java.lang.ClassCastException：java.lang.String不能强制转换为org.json.JsonObject

Question

我点击API，得到的响应是

{"headers":{"Keep-Alive":["timeout=4, max=500"],"Server":["Apache"],"X-Content-Type-Options":["nosniff"],"Connection":["Keep-Alive"],"Vary":["X-Forwarded-For"],"X-XSS-Protection":["1;mode=block"],"Content-Length":["451"],"Content-Type":["application/hal+json"]},"statusCodeValue":200,"body":"{\"id\":\"7199\",\"username\":\"[e-mail]\",\"start_time\":1583212261,\"expire_time\":1583253338,\"sponsor_profile\":\"1\",\"enabled\":false,\"current_state\":\"disabled\",\"notes\":null,\"visitor_carrier\":null,\"role_name\":\"[Guest]\",\"role_id\":2,}

java.lang.ClassCastException: java.lang.String cannot be cast to org.json.JSONObject

我试图获取用户名的逻辑。

ResponseEntity<String> resp = restTemplate.exchange(
                            reader.getAccountURL() + request.getUsername(),
                            HttpMethod.GET, entity, String.class);
JSONObject accountDetails = new JSONObject(resp);
Object getBody =  accountDetails.get("body");
Object alreadyExits = ((JSONObject) getBody).get("username");

我做错了什么？

Answer 1

请执行以下步骤：

1. 获取正文字符串:string bodyString=resp.getString（“body”）；
2. 将bodyString解析为JSONObject：JSONObject body=new JSONObject（bodyString）；
3. 获取用户名:String usename=body.getString（“username”）；

这应该管用。