java解析json，The constructor JSONObject(String) is undefined，错哪了啊？？

Posted 2023-03-27

///json-lib-2.4-jdk15.jar已导入
import net.sf.json.JSONArray;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;

public class Test

public static void main(String[] args) throws JSONException
String jsonString = "\"people\":[\"firstName\":\"Brett\",\"lastName\":\"McLaughlin\",\"email\":\"aaaa\",\"firstName\":\"Jason\",\"lastName\":\"Hunter\",\"email\":\"bbbb\",\"firstName\":\"Elliotte\",\"lastName\":\"Harold\",\"email\":\"cccc\"]";
JSONObject dataJson = new JSONObject(jsonString);
JSONArray array = dataJson.getJSONArray("people");

for (int i = 0; i < array.length(); i++)
System.out.println("array:" + array.get(i));
System.out.println("firstName:" + array.getJSONObject(i).get("firstName"));
System.out.println("lastName:" + array.getJSONObject(i).get("lastName"));
System.out.println("email:" + array.getJSONObject(i).get("email"));

import java.util.Iterator;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class Test6

public static void main(String[] args)

String str =
        "\\"people\\":[\\"firstName\\":\\"Brett\\",\\"lastName\\":\\"McLaughlin\\",\\"email\\":\\"aaaa\\",\\"firstName\\":\\"Jason\\",\\"lastName\\":\\"Hunter\\",\\"email\\":\\"bbbb\\",\\"firstName\\":\\"Elliotte\\",\\"lastName\\":\\"Harold\\",\\"email\\":\\"cccc\\"]";
JSONObject jo = JSONObject.fromString(str);
JSONArray info = jo.getJSONArray("people");
System.out.println(info);
for(int i = 0; i < info.length(); i++)

JSONObject obj = info.getJSONObject(i);
Iterator it = obj.keys();
while(it.hasNext())

String key = (String) it.next();
System.out.println(obj.get(key));

参考技术A net.sf.json.JSONObject这个类里面没有JSONObject(String)的初始化方法
所以不能那样初始化JSONObject实例