Use of Jsonpath

Grammar:

JsonPath	Describe
$	Root node
@	Current node
. or[]	Child nodes
..	Select all nodes that meet the criteria
*	All nodes
[]	Iterator indicator, array subscript
[,]	Supports long selection in iterators
[Start:end:step]	Array Slice Operators
? ()	Support filtering operations
()	Supports expression evaluation

Required JAR Packages:

commons-lang-2.6. Jarjson-path-0.8. 1 . Jarjson-smart-1.1. 1. jar

For the following JSON, the use of Jsonpath is explained by an example

{"Store": {    " Book": [       { "category":"Reference",        "author":"Nigel Rees",        "title":"Sayings of the Century",        " Price":8.95      },      { "category":"Fiction",        "author":"Evelyn Waugh",        "title":"Sword of Honour",        " Price":12.99,        "ISBN":"0-553-21311-3"      }    ],    "Bicycle": {      "Color":"Red",      " Price":19.95    }  }}

Code:

private static void Jsonpathtest () {Jsonobject json = jsontest ();//Call the Custom Jsontest () method to get the JSON object, generating the above json//output BOOK[0] The author value of String author = jsonpath.read (JSON, "$.store.book[0].author");//output All author values, using iterator iteration list<string > authors = Jsonpath.read (JSON, "$.store.book[*].author");//output BOOK[*] category = = ' reference ' Booklist<object > books = Jsonpath.read (JSON, "$.store.book[?" ( @.category = = ' reference ')] [//output BOOK[*] price>10 booklist<object> books = Jsonpath.read (JSON, "$"). Store.book[? ( @.price>10)] [//Output BOOK[*] contains the ISBN element booklist<object> books = Jsonpath.read (JSON, "$.store.book[? ( @.isbn)];//output the value of all price in the JSON list<double> prices = Jsonpath.read (JSON, "$"). Price ");//You can edit a path in advance and use it multiple times JsonPath path = Jsonpath.compile (" $.store.book[*] "); list<object> books = Path.read (JSON);}