jackson2.9使用实例，list<jopo>与json的互相转换实例 附带依赖包： jackson-annotations-2.9.2.jar jackson-core-2.9.2.jar jackson-databind-2.9.2.jar jackson-jaxrs-json-provider-2.9.2.jar(Examples of jackson2.9 use, examples of conversion between list<jopo>