Guice Learning (v) Implementation of multiple interfaces (many Interface implementation)

1. Interface

/* * Creation : 2015年6月30日 */package com.guice.InterfaceManyImpl;publicinterface Service {    publicvoidexecute();}

2, two implementation classes

package  Com.guice.InterfaceManyImpl; public  class  oneservice  Span class= "Hljs-keyword" >implements  service  {  @Override  public  void   execute  () {System.out.println ( "hello! I ' M Service 1! ");}  

package com.guice.InterfaceManyImpl;publicclass TwoService implements Service {    @Override    publicvoidexecute() {        System.out.println("Hello!  I‘M Service 2!");    }}

3, two annotation classes

Packagecom. Guice. Interfacemanyimpl;Import Java. Lang. Annotation. ElementType;Import Java. Lang. Annotation. Retention;Import Java. Lang. Annotation. Retentionpolicy;Import Java. Lang. Annotation. Target;Importcom. Google. Inject. Bindingannotation;@Retention (Retentionpolicy. RUNTIME) @Target ({ElementType. FIELD, ElementType. PARAMETER}) @BindingAnnotationpublic @interface one {}

Packagecom. Guice. Interfacemanyimpl;Import Java. Lang. Annotation. ElementType;Import Java. Lang. Annotation. Retention;Import Java. Lang. Annotation. Retentionpolicy;Import Java. Lang. Annotation. Target;Importcom. Google. Inject. Bindingannotation;@Retention (Retentionpolicy. RUNTIME) @Target ({ElementType. FIELD, ElementType. PARAMETER}) @BindingAnnotationpublic @interface the {}

4. Multi-Interface implementation test class

Packagecom. Guice. Interfacemanyimpl;Importcom. Google. Inject. Binder;Importcom. Google. Inject. Guice;Importcom. Google. Inject. Inject;Importcom. Google. Inject. Module;/* Multiple implementations of the interface: * The structure of this class is injected with two service services, annotated one and oneservice associated, the second is the same as it */public class Interfacemanyimpl {@Inject @One private Service Oneservice;@Inject @Two Private Service Twoservice;public static void Main (string[] args) {Interfacemanyimpl instance = Guice. Createinjector(New Module () {@Override public void Configure (Binder binder) {//Let the annotation class and the implementation class bind Binder. Bind(Service. Class). Annotatedwith(One. Class). to(Oneservice. Class);Binder. Bind(Service. Class). Annotatedwith(Both. Class). to(Twoservice. Class);}        }). getinstance(Interfacemanyimpl. Class);Instance. Oneservice. Execute();Instance. Twoservice. Execute();}}

5. Non-annotated multi-interface implementation test class

Packagecom. Guice. Interfacemanyimpl;Importcom. Google. Inject. Binder;Importcom. Google. Inject. Guice;Importcom. Google. Inject. Inject;Importcom. Google. Inject. Module;Importcom. Google. Inject. Name. Named;Importcom. Google. Inject. Name. Names;/** * TODO: Programmers are lazy and don't want to write annotations to differentiate multiple services you can use a template called names provided by Google to generate annotations * @author E468380 * /public class Noannotationmultiinterfaceservicedemo {@Inject @Named ("One") private static Service Oneservice;@Inject @Named ("both") private static Service Twoservice;public static void Main (string[] args) {Guice. Createinjector(New Module () {@Override public void Configure (Binder binder) {//different here Binder. Bind(Service. Class). Annotatedwith(Names. Named("One")). to(Oneservice. Class);Binder. Bind(Service. Class). Annotatedwith(Names. Named("both")). to(Twoservice. Class);Binder. Requeststaticinjection(Noannotationmultiinterfaceservicedemo. Class);}        });Noannotationmultiinterfaceservicedemo. Oneservice. Execute();Noannotationmultiinterfaceservicedemo. Twoservice. Execute();}}

6. Static multi-interface implementation test class

Question (1) How do I write a static injection of multiple services?

 PackageCom.guice.InterfaceManyImpl;ImportCom.google.inject.Binder;ImportCom.google.inject.Guice;ImportCom.google.inject.Inject;ImportCom.google.inject.Module;/** * TODO: You can also inject multiple services statically * * @author E468380 */ Public  class staticmultiinterfaceservicedemo {    @Inject    @One    Private StaticService Oneservice;@Inject    @One    Private StaticService Twoservice; Public Static void Main(string[] args) {Guice.createinjector (NewModule () {@Override             Public void Configure(Binder binder)                {Binder.bind (Service.class). Annotatedwith (One.class). to (Oneservice.class);                Binder.bind (Service.class). Annotatedwith (Two.class). to (Twoservice.class);            Binder.requeststaticinjection (Staticmultiinterfaceservicedemo.class);        }        });        StaticMultiInterfaceServiceDemo.oneService.execute ();    StaticMultiInterfaceServiceDemo.twoService.execute (); }}//If you are not careful what happens if a property is bound to more than one interface? --"cannot bind to multiple services. 

Guice Learning (v) Implementation of multiple interfaces (many Interface implementation)