JsonPath实践(五)

书接上文和上上文:

  • JsonPath实践(一)
  • JsonPath实践(二)
  • JsonPath实践(三)
  • JsonPath实践(四)

今天分享的内容是JSonpath过滤数据的API。这部分API分成两类:一类是运算符,例如:==>=~这些,一类是方法或者函数,例如:inninanyof等等。

第一类实在没啥可分享的写法都是按照语言使用习惯,然后之前的文章也都介绍过了,下面主要分享一下方法函数的使用。

json数据

在原来的数据基础上增加了pagepages两个字段。

        JSONObject json = JSON.parseObject("{" +
                "    \"store\": {" +
                "        \"book\": [" +
                "            {" +
                "                \"category\": \"reference\"," +
                "                \"author\": \"Nigel Rees\"," +
                "                \"title\": \"Sayings of the Century\"," +
                "                \"page\": \"D\"," +
                "                \"pages\": [\"S\",\"X\",\"G\"]," +
                "                \"price\": 8.95" +
                "            }," +
                "            {" +
                "                \"category\": \"fiction\"," +
                "                \"author\": \"Evelyn Waugh\"," +
                "                \"title\": \"Sword of Honour\"," +
                "                \"page\": \"A\"," +
                "                \"pages\": [\"A\",\"B\"]," +
                "                \"price\": 12.99" +
                "            }," +
                "            {" +
                "                \"category\": \"fiction\"," +
                "                \"author\": \"Herman Melville\"," +
                "                \"title\": \"Moby Dick\"," +
                "                \"isbn\": \"0-553-21311-3\"," +
                "                \"page\": \"B\"," +
                "                \"pages\": [\"E\",\"F\"]," +
                "                \"price\": 8.99" +
                "            }," +
                "            {" +
                "                \"category\": \"fiction\"," +
                "                \"author\": \"J. R. R. Tolkien\"," +
                "                \"title\": \"The Lord of the Rings\"," +
                "                \"isbn\": \"0-395-19395-8\"," +
                "                \"page\": \"C\"," +
                "                \"pages\": [\"C\",\"D\"]," +
                "                \"price\": 22.99" +
                "            }" +
                "        ]," +
                "        \"bicycle\": {" +
                "            \"color\": \"red\"," +
                "            \"price\": 19.95" +
                "        }" +
                "    }," +
                "    \"expensive\": 10," +
                "    \"ss\": [32,32,4,23]" +
                "}");

字段值在某个数组中

这里的数组的写法跟语言一样。

jsonpath$.store.book[?(@.page in ['A','C'])]

代码:

        Object read = JsonPath.read(json, "$.store.book[?(@.page in ['A','C'])]");
        output(JSONArray.parseArray(read.toString()));

等效写法继续省略……

控制台输出:

INFO-> 当前用户:fv,IP:10.60.192.21,工作目录:/Users/fv/Documents/workspace/fun/,系统编码格式:UTF-8,系统Mac OS X版本:10.15.6
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "A",
>  ② . . . "B"
>  ① . ],
>  ① . "author":"Evelyn Waugh",
>  ① . "price":12.99,
>  ① . "page":"A",
>  ① . "category":"fiction",
>  ① . "title":"Sword of Honour"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "C",
>  ② . . . "D"
>  ① . ],
>  ① . "author":"J. R. R. Tolkien",
>  ① . "price":22.99,
>  ① . "isbn":"0-395-19395-8",
>  ① . "page":"C",
>  ① . "category":"fiction",
>  ① . "title":"The Lord of the Rings"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~

Process finished with exit code 0

字段值不在某个数组中

这个跟上面的一模一样,只是函数变成了nin,应该是no in的缩写吧。

jsonpath$.store.book[?(@.page nin ['A','C'])]

代码:

        Object read = JsonPath.read(json, "$.store.book[?(@.page nin ['A','C'])]");
        output(JSONArray.parseArray(read.toString()));

等效写法继续省略……

控制台输出:

INFO-> 当前用户:fv,IP:10.60.192.21,工作目录:/Users/fv/Documents/workspace/fun/,系统编码格式:UTF-8,系统Mac OS X版本:10.15.6
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "S",
>  ② . . . "X",
>  ② . . . "G"
>  ① . ],
>  ① . "author":"Nigel Rees",
>  ① . "price":8.95,
>  ① . "page":"D",
>  ① . "category":"reference",
>  ① . "title":"Sayings of the Century"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "E",
>  ② . . . "F"
>  ① . ],
>  ① . "author":"Herman Melville",
>  ① . "price":8.99,
>  ① . "isbn":"0-553-21311-3",
>  ① . "page":"B",
>  ① . "category":"fiction",
>  ① . "title":"Moby Dick"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~

Process finished with exit code 0


子集

这个校验的是数组之间的关系,value的值必需是数组才行,如果不是,会返回空值,但不会报错。

jsonpath$.store.book[?(@.pages subsetof ['A','B','C'])]

代码:

        Object read = JsonPath.read(json, "$.store.book[?(@.pages subsetof ['A','B','C'])]");
        output(JSONArray.parseArray(read.toString()));

等效写法继续省略……

控制台输出:

INFO-> 当前用户:fv,IP:10.60.192.21,工作目录:/Users/fv/Documents/workspace/fun/,系统编码格式:UTF-8,系统Mac OS X版本:10.15.6
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "A",
>  ② . . . "B"
>  ① . ],
>  ① . "author":"Evelyn Waugh",
>  ① . "price":12.99,
>  ① . "page":"A",
>  ① . "category":"fiction",
>  ① . "title":"Sword of Honour"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~

Process finished with exit code 0

数组之间的校验

国外的月亮也不一定是真的圆,这个据说在19年初被支持了,但是最后一个发行版本是在17年,已经三年没有发行版本了。我改天研究一下,自己弄个最新的版本版本吧。

属性值数量验证

size可以验证数组长度也可以验证字符串长度。

jsonpath$.store.book[?(@.pages size 3)]

字符串长度:

jsonpath$.store.book[?(@.author size 16)]

代码:

        Object read = JsonPath.read(json, "$.store.book[?(@.pages size 3)]");
        output(JSONArray.parseArray(read.toString()));
        Object read = JsonPath.read(json, "$.store.book[?(@.author size 16)]");
        output(JSONArray.parseArray(read.toString()));

等效写法继续省略……

控制台输出:

INFO-> 当前用户:fv,IP:10.60.192.21,工作目录:/Users/fv/Documents/workspace/fun/,系统编码格式:UTF-8,系统Mac OS X版本:10.15.6
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "S",
>  ② . . . "X",
>  ② . . . "G"
>  ① . ],
>  ① . "author":"Nigel Rees",
>  ① . "price":8.95,
>  ① . "page":"D",
>  ① . "category":"reference",
>  ① . "title":"Sayings of the Century"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~

Process finished with exit code 0


INFO-> 当前用户:fv,IP:10.60.192.21,工作目录:/Users/fv/Documents/workspace/fun/,系统编码格式:UTF-8,系统Mac OS X版本:10.15.6
INFO-> 
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~
>  {
>  ① . "pages":[
>  ② . . . "C",
>  ② . . . "D"
>  ① . ],
>  ① . "author":"J. R. R. Tolkien",
>  ① . "price":22.99,
>  ① . "isbn":"0-395-19395-8",
>  ① . "page":"C",
>  ① . "category":"fiction",
>  ① . "title":"The Lord of the Rings"
>  }
~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~ JSON ~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~~☢~

Process finished with exit code 0

为空判断

事实证明这也是一个坑,不过可以使用size 0这个API替换一下。


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