支持的方法清单如下：

方法 功能
compareVersions: Compare two version number strings
findFiles: Find files in the workspace
nodesByLabel: List of nodes by Label, by default excludes offline nodes.
readCSV: Read content from a CSV file in the workspace.
readJSON: Read JSON from files in the workspace.
readManifest: Read a Jar Manifest
readMavenPom: Read a maven project file.
readProperties: Read properties from files in the workspace or text.
readYaml: Read yaml from files in the workspace or text.
sha1: Compute the SHA1 of a given file
sha256: Compute the SHA256 of a given file
tee: Tee output to file
touch: Create a file (if not already exist) in the workspace, and set the timestamp
unzip: Extract Zip file
writeCSV: Write content to a CSV file in the workspace.
writeJSON: Write JSON to a file in the workspace.
writeMavenPom: Write a maven project file.
writeYaml: Write a yaml from an object or objects.
zip: Create Zip file

注意：要使用上述方法，首先需在Jenkins环境插件管理中，安装Pipeline Utility Steps插件

Pipeline Utility Steps-1-方法findFiles

Pipeline Utility Steps-2-方法readJSON和writeJSON

Pipeline Utility Steps-3-方法readProperties

Pipeline Utility Steps-4-方法readYaml和writeYaml

参考资料
官方

【Quality】 Quality is the value to someone who matters。做测试，首先要找到这个someone是谁，以及这个 someone重视的 value是什么。