在 JsonPath 中，[<number> (, <number>)] 操作符用于获取数组中指定的多个索引位置的节点。假如存在如下 JSON：
{
"books": [{"title":"title1"}, {"title":"title2"}, {"title":"title3"}, {"title":"title4"}]
}如果使用“$.books[0,1]”JsonPath 表达式将返回 {"title":"title1"} 和 {"title":"title2"} 元素。
Java 示例：
package com.hxstrive.json_path.operators;
import com.jayway.jsonpath.JsonPath;
/**
* [index,index,...] 符号
* @author hxstrive.com
*/
public class OperatorsDemo07 {
public static void main(String[] args) {
String json = "{" +
" \"store\": {" +
" \"book\": [" +
" {" +
" \"category\": \"reference\"," +
" \"author\": \"Nigel Rees\"," +
" \"title\": \"Sayings of the Century\"," +
" \"price\": 8.95" +
" }," +
" {" +
" \"category\": \"fiction\"," +
" \"author\": \"Evelyn Waugh\"," +
" \"title\": \"Sword of Honour\"," +
" \"price\": 12.99" +
" }," +
" {" +
" \"category\": \"fiction\"," +
" \"author\": \"Herman Melville\"," +
" \"title\": \"Moby Dick\"," +
" \"isbn\": \"0-553-21311-3\"," +
" \"price\": 8.99" +
" }," +
" {" +
" \"category\": \"fiction\"," +
" \"author\": \"J. R. R. Tolkien\"," +
" \"title\": \"The Lord of the Rings\"," +
" \"isbn\": \"0-395-19395-8\"," +
" \"price\": 22.99" +
" }" +
" ]," +
" \"bicycle\": {" +
" \"color\": \"red\"," +
" \"price\": 19.95" +
" }" +
" }," +
" \"expensive\": 10" +
"}";
Object obj = JsonPath.read(json, "$.store.book[0,1]");
System.out.println(obj);
}
}运行示例，输出如下：
[{"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}]上述示例，将获取 JSON 中 book 中下标为 0 和 1 的书籍。
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