原文地址:https://code.google.com/p/google-guice/wiki/ToConstructorBindings
Constructor Bindings(构造器绑定):在父类型上绑定子类实现的构造函数。
贴代码:
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|
public interface Animal {
void say();
} import com.google.inject.AbstractModule;
public class AnimalModule extends AbstractModule {
@Override
protected void configure() {
bind(String. class ).toInstance( "Tom" );
try {
bind(Animal. class ).toConstructor(Cat. class .getConstructor(String. class ));
} catch (NoSuchMethodException e) {
addError(e);
}
System.out.println( "run AnimalModule.configure()" );
}
} public class Cat implements Animal {
String name;
public Cat(String name) {
this .name = name;
System.out.println( "run Cat.constructor()" );
}
@Override
public void say() {
System.out.println( "i am a cat" );
}
@Override
public String toString() {
return "name==>" + this .name;
}
} 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());
Animal cat = injector.getInstance(Animal. class );
System.out.println(cat);
cat.say();
}
} |
执行结果:
run AnimalModule.configure()
run Cat.constructor()
name==>Tom
i am a cat