如何在 JSON 对象中搜索特定的字符串值？答案

【问题标题】：How do I search a JSON object for a specific string value?如何在 JSON 对象中搜索特定的字符串值？
【发布时间】：2016-12-14 01:08:54
【问题描述】：

我想搜索一个 JSON 对象以检查它是否包含存储在数组中的字符串值。并找出父元素。

var searchVal = ['name_1a','name_2y','name_3x'];

var json = {
"location": {
        "title1x": {
            "1": "name_1x",
            "2": "name_2x",
            "3": "name_3x",
        },
       "title2y": {
            "1": "name_1y",
            "2": "name_2y",
            "3": "name_3y",
        },
    }

    "object": {
        "title1a": {
            "1": "name_1z",
            "2": "name_2z",
            "3": "name_3z",
        },
       "title2b": {
            "1": "name_1a",
            "2": "name_2a",
            "3": "name_3a",
        },
    }
};

我想将结果传递给函数。并分别处理。

name_1a -> function(title2b, object)
name_2y -> function(title2y, object)
name_3x -> function(title1x, location) etc.

。这是我到目前为止所尝试的。我似乎无法弄清楚如何通过整个 JSON 对象

var searchVal = ['name_1a','name_2y','name_3x'];
  for (var i=0 ; i < searchVal.length ; i++){
    for (var k=0 ; k < ????.length ; k++)
    {
      if (json.???????? == searchVal[i]) {
        results.push(???????);
        console.log(results);

      }
    }
  }

【问题讨论】：

json 语法不正确
你需要做一个递归函数
您能给我们提供与您提供的输入相对应的预期输出
搜索到的字符串是一直在第三层还是可以更深
@kevinternet 第三级。结果应该传递给函数

标签： javascript html arrays json

【解决方案1】：

使用下面的代码，您可以递归地找到您要查找的内容：

var json = {
    "location": {
        "title1x": {
            "1": "name_1x",
            "2": "name_2x",
            "3": "name_3x",
        },
       "title2y": {
            "1": "name_1y",
            "2": "name_2y",
            "3": "name_3y",
        },
    },
    "object": {
        "title1a": {
            "1": "name_1z",
            "2": "name_2z",
            "3": "name_3z",
        },
       "title2b": {
            "1": "name_1a",
            "2": "name_2a",
            "3": "name_3a",
        },
    }
};

var searchTest = function(varToSearch, jsonData) {

    for (var key in jsonData) {
        if(typeof(jsonData[key]) === 'object') {
            searchTest(varToSearch, jsonData[key]);
        } else {
            if(jsonData[key] == varToSearch) {
                console.log(jsonData[key]);
            }
        }
    }

}

searchTest('name_1a', json);

参考：

get data from dynamic key value in json

get value from json with dynamic key

https://trinitytuts.com/tips/get-dynamic-keys-from-json-data/

How do I enumerate the properties of a JavaScript object?

Check if a value is an object in JavaScript

【讨论】：

【解决方案2】：

这样的事情怎么样：

var json = {
  "location": {
    "title1x": {
      "1": "name_1x",
      "2": "name_2x",
      "3": "name_3x",
    },
    "title2y": {
      "1": "name_1y",
      "2": "name_2y",
      "3": "name_3y",
    },
  },
  "object": {
    "title1a": {
      "1": "name_1z",
      "2": "name_2z",
      "3": "name_3z",
    },
    "title2b": {
      "1": "name_1a",
      "2": "name_2a",
      "3": "name_3a",
      "foo": [{
        "x": "aaa",
        "y": "bbb",
        "z": {
          "k": "name_3y"
        }
      }, {
        "x": "aaa",
        "y": "bbb",
        "z": {
          "k": "name_3y",
          "bar": [{
            "op": "test",
            "fooAgain": {
              "x": "name_3y"
            }
          }]
        }
      }]
    },
  }
};

function search(what, where) {

  var results = [];
  var parentStack = [];

  var searchR = function(what, where) {

    if (typeof where == "object") {
      parentStack.push(where);
      for (key in where) {
        searchR(what, where[key]);
      };
      parentStack.pop();
    } else {
      // here comes your search
      if (what === where) {
        results.push({
          parent: parentStack[parentStack.length - 1],
          value: where
        });
      }
    }

  }

  searchR(what, where);

  return results;

}

search("name_3y", json).forEach(function(value, key) {

  var out = "parent: \n";

  for (key in value.parent) {
    out += "    key: " + key + " - value: " + value.parent[key] + "\n";
  }

  out += "\nvalue: " + value.value;

  alert(out);

});

搜索功能将在 json 对象中搜索完全相等的值。例如，您可以使用它来搜索数组的每个元素，只需调整代码即可。堆栈是必要的，因为我们需要跟踪父母。我修改了您的 json 以插入更多级别。结果的值是具有两个属性的对象。我认为有了这个你可以做你需要的。当然，您可以修改我的代码以在搜索中使用正则表达式而不是字符串。它会更强大。

【讨论】：

【解决方案3】：

var searchVal = ['name_1a','name_2y','name_3x'];

var json = {
"location": {
        "title1x": {
            "1": "name_1x",
            "2": "name_2x",
            "3": "name_3x",
        },
       "title2y": {
            "1": "name_1y",
            "2": "name_2y",
            "3": "name_3y",
        }
    },

    "object": {
        "title1a": {
            "1": "name_1z",
            "2": "name_2z",
            "3": "name_3z",
        },
       "title2b": {
            "1": "name_1a",
            "2": "name_2a",
            "3": "name_3a",
        }
    }
};
var getTitle=function(json,val){
  for (var key in json) {
    var titles= json[key];
    for (var tit in titles) {
      var names=titles[tit];
      for (var name in names) {
        var string=names[name];
        if(string===val)
          return tit;
      }
    }
}
}

searchVal.forEach(function(valToSearch){
   console.log(getTitle(json,valToSearch));
});

【讨论】：