maven 下载 源码和javadoc命令

1：Maven命令下载源码和javadocs

当在IDE中使用Maven时如果想要看引用的jar包中类的源码和javadoc需要通过maven命令下载这些源码，然后再进行引入，通过mvn命令能够容易的达到这个目的：

<code style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif"><span style="font-size:14px;"><span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">mvn dependency</span><span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">:</span><span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">sources
mvn dependency</span><span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">:</span><span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">resolve </span><span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">-</span><span class="typ" style="color:#2b91af;margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent;">Dclassifier</span><span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">=</span><span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent">javadoc</span></span></code>

命令使用方法：首先进入到相应的pom.xml目录中，然后执行以上命令：

第一个命令是尝试下载在pom.xml中依赖的文件的源代码。

第二个命令：是尝试下载对应的javadocs

但是有可能一些文件没有源代码或者javadocs

reference

2：通过配置文件添加

打开maven配置文件 setting.xml文件 (.../.m2/settings.xml) 增加如下配置：

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1. <profiles>  
2. <profile>  
3.     <id>downloadSources</id>  
4.     <properties>  
5.         <downloadSources>true</downloadSources>  
6.         <downloadJavadocs>true</downloadJavadocs>             
7.     </properties>  
8. </profile>  
9. </profiles>  
10.   
11. <activeProfiles>  
12.   <activeProfile>downloadSources</activeProfile>  
13. </activeProfiles>  

3：配置eclipse

Window > Preferences > Maven and checking the "Download Artifact Sources" and "Download Artifact JavaDoc" options