JsonPath (JSON 解析神器)

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：

{ "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：

//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bookList<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authorList<Object> books1 = JsonPath.read(json, "$.store.book[?(@.category == 'reference')].author");System.out.println("books1\t"+books1);//输出book[*]中price>10的bookList<Object> b1 = JsonPath.read(json, "$.store.book[?(@.price>10)]");System.out.println("b1"+b1);//输出book[*]中含有isbn元素的bookList<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！