xmllint (系統(tǒng)自帶的指令)

 如果您輸入的XML包含前綴的名稱空間颓芭，則必須使用local-name()代替name()嬉探。

CentOS

• 使用--xpath的時候會有問題，可以選擇--shell

#  xmllint --xpath "/" pom.xml 
Unknown option --xpath
Usage : xmllint [options] XMLfiles ...
    Parse the XML files and output the result of the parsing
    --version : display the version of the XML library used
    --debug : dump a debug tree of the in-memory document
......

• 使用--shell(CentOS和MacOS通用)

# xmllint --shell pom.xml 
/ > xpath //*[name() = 'project']/*[name() = 'version']/text()
Object is a Node Set :
Set contains 1 nodes:
1  TEXT
    content=1.1.5-SNAPSHOT
/ >

Mac

• 使用--xpath(在CentOS6.5中糜烹，由于libxml2的版本過低娶靡，所以無法直接使用--xpath)

okami$ xmllint --xpath "http://*[name() = 'project']/*[name() = 'version']/text()" pom.xml
1.1.5-SNAPSHOT

• 使用--shell

okami$ xmllint --shell pom.xml 
/ > xpath //*[name() = 'project']/*[name() = 'version']/text()
Object is a Node Set :
Set contains 1 nodes:
1  TEXT
    content=1.1.5-SNAPSHOT
/ >

xpath

xpath目前只發(fā)現(xiàn)可以在MacOS上使用茎芭，CentOS上暫時沒有找到該工具

• MacOS

okami$ xpath pom.xml "/project/version/text()"
Found 1 nodes:
-- NODE --
1.1.5-SNAPSHOT

xml2

• MacOs和CentOS的用法都一樣

okami$ cat pom.xml |xml2 |grep /project/version
/project/version=1.1.5-SNAPSHOT

xmlstarlet

安裝 xmlstarlet

• CentOS

# yum install xmlstarlet -y

• MacOS

okami$ brew install xmlstarlet
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 2 taps (homebrew/core and homebrew/cask).
==> Updated Formulae
bit             exploitdb       go@1.12         minikube        navi            pandoc          stress-ng       terrahub        unbound         wxmaxima
convox          gnome-autoar    mesa            msgpack         paket           powerline-go    sysbench        traefik         unrar

==> Downloading https://homebrew.bintray.com/bottles/xmlstarlet-1.6.1.mojave.bottle.tar.gz
######################################################################## 100.0%
==> Pouring xmlstarlet-1.6.1.mojave.bottle.tar.gz
??  /usr/local/Cellar/xmlstarlet/1.6.1: 15 files, 193.2KB

使用 xmlstarlet

# xmlstarlet sel -t -v  "http://*[name() = 'project']/*[name() = 'version']/text()" pom.xml
1.0-SNAPSHOT

參考鏈接

• https://www.jb51.net/article/125887.htm
• http://www.itkeyword.com/doc/1037095512571624x702/xmllint-and-xpath-to-parse-xml-data-from-https-mail-google-com-mail-feed-atom
• https://cloud.tencent.com/developer/ask/69968
• https://www.ibm.com/developerworks/cn/xml/x-starlet.html