构造函数注入 
字段注入会
方法注入

Provider注入
interface Provider< T > {
  T get();
}
懒加载 ,在需要时通过Provider获取

命名注入 解决冲突
@Inject @Named("dbSpec") private String dbSpec;

注入和绑定 分开
一般继承AbstractModule，实现 configure 方法 进行绑定

类名绑定
实例绑定 Instance Bindings
连接绑定 Linked Bindings
Provider绑定 Provider Bindings
命名绑定 Binding Annotations
泛型绑定
集合绑定



Injector injector = Guice.createInjector(new XxxModule());
XxxService xxxService = injector.getInstance(XxxService.class);



import com.google.inject.AbstractModule;

public class HelloModule extends AbstractModule{

	@Override
	protected void configure() {
		bind(ServiceA.class).to(ServiceAImpl.class);
		bind(ServiceB.class).to(ServiceBImpl.class);
		// bind(Hello.class).to(Hello.class);
	}
}



import javax.inject.Inject;
import javax.inject.Singleton;

import com.google.inject.Guice;
import com.google.inject.Injector;

@Singleton
public class Hello {
	
	@Inject 
	private ServiceA serviceA;
	@Inject 
	private ServiceB serviceB;

	
	public static void main(String[] args) throws Exception {
		System.out.println("hello,guice");	
		Injector injector = Guice.createInjector(new HelloModule()); 
		Hello hello = injector.getInstance(Hello.class);
		hello.hello();
	}
	
	public void hello() {
		serviceA.hello();
		serviceB.hello();
	}
}


完整代码
https://gitee.com/dyyx/hellocode/tree/master/demo/guicedemo