使用 Javascript 从 textarea 解析 JSON 数据 [英] Parsing JSON data from textarea with Javascript
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问题描述
我正在尝试将 JSON 格式的数据放入文本区域，以便能够一次提取一份数据.目前我只是想将名称输出到 DIV.这是一个带有一个文本区域、一个按钮和 1 个 DIV 的静态 HTML 文件.我没有得到任何我不明白的输出.任何帮助将不胜感激.
I am trying to be able to drop JSON formatted data into a textarea to be able to pull out one piece of data at a time. Currently I am just trying to get the names output to a DIV. This is a static HTML file with one textarea, one button and 1 DIV. I am not getting any output which I do not understand. Any assistance would be greatly appreciated.
HTML
<!DOCTYPE html>
<html>
<head>
<script>
function parser(){
var results = document.getElementById("results");
var information = document.getElementById("TTP");
var data = JSON.parse("information");
results.innerHTML = "";
for(var obj in data){
results.innerHTML += data[obj].user+" is present +"<br />";
}
results.innerHTML = "requesting...";
}
</script>
</head>
<body>
<textarea id="TTP"></textarea>
<div id="results"></div>
<input type="button" onClick="parser()" value="Run"></input>
</body>
</html>
JSON 数据
{ "user":"John", "age":22, "country":"United States" },
{ "user":"Will", "age":27, "country":"United Kingdom" },
{ "user":"Abiel", "age":19, "country":"Mexico" },
{ "user":"Rick", "age":34, "country":"Panama" },
{ "user":"Susan", "age":23, "country":"Germany" },
{ "user":"Amy", "age":43, "country":"France" },
{ "user":"Pete", "age":18, "country":"Italy" },
{ "user":"Chris", "age":25, "country":"United States" },
{ "user":"Louis", "age":31, "country":"Spain" },
{ "user":"Emily", "age":38, "country":"Uraguay" },
{ "user":"Shawn", "age":52, "country":"Chile" },
{ "user":"Greg", "age":24, "country":"Romania" }
推荐答案
function parser(){
var results = document.getElementById("results");
var information = document.getElementById("TTP").value; // <-- 1
var data = JSON.parse(information); // <-- 2
results.innerHTML = "";
for(var obj in data){
results.innerHTML += data[obj].user+" is present <br>"; // <-- 3
}
//results.innerHTML = "requesting..."; // <-- 4
}<textarea id="TTP">[{ "user":"John", "age":22, "country":"United States" },
{ "user":"Will", "age":27, "country":"United Kingdom" },
{ "user":"Abiel", "age":19, "country":"Mexico" },
{ "user":"Rick", "age":34, "country":"Panama" },
{ "user":"Susan", "age":23, "country":"Germany" },
{ "user":"Amy", "age":43, "country":"France" },
{ "user":"Pete", "age":18, "country":"Italy" },
{ "user":"Chris", "age":25, "country":"United States" },
{ "user":"Louis", "age":31, "country":"Spain" },
{ "user":"Emily", "age":38, "country":"Uraguay" },
{ "user":"Shawn", "age":52, "country":"Chile" },
{ "user":"Greg", "age":24, "country":"Romania" }]</textarea>
<div id="results"></div>
<input type="button" onClick="parser()" value="Run"></input>变化:
document.getElementById()获取一个元素，你需要它的value"information"是一个字符串，information是你要解析的变量" is present +"不是正确的字符串
"- requesting..."字符串覆盖了结果，现在被注释了
- 你的 JSON 不是 JSON，它需要围绕
[]-s 成为一个列表
document.getElementById()gets an element, you need itsvalue"information"is a string,informationis the variable you want to parse" is present +"<br />"was not a correct string- The "requesting..." string overwrote the result, it is commented now
- Your JSON is not a JSON, it needs surrounding
[]-s to become a list
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