json字符串怎转换成json对象？

Question

例如：有这样的字符串[{"CityId":18,"CityName":"西安","ProvinceId":27,"CityOrder":1},{"CityId":53,"CityName":"广州","ProvinceId":27,"CityOrder":1}]，用js转换成json对象，请高手指导

Answer 1

public&nbsp;@ResponseBody&nbsp;Map<String,&nbsp;String>&nbsp;categor()&nbsp;{&nbsp;&nbsp;Map<String,&nbsp;String>&nbsp;data&nbsp;=&nbsp;new&nbsp;HashMap<String,&nbsp;String>();&nbsp;&nbsp;List<ProductCategory>&nbsp;list&nbsp;=&nbsp;productCategoryService.findRoots();&nbsp;&nbsp;JsonConfig&nbsp;jsonConfig&nbsp;=&nbsp;new&nbsp;JsonConfig();&nbsp;&nbsp;jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);&nbsp;&nbsp;jsonConfig.setExcludes(new&nbsp;String[]{//只要设置这个数组，指定过滤哪些字段。&nbsp;&nbsp;"children",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"products",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"brands",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"parameterGroups",&nbsp;&nbsp;"promotions",&nbsp;&nbsp;&nbsp;"attributes"&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;});&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;JSONArray&nbsp;jsonObjectFromMap&nbsp;=&nbsp;JSONArray.fromObject(list,jsonConfig);&nbsp;&nbsp;data.put("rootProductCategories",&nbsp;jsonObjectFromMap.toString());&nbsp;&nbsp;return&nbsp;data;&nbsp;&nbsp;}&nbsp;&nbsp;扩展资料JSON对象是直接可以使用JQuery操作的格式，如C#中可以用对象（类名）点出属性（方法）一样JSON字符串仅仅只是一个字符串，一个整体，不截取的话没办法取出其中存储的数据，不能直接使用，除非你只想alert()他；