complianceLevel>
                <aspectLibraries>
                    <!-- Include Spring Aspects if you're using Spring AOP alongside AspectJ -->
                    <aspectLibrary>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-aspects</artifactId>
                    </aspectLibrary>
                </aspectLibraries>
            </configuration>
        </plugin>
    </plugins>
</build>

For Gradle #

Use the Freefair AspectJ plugin to integrate weaving into your Gradle build:

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.1.0'
    id 'io.spring.dependency-management' version '1.1.0'
    id 'io.freefair.aspectj' version '8.1.0'
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-aop'
    aspect 'org.springframework:spring-aspects'
    // Add your other project dependencies here
}

aspectj {
    version = '1.9.9.1'
    sourceCompatibility = JavaVersion.VERSION_17
    targetCompatibility = JavaVersion.VERSION_17
}

Make sure VS Code recognizes .aj files correctly by adjusting these settings:

• Open Settings (hit Ctrl+, or Cmd+, on Mac).
• Search for Files: Associations, then add a new entry:
  • Key: *.aj
  • Value: java
    This tells VS Code to treat AspectJ files as Java, so you get the benefits of native Java tooling alongside your AspectJ extension.

Debugging works with VS Code's standard Java debugger, but you need to ensure aspects are woven first:

• Run your build command (Maven: mvn clean compile, Gradle: ./gradlew compileJava) to weave aspects into your classes.
• Use the Spring Boot Dashboard extension or create a standard Java debug configuration to launch your app. Breakpoints in .aj files should trigger as expected once the woven classes are loaded.

• Community AspectJ extensions don't have all the advanced features of IntelliJ Ultimate or Eclipse (like full refactoring support), but they cover all the essentials for day-to-day development.
• Keep your AspectJ version consistent across your build plugin and dependencies to avoid compatibility headaches.
• If you hit weaving errors, double-check your build plugin configuration—most issues come from mismatched Java versions or missing aspect library declarations.

内容的提问来源于stack exchange，提问作者jcgarcia