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();
}
}
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执行结果：
run AnimalModule.configure()
run Cat.constructor()
name==>Tom
i am a cat
