mvn 单独构建子模块

-pl, --projects
        Build specified reactor projects instead of all projects
-am, --also-make
        If project list is specified, also build projects required by the list
-amd, --also-make-dependents
        If project list is specified, also build projects that depend on projects on the list

首先切换到工程的根目录，
单独构建模块 pingjuan-web，同时会构建 pingjuan-web 模块依赖的其他模块
$ mvn install -pl pingjuan-web -am

单独构建模块 pingjuan-common，同时构建依赖模块 pingjuan-common 的其他模块

$ mvn install -pl pingjuan-common -am -amd