Merge branch 'master' into 'main'

pipeline syntax modify9

See merge request !22

Jenkinsfile

@@ -9,6 +9,7 @@ pipeline {
             steps {
                 checkout scm
             }
+        }
         @post {
             success{
                 echo 'prepare success'
@@ -23,6 +24,7 @@ pipeline {
             }
         }
     }
+
     @stages('maven build'){
         @steps {
             sh  'mvn package'