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JAVA中JSONObject对象和Map对象之间的相互转换

 2021-01-14 15:01:13     

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:


https://json字

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:

https://json字符串
String jsondata="{\"contend\":[{\"bid\":\"22\",\"carid\":\"0\"},{\"bid\":\"22\",\"carid\":\"0\"}],\"result\":100,\"total\":2}";
JSONObject obj= JSON.parseObject(jsondata);
https://map对象
Map<String, Object> data =new HashMap<>();
https://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

https://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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