一个冷门json类JacksonJsonParser中的坑

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JacksonJsonParser是spring boot里面的一个json类，他能够解析json数据，一开始发现spring boot中有json解析很高兴，不用再去引入依赖，结果使用的时候才发现一个大坑。那就是解析复杂的嵌套json会导致引号丢失。

public Object jsonUtil(String json,String key) {
		JacksonJsonParser jacksonJsonParser = new JacksonJsonParser();
		Map map = jacksonJsonParser.parseMap(json);
		for(String keyString:map.keySet()) {
			if (keyString.equals(key)) {
				return map.get(key);
			}
		}
		return null;
	}

传入json和自己所需要的value的key返回value

当传入的json是正确的json数据返回的是一个‘假’的json，为什么说是假的呢，因为所有的引号都丢失了

{"did":"856018102A180006","measureData":{"roll":{"receivedDate":1554275432618,"value":"0.0","eventDate":1554275409000},"pitch":{"receivedDate":1554275432618,"value":"0.0","eventDate":1554275409000},"yaw":{"receivedDate":1554275432618,"value":"0.0","eventDate":1554275409000},"voltage":{"receivedDate":1554275432618,"value":"0.0","eventDate":1554275409000}},"alertData":{"anglechange":{"msg":"angle change","level":"Error","source":"Device","receivedDate":1554877853352,"eventDate":1554849068000},"type":"Alert"},"msgID":0}

我要获取alertData的内容

{anglechange={msg=angle change, level=Error, source=Device, receivedDate=1554881337850, eventDate=1554852553000}, type=Alert}

这就导致了当我想再获取剩下嵌套的value的时候，key都没有引号报错

转载于:https://my.oschina.net/u/4100388/blog/3034702