Adapter Mode Adapter

One system wants to use another system's data source, but the data source format does not meet its own requirements, which can be used in adapter mode

One example: The data provided by the personnel system returns the map type, but the financial system needs a List type of data

Data sources provided by the personnel system:

1 ImportJava.util.HashMap;2 ImportJava.util.Map;3 4  Public classpeople {5      PublicMap<object, object>Getorgname () {6Map<object, object> map =NewHashmap<>();7Map.put (1, "personnel Department");8Map.put (2, "Administrative Office");9Map.put (3, "Finance Office"));Ten         returnmap; One     } A}

Call mode in the personnel system:

1 ImportJava.util.Map;2 3  Public classpclient {4 5      Public Static voidMain (string[] args) {6People people =Newpeople ();7Map<object, object> map =people.getorgname ();8          for(inti = 0; I < map.size (); i++) {9System.out.println (Map.get (i + 1));Ten         } One  A     } -  -}

The financial system uses the data source adapter:

1 Importjava.util.ArrayList;2 ImportJava.util.Map;3 4  Public classPeopleadapterextendsArraylist<object> {5     Privatemap<?,? >map;6 7      PublicPeopleadapter (map<?,? >map) {8         Super();9          This. Map =map;Ten     } One  A      Public intsize () { -         returnmap.size (); -     } the  -      PublicObject Get (inti) { -         returnMap.get (i); -     } +}

Financial system calls:

1  Public classeclient {2 3      Public Static voidMain (string[] args) {4Peopleadapter list =NewPeopleadapter (Newpeople (). Getorgname ());5          for(inti = 0; I < list.size (); i++) {6System.out.println (List.get (i + 1));7         }8     }9 Ten}

Adapter Mode Adapter