JAVA中JSONObject对象和Map对象之间的相互转换
1.由json字符串转换成Map对象
如json字符串:{"contend":[{"bid":"22","carid":"0"},{"bid":"22","carid":"0"}],"result":100,"total":2}
下面直接附代码:
//json字符串 String jsondata="{\"contend\":[{\"bid\":\"22\",\"carid\":\"0\"},{\"bid\":\"22\",\"carid\":\"0\"}],\"result\":100,\"total\":2}"; JSONObject obj= JSON.parseObject(jsondata); //map对象 Map<String, Object> data =new HashMap<>(); //循环转换 Iterator it =obj.entrySet().iterator(); while (it.hasNext()) { Map.Entry<String, Object> entry = (Entry<String, Object>) it.next(); data.put(entry.getKey(), entry.getValue()); } System.out.println("map对象:"+data.toString());
下面是输出内容:
{total=2, contend=[{"carid":"0","bid":"22"},{"carid":"0","bid":"22"}], result=100}
2.由Map对象转换成json字符串
//map对象 Map<String, Object> data =new HashMap<>(); String x =JSONObject.toJSONString(data); System.out.println("json字符串:"+x);
下面是输出内容:
{"total":2,"result":100,"contend":[{"carid":"0","bid":"22"},{"carid":"0","bid":"22"}]}
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