先把命令行切换到Maven项目的根目录，比如：/d/xxxwork/java/maven-test，然后执行命令：
mvn clean compile
执行结果如下：
[INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building rtp-front 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ rtp-front --- [INFO] Deleting D:xxxworkJavamaven-test arget [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ rtp-front --- [WARNING] Using platform encoding (GBK actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ rtp-front --- [INFO] Changes detected - recompiling the module! [WARNING] File encoding has not been set, using platform encoding GBK, i.e. build is platform dependent! [INFO] Compiling 13 source files to D:CtripWorkJavamaven-test argetclasses [WARNING] /D:/xxxwork/Java/maven-test/src/main/java/ReadOnly.java: 某些输入文件使用了未经检查或不安全的操作。 [WARNING] /D:/xxxwork/Java/maven-test/src/main/java/ReadOnly.java: 有关详细信息, 请使用 -Xlint:unchecked 重新编译。 [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 11.500 s [INFO] Finished at: 2016-11-14T15:15:13+08:00 [INFO] Final Memory: 13M/76M [INFO] ------------------------------------------------------------------------
执行顺序：
1、使用清理插件：maven-clean-plugin:2.5执行清理删除已有target目录（版本2.5）；
2、使用资源插件：maven-resources-plugin:2.6执行资源文件的复制等（版本2.6）；
3、使用编译插件：maven-compiler-plugin:3.1编译所有源文件生成class文件至targetclasses目录下（版本3.1）；
4、整个编译过程完成。