Javascript JSON.parse返回错误_Javascript_Json_Angular_Typescript

Javascript JSON.parse返回错误

javascript json angular typescript

Javascript JSON.parse返回错误,javascript,json,angular,typescript,Javascript,Json,Angular,Typescript,这是我的JSON.stringify在我尝试运行JSON.parse之前返回的 {"id":"2","name":"<small>L</small>(+)-Amethopterin Hydrate","class":"6.1","subclass":"","packing_group":"III","un":"2811","cas":"133073-73-1","poisons":"","hazardous":"Yes","restricted":"No","epa":"

这是我的JSON.stringify在我尝试运行JSON.parse之前返回的

{"id":"2","name":"<small>L</small>(+)-Amethopterin Hydrate","class":"6.1","subclass":"","packing_group":"III","un":"2811","cas":"133073-73-1","poisons":"","hazardous":"Yes","restricted":"No","epa":"","added_by":"0","carcinogen":null},
{"id":"3","name":"(+)-Biotin 4-Nitrophenyl ester","class":"","subclass":"","packing_group":"","un":"","cas":"33755-53-2","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null},
{"id":"4","name":"(+)-Biotin N-hydroxysuccinimide ester","class":"","subclass":"","packing_group":"","un":"","cas":"35013-72-0","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null}

this.searchService.searchJson（this.php\u url）

基本上就是我的JSON字符串。给出如上所述的错误

JSON.parse(this.searchService.searchJson(this.php_url));

另外，如果我只是尝试对3个元素中的1个进行字符串化，它将在位置0处提供JSON中意外的标记u

调用函数：

searchJson(url: any): any 
{   
    let items: any = []; 
    let new_data: any = []; 
    $.getJSON(url , 
        function(data)
        {   
            let temp_items: any = {}; 
            console.log(data);
            $.each(data, function (key, val)
            {   
                new_data.push(JSON.stringify(val));
            }); 
        }); 
    return new_data;
}

您必须用

[]

来包装它，因为这是一个对象数组：

const data = [{"id":"2","name":"<small>L</small>(+)-Amethopterin Hydrate","class":"6.1","subclass":"","packing_group":"III","un":"2811","cas":"133073-73-1","poisons":"","hazardous":"Yes","restricted":"No","epa":"","added_by":"0","carcinogen":null}, {"id":"3","name":"(+)-Biotin 4-Nitrophenyl ester","class":"","subclass":"","packing_group":"","un":"","cas":"33755-53-2","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null}, {"id":"4","name":"(+)-Biotin N-hydroxysuccinimide ester","class":"","subclass":"","packing_group":"","un":"","cas":"35013-72-0","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null}]

JSON.parse（data）

也将返回

[Object，Object，Object]

您必须用

[]

包装它，因为这是一个对象数组：

const data = [{"id":"2","name":"<small>L</small>(+)-Amethopterin Hydrate","class":"6.1","subclass":"","packing_group":"III","un":"2811","cas":"133073-73-1","poisons":"","hazardous":"Yes","restricted":"No","epa":"","added_by":"0","carcinogen":null}, {"id":"3","name":"(+)-Biotin 4-Nitrophenyl ester","class":"","subclass":"","packing_group":"","un":"","cas":"33755-53-2","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null}, {"id":"4","name":"(+)-Biotin N-hydroxysuccinimide ester","class":"","subclass":"","packing_group":"","un":"","cas":"35013-72-0","poisons":"","hazardous":"No","restricted":"No","epa":"","added_by":"0","carcinogen":null}]

JSON.parse（data）

也将返回

[Object，Object，Object]

将调用函数更改为：

searchAjax(url: any): any
{   
    let new_data: any;
    return $.ajax({
        url: url,
        type: 'post',
        dataType: "json", 
        async: false

    }).responseText;
}

最有可能的原因是我的变量是，由于异步，我的变量在被调用时为空。

将调用函数更改为：

searchAjax(url: any): any
{   
    let new_data: any;
    return $.ajax({
        url: url,
        type: 'post',
        dataType: "json", 
        async: false

    }).responseText;
}

file Nmae: self.json
    [
          {
            "id": "2",
            "name": "<small>L</small>(+)-Amethopterin Hydrate",
            "class": "6.1",
            "subclass": "",
            "packing_group": "III",
            "un": "2811",
            "cas": "133073-73-1",
            "poisons": "",
            "hazardous": "Yes",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          },
          {
            "id": "3",
            "name": "(+)-Biotin 4-Nitrophenyl ester",
            "class": "",
            "subclass": "",
            "packing_group": "",
            "un": "",
            "cas": "33755-53-2",
            "poisons": "",
            "hazardous": "No",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          },
          {
            "id": "4",
            "name": "(+)-Biotin N-hydroxysuccinimide ester",
            "class": "",
            "subclass": "",
            "packing_group": "",
            "un": "",
            "cas": "35013-72-0",
            "poisons": "",
            "hazardous": "No",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          }
        ]
     $(document).ready(function($) {
            $.ajax({
                url: 'self.json',
                type: 'GET',
                dataType: 'json',
            })
            .done(function(respose) {
                for (var i = 0; i < respose.length; i++) {
                    resText = respose[i].id+' '+respose[i].name+' '+ respose[i].class+' '+respose[i].subclass;
                    console.log(resText);
                };
            })
            .fail(function() {
                console.log("error");
            })
            .always(function() {
                console.log("complete");
            });

