com.alibaba.fastjson.JSONException: synt?400报错

com.alibaba.fastjson.JSONException: syntax error, pos 6, json : 

代码写了 ，但是报错了

    JSONObject querySql = JSON.parseArray(ccont).getJSONObject(0).getJSONObject("reader")
                    .getJSONObject("parameter").getJSONObject("querySql");;
            

要解析的json是  [{"reader":{"parameter":{"querySql":"SELECT * FROM  `t_rsd_model_history` t  WHERE  t.`status`  = '正在执行' ;","readsource":""},"name":"mysqlreader"},"writer":{"parameter":{"writersource":"","column":["model_name"],"writeMode":"insert","batchSize":["22"],"table":["t_rsd_model_history"],"preSql":["SELECT * FROM  `t_rsd_model_history` t  WHERE  t.`status`  = '正在执行' ;"]},"name":"mysqlwriter"}}]