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我遇到問題使用json-simple解析json對象數組。使用Json-simple從文件中解析對象數組
假設以下report
對象數組:
[
{
"title": "Test Object 1",
"description": "complicated description...",
"products": null,
"formats": ["csv"]
},
{
"title": "Test Object 2",
"description": "foo bar baz",
"products": ["foo"],
"formats": ["csv", "pdf", "tsv", "txt", "xlsx"]
},
{
"title": "Test Object 3",
"description": "Lorem Ipsum stuff...",
"products": null,
"formats": ["pdf", "xlsx"]
}
]
在下面的代碼,從文件中讀取在後,如何能遍歷每個對象陣列中執行的操作?
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import java.io.FileNotFoundException;
import java.io.FileReader;
public class JsonReader {
public static void main(String[] args) {
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("sample.json"));
//convert object to JSONObject
JSONObject jsonObject = (JSONObject) obj;
//reading the string
String title = (String) jsonObject.get("title");
String description = (String) jsonObject.get("description");
//Reading an array
JSONArray products = (JSONArray) jsonObject.get("products");
JSONArray formats = (JSONArray) jsonObject.get("formats");
//Log values
System.out.println("title: " + title);
System.out.println("description: " + description);
if (products != null) {
for (Object product : products) {
System.out.println("\t" + product.toString());
}
} else {
System.out.println("no products");
}
if (formats != null) {
for (Object format : formats) {
System.out.println("\t" + format.toString());
}
} else {
System.out.println("no formats");
}
} catch (FileNotFoundException fe) {
fe.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
運行調試器,似乎jsonObject存儲數組,但我不知道如何去它。爲每個循環創建一個似乎不工作,因爲JSONObject不可迭代。
看樣子你想要解析的JSON是一個JSONArray,而不是一個JSONObject。如果有幫助。 – drelliot