Introduction - If you have any usage issues, please Google them yourself
Replace the two main functions to achieve the same type of data, generally used
Front-end data acquisition package after class, will replace the data back to the entity class returned for modifying, very practical. Copy method (Object obj, Object target, boolean setNull) contains overloaded. obj: front-end collection of data objects, target: the object returned backstage, setNull, if the front-end data is empty, can be inserted into the target object is null, the default false