Guice系列之用户指南（六）

import com.google.inject.ImplementedBy;

@ImplementedBy(value = Cat.class)

public interface Animal {

void say();

}

import com.google.inject.AbstractModule;

import com.google.inject.Singleton;

import com.google.inject.name.Names;

public class AnimalModule extends AbstractModule {

@Override

protected void configure() {

bind(Animal.class)

.annotatedWith(Names.named("Tom"))

.to(Animal.class)

.in(Singleton.class);

System.out.println("run AnimalModule.configure()");

}

}

public class Cat implements Animal {

@Override

public void say() {

System.out.println("i am a cat");

}

}

import javax.inject.Named;

import com.google.inject.Inject;

public class CatWrapper {

Animal animal;

@Inject

private CatWrapper(@Named("Tom") Animal animal) {

System.out.println("CatWrapper.Contructor()");

this.animal = animal;

}

public void say() {

animal.say();

}

public Animal getAnimal() {

return this.animal;

}

}

import com.google.inject.Guice;

import com.google.inject.Injector;

public class Test {

public static void main(String[] args) {

Injector injector = Guice.createInjector(new AnimalModule());

CatWrapper wrapper1 = injector.getInstance(CatWrapper.class);

System.out.println(wrapper1);

System.out.println(wrapper1.getAnimal());

CatWrapper wrapper2 = injector.getInstance(CatWrapper.class);

System.out.println(wrapper2);

System.out.println(wrapper2.getAnimal());

}

}

import com.google.inject.ProvidedBy;

@ProvidedBy(value = AnimalProvider.class)

public interface Animal {

void say();

}

import com.google.inject.AbstractModule;

import com.google.inject.Singleton;

public class AnimalModule2 extends AbstractModule {

@Override

protected void configure() {

bind(Animal.class).in(Singleton.class);

System.out.println("run AnimalModule.configure()");

}

}

import com.google.inject.Provider;

public class AnimalProvider implements Provider<Animal>{

public Animal get() {

System.out.println("run Provider.get()");

return new Cat();

}

}

public class Cat implements Animal {

@Override

public void say() {

System.out.println("i am a cat");

}

}

import com.google.inject.Guice;

import com.google.inject.Injector;

public class Test2 {

public static void main(String[] args) {

Injector injector = Guice.createInjector(new AnimalModule2());

Animal cat_A = injector.getInstance(Animal.class);

System.out.println(cat_A);

Animal cat_B = injector.getInstance(Animal.class);

System.out.println(cat_B);

}

}