public T fromJson(String jsonString,Class objectClass,String dateFormat);
public List fromJsonToList(String jsonString,String dateFormat);
public List fromJson(String jsonString,Class objectClass,String dateFormat);
public Collection jsonToCollection(String jsonString,Class objectClass,String dateFormat);
public Object[] jsonToArray(Strng jsonString,String dateFormat);
这几个方法如何实现?