map集合转为JSON字符串

mybatis查询返回的map集合转换为JSON，并在外面嵌套相关节点
之前有尝试过用JSONObject.put字符串方法将额外字符添加到JSON字符串
jsonobject.put(“message”, map);但是最后输出的值却不是想要的JSON字符串，会多出一些转义符，类似下面这种结构：

json object = {"details":"{"products":[{"pid":"14","name":"zxc","price":"123456"},{"pid":"6","name":"Sony Xperia","price":"35000"},{"pid":"8","name":"Samsung Galaxy Note","price":"32000"},{"pid":"5","name":"htc","price":"26326"},{"pid":"9","name":"Nokia Lumia 800","price":"18000"},{"pid":"2","name":"iphone","price":"12345"},{"pid":"15","name":"sdjnas","price":"12243"},{"pid":"13","name":"Samsung S5222","price":"6500"},{"pid":"11","name":"Nokia C201","price":"4400"},{"pid":"7","name":"Nokia Asha 200","price":"4000"},{"pid":"1","name":"htc","price":"1234"},{"pid":"3","name":"htc","price":"1234"},{"pid":"4","name":"htc","price":"1234"},{"pid":"10","name":"aks","price":"1234"},{"pid":"12","name":"asd","price":"123"}],"success":1}n"}

测来测去还是直接用fastjson中的JSON.toJSONString()方法最简单直接，将查出来的集合放入map中，再通过fastjson转换，输出的json格式简单明了不容易出错，示例如下：
所需依赖：fastjson*

    com.cdxt.his    fastjson    1.2.83 

  import com.alibaba.fastjson.JSON;       public static  String  getSuccessResp(HashMap map){        HashMap map1=new HashMap<>();        HashMap map2=new HashMap<>();        map1.put("data",map);        map1.put("code","1");        map1.put("message","成功");        map2.put("response",map1);        String resultStr= JSON.toJSONString(map2);        return resultStr;    }

{	"response": {		"message": "成功",		"data": {			"item": [{				"patient_name": "陆心莲",				"visit_doctor_name": "张蓉",				"reg_time": "2020-01-01 14:08:30",				"reg_level_code": "41ab76501300ee8c69de",				"register_code": "5fc805cd6e78808132f8",				"reg_level_name": "副主任医师挂号费",				"reg_fee": 11,				"visit_doctor_code": "10047",				"reg_state": "1",				"visit_dept_code": "f48f97b5035b80810094",				"visit_time": "2020-01-01 14:25:41"			}, {				"patient_name": "陆心莲",				"visit_doctor_name": "罗蓉",				"reg_time": "2020-01-02 15:39:46",				"reg_level_code": "ddce766e430380816ffc",				"register_code": "6546e166396d808169db",				"reg_level_name": "普通门诊挂号费（主治医师）",				"reg_fee": 9,				"visit_doctor_code": "10194",				"reg_state": "1",				"visit_dept_code": "f48f97b5035b80810094",				"visit_time": "2020-01-02 16:02:21"			}, {				"patient_name": "陆心莲",				"visit_doctor_name": "罗蓉",				"reg_time": "2020-01-16 10:03:32",				"reg_level_code": "ddce766e430380816ffc",				"register_code": "ac1d0b451f9580815150",				"reg_level_name": "普通门诊挂号费（主治医师）",				"reg_fee": 9,				"visit_doctor_code": "10194",				"reg_state": "1",				"visit_dept_code": "f48f97b5035b80810094",				"visit_time": "2020-01-16 10:09:42"			}]		},		"code": "1"	}}

学习记录，仅供参考，谢谢。。。。