[英]Accessing Array using simple JSON parser java
I have JSON File as below: 我有JSON文件,如下所示:
{
"KerParameters": [
{
"cut": false,
"velocity": 0,
"sigma": 150,
"Tau": 250,
"deltaT": 30,
"deltaX": 100,
"minValue": 0.000001
},
{
"cut": false,
"velocity": 0,
"sigma": 150,
"Tau": 250,
"deltaX": 100,
"minValue": 0.000001
}
],
"time": false,
"lower": 1E-14,
"qualit": 1.0,
"vfth": 55.0,
"vjt": 30.0,
"lambf": 0.1,
"lambs": 0.6,
"lambdaj": 0.5,
"qRpic": 0.5,
"minV": 3.0,
"minKernelSizeT": 0
}
Could someone please let me know how do I get array of KerParameters ? 有人可以让我知道如何获取KerParameters数组吗? and then its subParameters (lamb,lambs etc.) using simple JSON parser ? 然后使用简单的JSON分析器对其子参数(lamb,lambs等)进行处理? I can already access other simple parameters like time,lower and all. 我已经可以访问其他简单的参数,例如时间,下限等等。
Well, I tried it like solution here How do I make a JSON object with multiple arrays? 好吧,我在这里像解决方案一样尝试过。 如何制作具有多个数组的JSON对象?
JSONParser parser = new JSONParser();
JSONObject data = (JSONObject) parser.parse(
new FileReader("src/test/resources/testcase4/KernelParameters.json"));
data.KerParameters['K1'].cut // This dos not work as it does not identify KerParameters
Ok So finally, I did it like this. 好了,最后,我做到了这一点。 Just in case it helps someone else: 以防万一它可以帮助其他人:
JSONParser parser = new JSONParser();
FileReader fr = new FileReader("path to json file");
JSONObject data = (JSONObject) parser.parse(fr);
JSONArray kernelParams = (JSONArray) data.get("KernelParameters");
for(int i=0; i<kernelParams.size();i++) {
JSONObject jsonObject = (JSONObject) kernelParams.get(i);
kparams.add(jsonObject);
}
JSONObject jo = (JSONObject) kparams.get(0);
System.out.println("to get Sigma for e.g.: " + jo.get("sigma"));
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