1. 简介
Google Guice 是一个轻量级的依赖注入框架,它支持Java 5或者更高版本的JDK。Noear Solon 也是一个轻量级的依赖注入框架,它支持Java 8或者更高版本的JDK
本文会通过一些例子来初步的认识一下 Guice 和 Solon 的区别,及互通性。
2. 添加依赖
guice
<dependency>
<groupId>com.google.inject</groupId>
<artifactId>guice</artifactId>
</dependency>
solon
<dependency>
<groupId>org.noear</groupId>
<artifactId>solon</artifactId>
</dependency>
3. 基础用法对照
- (a) 注入
Guice 的项目代码样例(略过 logger 和 communicator 的来源)
public class Communication {
@Inject
private Logger logger;
@Inject
private Communicator communicator;
public boolean sendMessage(String message) {
return communicator.sendMessage(message);
}
public static void main(String[] args){
Injector injector = Guice.createInjector();
Communication comms = injector.getInstance(Communication.class)
comms.sendMessage("软件质量保障");
}
}
Solon 的项目代码样例(略过 logger 和 communicator 的来源)
@Component
public class Communication {
@Inject
private Logger logger;
@Inject
private Communicator communicator;
public boolean sendMessage(String message) {
return communicator.sendMessage(message);
}
public static void main(String[] args){
Solon.start(Communication.class, args);
Communication comms = Solon.context().getBean(Communication.class);
comms.sendMessage("软件质量保障");
}
}
- (b) 反向控制绑定
Guice。此模块实现将Communicator绑定到其默认实现类DefaultCommunicatorImpl上,在找到Communicator的地方都将注入Default CommunicatorImpl的实例。
public class BasicModule extends AbstractModule {
@Override
protected void configure() {
bind(Communicator.class).to(DefaultCommunicatorImpl.class);
}
}
Solon。则通过在 DefaultCommunicatorImpl 类上,添加组件注解。
@Component
public class DefaultCommunicatorImpl extneds Communicator{
}
- © by name 注入
Guice
@Inject @Named("DefaultCommunicator")
Communicator communicator;
@Override
protected void configure() {
bind(Communicator.class)
.annotatedWith(Names.named("DefaultCommunicator"))
.to(DefaultCommunicatorImpl.class);
}
Solon
@Inject("DefaultCommunicator")
Communicator communicator;
@Component("DefaultCommunicator")
public class DefaultCommunicatorImpl extneds Communicator{
}