JsonPath —— JSON 解析神器

真乃神器也,再复杂的 Json 都能给你解析出来,非常方便的获取 JSON 的内容,很强大!

语法简介

JsonPath 描述
$ 根节点
@ 当前节点
.or[] 子节点
.. 选择所有符合条件的节点
* 所有节点
[] 迭代器标示,如数组下标
[,] 支持迭代器中做多选
[start:end:step] 数组切片运算符
?() 支持过滤操作
() 支持表达式计算

JSON 值:

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{ "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
}
}
}

导包:import com.jayway.jsonpath.JsonPath

解析代码:

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//输出book[0]的author值
String author = JsonPath.read(json, "$.store.book[0].author");
System.out.println("author\t"+author);
//输出全部author的值,使用Iterator迭代
List<String> authors = JsonPath.read(json, "$.store.book[*].author");
System.out.println("authors\t"+authors);

//输出book[*]中category == 'reference'的book
List<Object> books = JsonPath.read(json, "$.store.book[?(@.category == 'reference')]");
System.out.println("books\t"+books);
//输出book[*]中category == 'reference'的book或者
List<Object> books2 = JsonPath.read(json, "$.store.book[?(@.category == 'reference' || @.price>10)]");
System.out.println("books2\t"+books2);

//输出book[*]中category == 'reference'的book的author
List<Object> books1 = JsonPath.read(json, "$.store.book[?(@.category == 'reference')].author");
System.out.println("books1\t"+books1);

//输出book[*]中price>10的book
List<Object> b1 = JsonPath.read(json, "$.store.book[?(@.price>10)]");
System.out.println("b1"+b1);

//输出book[*]中含有isbn元素的book
List<Object> b2 = JsonPath.read(json, "$.store.book[?(@.isbn)]");
System.out.println("b2"+b2);

//输出该json中所有price的值
List<Double> prices = JsonPath.read(json, "$..price");
System.out.println("prices"+prices);

//输出该json中所有title的值
List<Double> title = JsonPath.read(json, "$..title");
System.out.println("title"+title);
//输出该json中book 0,1的值
List<Double> book01 = JsonPath.read(json, "$..book[0,1]");
System.out.println("book01"+book01);
/* //输出该json中book 0,1的值
List<Double> book012 = JsonPath.read(json, "$..book[-2:]");
System.out.println("book012"+book012);*/

//可以提前编辑一个路径,并多次使用它
JsonPath path = JsonPath.compile("$.store.book[*]");
List<Object> b3 = path.read(json);
System.out.println("path\t"+path+"\n"+b3);

用法比较简单,多使用几次就会使用了!文章主要参考网上!原谅很多天不跟博的我现在竟然这样水了这么一篇文章,哈哈!实在是忙!

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