getInputStream()抛出异常后，如何取得实际返回的json语句？

[雨中的月儿]

先上代码（HttpsUrlConnection客户端）：

 inputStream = httpsConn.getInputStream();    //  在这个地方抛出异常
			InputStreamReader isr = new InputStreamReader(inputStream);
			BufferedReader reader = new BufferedReader(isr);
			
			StringBuilder stringBuilder = new StringBuilder();
			String strReadLine = null;
			while ((strReadLine = reader.readLine()) != null) {
				stringBuilder.append(strReadLine).append("\r\n");
			}
			
			httpsResp.strRespBody = stringBuilder.toString();
			httpsResp.iRespStatusCode = httpsConn.getResponseCode();
			httpsResp.strRespMessage = httpsConn.getResponseMessage();
			httpsResp.iCheckValid = 1;
			httpsResp.respHeaders = httpsConn.getHeaderFields();

正常情况下，上述代码根据getInputStream可以读出服务器返回的json语句。
但在向服务器发送错误的json语句请求体之后，服务器会返还400错误，并附带json语句用于描述错误消息。如下：
HTTP/1.1 400 Bad Request
Server: Tengine
Date: Wed, 26 Aug 2015 11:12:11 GMT
Content-Type: application/json;charset=utf-8
Content-Length: 180
Connection: keep-alive
Cache-Control: no-cache,no-store
Pragma: no-cache

{"code":111,"error":"Invalid value type for field 'Relation01',expect type is {:className \"Test01\", :type \"Relation\"},but it is '{:className \"Test02\", :type \"Relation\"}'."}

请问高手，此时，由于400错误，getInputStream()的调用会抛出异常（导致inputStream变量为null），跳转到异常处理之后，如何取得服务器发送过来的json语句。

[雨中的月儿]

自己已经解决~~~

			int iRetCode = httpsConn.getResponseCode();
			if (iRetCode >= 400) {
				inputStream = httpsConn.getErrorStream();
				result = MuYaHttpsRespResult.Refused;
			}
			else {
				inputStream = httpsConn.getInputStream();
				result = MuYaHttpsRespResult.Success;
			}
			
			InputStreamReader isr = new InputStreamReader(inputStream);
			BufferedReader reader = new BufferedReader(isr);
			
			StringBuilder stringBuilder = new StringBuilder();
			String strReadLine = null;
			while ((strReadLine = reader.readLine()) != null) {
				stringBuilder.append(strReadLine).append("\r\n");
			}
			
			httpsResp.strRespBody = stringBuilder.toString();
			httpsResp.iRespStatusCode = httpsConn.getResponseCode();
			httpsResp.strRespMessage = httpsConn.getResponseMessage();
			httpsResp.result = result;
			httpsResp.respHeaders = httpsConn.getHeaderFields();	

[zhuangqingch]