在eclise中运行bulid test出现一下错误报告是怎么回事？

Question

No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format : or :[:]:. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, v install, deploy, pre-site, site, post-site, site-deploy, pre-clean, clean, post-clean. -