Trying to read Json Message like below
{
"employees": [
{
"firstName": "John",
"lastName": "Doe"
},
{
"firstName": "Anna",
"lastName": "Smith"
},
{
"firstName": "Peter",
"lastName": "Jones"
}
]
}
I want to read all keynames like employees,firstName,lastName etc.. in java. in XML we do this while parsing we specify * in dom object and get all node names, how to do this in java?
Use org.json library.
Example:
import org.json.*;
String myJSONString = // put here your json object
JSONObject object = new JSONObject(myJSONString);
// get all the keys
String[] keys = JSONObject.getNames(object);
// iterate over them
for (String key : keys)
{
// retrieve the values
Object value = object.get(key);
// if you just have strings:
String value = (String) object.get(key);
}
This didnt seems to work anymore. However, Rickey pointed out another solution using iterators, which is mostly a smarter idea to use anyways:
JSONObject jsonObject = new JSONObject(contents.trim());
Iterator<String> keys = jsonObject.keys();
while(keys.hasNext()) {
String key = keys.next();
if (jsonObject.get(key) instanceof JSONObject) {
// do something with jsonObject here
}
}
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