https://developers.google.com/search/docs/guides/intro-structured-data Structured data refers to kinds of data with a high level of organization, such as information in a relational database. When information is highly structured and predictable, sea
转换时Bean所要求的: 被转换的Bean必需是public的. Bean被转换的属性一定要有对应的get方法,且一定要是public的. Bean中不能用引用自身的this的属性,否则运行时出现et.sf.json.JSONException: There is a cycle in the hierarchy!异常 json-lib包转换时,不能以null为键名,否则运行报net.sf.json.JSONException:java.lang.NullPointerException:JSO