Two uses that eclipse should know: automatic generation of interfaces and JUnit test classes

(3) automatically generates its interface through a class:

In spring applications, we often use the "interface + implementation Class" form, that is, to implement a class and write a method similar to the interface, sometimes feel more cumbersome. In fact, eclipse can automatically extract interfaces from a class.

The code for Personserviceimpl.java is as follows:

Right-click in the blank of the above code, or right-click on the Personserviceimpl class name-> refactor–> Extract Interface, as shown in the following figure:

In the Extract Interface dialog box, enter the interface name in the Interface Name box: Personservice, select the Addperson and Queryperson methods, as shown in the following figure: