Shulou(Shulou.com)06/03 Report--

The role of xPath is to select the path of the node in the xml file.

(1) the convention of path expression

"/" indicates a partial separator within the path

There are two ways to write the same node: absolute path and relative path

Absolute paths must start with "/", while relative paths must not start with "/"

"." Represents the current node

".." Represents the parent node of the current node

(2) basic rules for selecting nodes

Nodename: indicates that all child nodes are selected

/: indicates that the root node is selected

/ /: means to select a node at any location

@: indicates that an attribute is selected

(3) predicate condition

These are the additional conditions added to the path expression, all of which are added to [] to indicate further filtering of the node.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.