        });

最有可能的原因是，我的变量在被调用时由于异步而为null。

文件Nmae:self.json
file Nmae: self.json
    [
          {
            "id": "2",
            "name": "<small>L</small>(+)-Amethopterin Hydrate",
            "class": "6.1",
            "subclass": "",
            "packing_group": "III",
            "un": "2811",
            "cas": "133073-73-1",
            "poisons": "",
            "hazardous": "Yes",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          },
          {
            "id": "3",
            "name": "(+)-Biotin 4-Nitrophenyl ester",
            "class": "",
            "subclass": "",
            "packing_group": "",
            "un": "",
            "cas": "33755-53-2",
            "poisons": "",
            "hazardous": "No",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          },
          {
            "id": "4",
            "name": "(+)-Biotin N-hydroxysuccinimide ester",
            "class": "",
            "subclass": "",
            "packing_group": "",
            "un": "",
            "cas": "35013-72-0",
            "poisons": "",
            "hazardous": "No",
            "restricted": "No",
            "epa": "",
            "added_by": "0",
            "carcinogen": null
          }
        ]
     $(document).ready(function($) {
            $.ajax({
                url: 'self.json',
                type: 'GET',
                dataType: 'json',
            })
            .done(function(respose) {
                for (var i = 0; i < respose.length; i++) {
                    resText = respose[i].id+' '+respose[i].name+' '+ respose[i].class+' '+respose[i].subclass;
                    console.log(resText);
                };
            })
            .fail(function() {
                console.log("error");
            })
            .always(function() {
                console.log("complete");
            });

        });

[
{
“id”：“2”，
“名称”：“L（+）-水合氨甲蝶呤”，
“类别”：“6.1”，
“子类”：“，
“包装组”：“III”，
“联合国”：“2811”，
“cas”：“133073-73-1”，
“毒药”：“，
“危险”：“是”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
},
{
“id”：“3”，
“名称”：“（+）-生物素4-硝基苯酯”，
“类别”：“，
“子类”：“，
“包装类别”：“，
“联合国”：“，
“cas”：“33755-53-2”，
“毒药”：“，
“危险”：“否”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
},
{
“id”：“4”，
“名称”：“（+）-生物素N-羟基琥珀酰亚胺酯”，
“类别”：“，
“子类”：“，
“包装类别”：“，
“联合国”：“，
“cas”：“35013-72-0”，
“毒药”：“，
“危险”：“否”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
}
]
$（文档）.ready（函数（$）{
$.ajax({
url:'self.json'，
键入：“GET”，
数据类型：“json”，
})
.完成（功能（响应）{
对于（变量i=0；i


输出：
文件Nmae:self.json
[
{
“id”：“2”，
“名称”：“L（+）-水合氨甲蝶呤”，
“类别”：“6.1”，
“子类”：“，
“包装组”：“III”，
“联合国”：“2811”，
“cas”：“133073-73-1”，
“毒药”：“，
“危险”：“是”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
},
{
“id”：“3”，
“名称”：“（+）-生物素4-硝基苯酯”，
“类别”：“，
“子类”：“，
“包装类别”：“，
“联合国”：“，
“cas”：“33755-53-2”，
“毒药”：“，
“危险”：“否”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
},
{
“id”：“4”，
“名称”：“（+）-生物素N-羟基琥珀酰亚胺酯”，
“类别”：“，
“子类”：“，
“包装类别”：“，
“联合国”：“，
“cas”：“35013-72-0”，
“毒药”：“，
“危险”：“否”，
“受限”：“否”，
“环境保护局”：“，
“添加人”：“0”，
“致癌物”：无效
}
]
$（文档）.ready（函数（$）{
$.ajax({
url:'self.json'，
键入：“GET”，
数据类型：“json”，
})
.完成（功能（响应）{
对于（变量i=0；i

输出：
介意给我们看一下解析代码吗？@TheLazySloth更新了它。返回的基本上是一个字符串化的数组，即3个用逗号写的对象。。它应该是一个数组或其他东西。。在JSONLint.com上输入JSON，它显示了一个错误。将其添加到[]中，错误消失。试一试？@echonax事情是。。。我很确定它们在一个数组中，我会用我的调用函数Mind向我们展示解析代码吗？@TheLazySloth更新了它。返回的基本上是一个字符串化的数组，即3个用逗号写的对象。。它应该是一个数组或其他东西。。在JSONLint.com上输入JSON，它显示了一个错误。将其添加到[]中，错误消失。试一试？@echonax事情是。。。我很确定它们在一个数组中，当我控制台.log（data）返回我时，我将使用调用函数更新它[Object{id=“2”，…]，Object{id=“3”，name=“（+）-Biotin 4-Nitroph