Groovy高效编程——Annotations的使用

import  com.google.inject. *
interface  LoginService {
boolean  check(String name, String password)
}
@Singleton
class  LoginServiceImpl  implements  LoginService {
boolean  check(String name, String password) {
if  (name  ==   " Daniel "   &&  password  ==   " 123456 " ) {
return   true
}
return   false
}
}
class  LoginController {
@Inject
private  LoginService loginService
public   void  setLoginService(LoginService loginService) {
this .loginService  =  loginService
}
public   void  execute() {
String name  =   " Daniel "
String password  =   " 123456 "
login(name, password)
}
public   void  login(String name, String password) {
boolean  result  =  loginService.check(name, password)
if  (result) {
println  " Welcome, $name "
}  else  {
println  " Sorry, the name or password inputted is invalid! "
}
}
}
class  LoginModule  implements  Module {
void  configure(Binder binder) {
binder.bind(LoginService)
.to(LoginServiceImpl)
.in(Scopes.SINGLETON)
}
}
def loginInjector  =  Guice.createInjector( new  LoginModule())
def loginController  =  loginInjector.getInstance(LoginController)
loginController.execute()