【JSON】使用com.fasterxml.jackson解析json字符串

感觉这种解析方式还可以，推荐一下

引入包

   <dependency>
      com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
       <version>2.13.0  </version>
    </dependency>

示例

 ObjectMapper mapper = new ObjectMapper();
 JsonNode rootNode = mapper.readTree(jsonString);
 JsonNode onlineMeetingMsgNode = rootNode.path("response").path("online").path("onlineMsg");
 String onlineMeetingMsg = onlineMeetingMsgNode.asText();
 JsonNode onlineMeetingMsgJson = mapper.readTree(onlineMeetingMsg);

 String externalUrl = onlineMeetingMsgJson.path("external").asText();