Reference from: https: //www.cnblogs.com/loveapple/p/9852456.html
Parameter Description:
Variable names: variable name stored later with reference $ {Variable names}
JSON Path expressions: the previous step through debugging json path expression
Match Numbers: matching digits (0 represents a random, 1 for the first, -1 for all)
Default Values: can not find the default value is usually set to NOT FOUND
Compute concatenation var (suffix_ALL): whether to count all upcoming matches to save all values, called "variable name _ALL", usage scenarios need to get multiple values are behind the need for the operation of this set of data.
JSON PATH EXPRESSION syntax:
| JsonPath |
description |
| $ |
Root |
| @ |
The current node |
| .or[] |
Child node |
| .. |
Select all eligible node |
| * |
All nodes |
| [] |
Iterator mark, such as an array subscript |
| [,] |
Support iterator do multiple choice |
| [start:end:step] |
Array slice operator |
| ?() |
Support filtering |
| () |
Support for expression evaluation |
Expressions debugging techniques:
It can result in the tree, debugging through JSON PATH TESTER