配置和运行maven-eclipse插件(例如从命令行mvn eclipse:eclipse)

   <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-eclipse-plugin</artifactId>
                <configuration>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>true</downloadJavadocs>
                </configuration>
            </plugin>
        </plugins>
    </build>

Maven Micro-Tip: Get sources and Javadocs When you're using Maven in an IDE you often find the need for your IDE to resolve source code and Javadocs for your library dependencies. There's an easy way to accomplish that goal. mvn dependency:sources mvn dependency:resolve -Dclassifier=javadoc The first command will attempt to download source code for each of the dependencies in your pom file. The second command will attempt to download the Javadocs. Maven is at the mercy of the library packagers here. So some of them won't have source code packaged and many of them won't have Javadocs. In case you have a lot of dependencies it might also be a good idea to use inclusions/exclusions to get specific artifacts, the following command will for example only download the sources for the dependency with a specific artifactId: mvn dependency:sources -DincludeArtifactIds=guava

来源:http://tedwise.com/2010/01/27/maven-micro-tip-get-sources-and-javadocs/

文档:https://maven.apache.org/plugins/maven-dependency-plugin/sources-mojo.html

为了调试，你也可以使用“Java反编译器”，如:JAD，并在运行中反编译源代码(尽管生成的源代码永远不会与原始源代码相同)。然后将JAD作为插件安装到Eclipse或您喜欢的IDE中。

在IntelliJ IDEA中，您可以在导入时通过打开“自动下载源”选项自动下载工件源:

设置→构建、执行、部署→构建工具→Maven→导入

如果您正在使用Eclipse，我建议同时下载源代码和第三方库的Javadocs。

右键点击项目和下载两个截图如下。

下载Javadocs意味着通常可以从第三方库中获得方法的上下文帮助，其中包含有用的参数描述等。如果你不太了解图书馆，这是很重要的。在某些情况下，我发现当源代码不可用时，Javadocs是可用的。

下载任何工件使用

mvn dependency:get -Dartifact=groupId:artifactId:version:packaging:classifier

对于Groovy源代码，这将是

mvn dependency:get -Dartifact=org.codehaus.groovy:groovy-all:2.4.6:jar:sources

对于Groovy的javadoc，您将使用

mvn dependency:get -Dartifact=org.codehaus.groovy:groovy-all:2.4.6:jar:javadoc

这将把给定的工件放到本地Maven存储库中，通常是$HOME/.m2/存储库。

Dependency:sources只下载项目依赖项的源代码，不下载插件源代码，也不下载插件内部定义的依赖项的源代码。