在通过socket的获取的json数据，在拿json对应的数据是报错：at json of type java.lang.String cannot be converted to JSONObject。求大神指导
{"key":"tpgsg","json":"{\"T1\":[{\"GP\":\"GS\",\"GPID\":\"GS01\",\"GPName\":\"\u6897\u4E1D\u67DC01\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 15:4:32\",\"GPOutDateTime\":\"0-0-0 0:0:0\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS02\",\"GPName\":\"\u6897\u4E1D\u67DC02\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-5 15:52:17\",\"GPOutDateTime\":\"2017-1-6 11:2:47\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS03\",\"GPName\":\"\u6897\u4E1D\u67DC03\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 12:8:34\",\"GPOutDateTime\":\"0-0-0 0:0:0\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS04\",\"GPName\":\"\u6897\u4E1D\u67DC04\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 7:45:22\",\"GPOutDateTime\":\"2017-1-6 13:55:39\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS05\",\"GPName\":\"\u6897\u4E1D\u67DC05\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 9:33:34\",\"GPOutDateTime\":\"0-0-0 0:0:0\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS06\",\"GPName\":\"\u6897\u4E1D\u67DC06\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 1:26:52\",\"GPOutDateTime\":\"2017-1-6 15:13:45\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS07\",\"GPName\":\"\u6897\u4E1D\u67DC07\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-6 5:33:13\",\"GPOutDateTime\":\"2017-1-6 7:41:17\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"},{\"GP\":\"GS\",\"GPID\":\"GS08\",\"GPName\":\"\u6897\u4E1D\u67DC08\",\"BatchID\":\"\",\"MATNAME\":\"\",\"GPInDateTime\":\"2017-1-5 1:34:41\",\"GPOutDateTime\":\"2017-1-5 2:46:20\",\"GPInQty\":\"0.00\",\"GPQty\":\"0.00\",\"GPQtyP\":\"100.00\",\"GPTime\":\"0\",\"Status\":\"0.0\",\"GPStatus\":\"\u51FA\u67DC\u7ED3\u675F\"}]}"}
string不能被转成jsonObject，，json对象
传过来的json是String类型的，不能转成JsonObject
JsonObject result=new JsonObject(result);
String json=result.getString("json");
JsonObject jo=new JsonObject(json);