方法：

Iterator iter = jsonInfo.entrySet().iterator();

代码示例：

public class Test {

public static void main(String[] args) {

JSONObject jsonInfo = new JSONObject();

String key1 = "a";

jsonInfo.put(key1, "aa");

String key2 = "b";

jsonInfo.put(key2, "bb");

Iterator iter = jsonInfo.entrySet().iterator();

while (iter.hasNext()) {

Map.Entry entry = (Map.Entry) iter.next();

System.out.println(entry.getKey().toString());

System.out.println(entry.getValue().toString());

}

}

}