【发布时间】：2019-08-11 23:02:08
【问题描述】：
我能够使用我的 get 请求方法从 api 中提取数据
{"vulnerabilities":[{"id":5027994,"status":"open","closed_at":null,"created_at":"2019-06-07T06:10:15Z","due_date":null,"notes":null,"port":[],"priority":null,"identifiers":["adobe-reader-apsb09-15-cve-2009-2990"],"last_seen_time":"2019-07-24T05:00:00.000Z","fix_id":4953,"scanner_vulnerabilities":[{"port":null,"external_unique_id":"adobe-reader-apsb09-15-cve-2009-2990","open":true}],"asset_id":119920,"connectors":[{"name":"Nexpose Enterprise","id":7,"connector_definition_name":"Nexpose Enterprise","vendor":"R7"}],"service_ticket":null,"urls":{"asset":"dummy.com"},"patch":true,"patch_published_at":"2009-10-08T22:40:52.000Z","cve_id":"CVE-2009-2990","cve_description":"Array index error in Adobe Reader and Acrobat 9.x before 9.2, 8.x before 8.1.7, and possibly 7.x through 7.1.4 might allow attackers to execute arbitrary code via unspecified vectors.","cve_published_at":"2009-10-19T22:30:00.000Z","description":null,"solution":null,"wasc_id":null,"severity":9,"threat":9,"popular_target":false,"active_internet_breach":true,"easily_exploitable":true,"malware_exploitable":true,"predicted_exploitable":false,"custom_fields":[],"first_found_on":"2019-06-05T05:22:23Z","top_priority":true,"risk_meter_score":100,"closed":false}
但在我的请求方法中，我在解析此数据时收到错误，即我无法将 jsonobject 转换为 jsonarray。
这里是get请求方法：
public static void GetRequest() {
BufferedReader reader;
String access_token = "blahblahblah";
String line;
StringBuffer responseContentReader = new StringBuffer();
try {
URL url = new URL("https://api.security.com/vulnerabilities/");
connection = (HttpsURLConnection) url.openConnection();
connection.setRequestProperty("X-Risk-Token ", access_token);
connection.setRequestProperty("Accept", "application/json");
//here we should be able to "request" our setup
//Here will be the method I will use
connection.setRequestMethod("GET");
//after 5 sec if the connection is not successful time it out
connection.setConnectTimeout(5000);
connection.setReadTimeout(5000);
int status = connection.getResponseCode();
//System.out.println(status); //here the connect was established output was 200 (OK)
//here we are dealing with the connection isnt succesful
if (status > 299) {
reader = new BufferedReader(new InputStreamReader(connection.getErrorStream()));
while ((line = reader.readLine()) != null) {
responseContentReader.append(" ");
responseContentReader.append(line);
responseContentReader.append("\n");
}
reader.close();
//returns what is successful
} else {
reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = reader.readLine()) != null) {
responseContentReader.append(" ");
responseContentReader.append(line);
responseContentReader.append("\n");
}
reader.close();
}
JsonParser parser = new JsonParser();
Object object = parser.parse(responseContentReader.toString());
JsonArray array = (JsonArray) object; // here is where the exception occurs
for (int i = 0; i < array.size(); i++) {
JsonArray jsonArray = (JsonArray) array.get(i);
JsonObject jsonobj = (JsonObject) jsonArray.get(i);// cannot cast jsonobject to jsonarray
}
//JsonObject jsonObject = (JsonObject) object;
System.out.println( responseContentReader.toString());
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
} finally {
connection.disconnect();
}
}
这里是具体发生错误的地方，老实说我不知道如何继续：
JsonParser parser = new JsonParser();
Object object = parser.parse(responseContentReader.toString());
JsonArray array = (JsonArray) object; // here is where the exception occurs
for (int i = 0; i < array.size(); i++) {
JsonArray jsonArray = (JsonArray) array.get(i);
JsonObject jsonobj = (JsonObject) jsonArray.get(i);// cannot cast jsonobject to jsonarray
}
//JsonObject jsonObject = (JsonObject) object;
System.out.println( responseContentReader.toString());
错误信息是
Exception in thread "main" java.lang.ClassCastException: com.google.gson.JsonObject cannot be cast to com.google.gson.JsonArray
【问题讨论】：
-
返回的数据不是数组。它是一个包含数组的 json 对象。
标签： java arrays json httpresponse