如何在Android环境下支持Spring框架下得AOP，DI，Aspect等

大家都知道，Spring在JavaEE开发中扮演着非常重要的地位。

可以利用它的依赖注入（DI）很好的实现各个模块直接的解耦。

可以利用它的AOP很好的实现面向方面的编程，实现与事务无关的业务逻辑（事务代码写在切面中）

可以使用不同的注解（@Controller；@Service；@Repository）很好的实现分成架构， 表明各个模块的作用

可以用MVC实现的Controller很好的处理请求和响应客户端请求

可以轻松的使用集成其他第三方组件实现的功能等。

那这么好的功能，如何能在Android上使用呢，服务于Android开发者呢？

现在给大家推荐一个第三方库， 可以很方便的集成到您的应用里面，获取以上这些功能

项目地址：https://github.com/hianzuo/android-spring

Introduction

Android-spring is a android library project support IOC , DI , AOP and HTTP/Handler , it use annotation to config 。 It contains a simple project.

Add the dependency

dependencies {
  compile 'com.hianzuo.android:LibSpring:1.0.4'
}

Init spring from Application

public class SimpleApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
//if in dev mode ,please line blow code
SpringInitializer.devMode();
//spring init， you can add more package to scan spring component.
SpringInitializer.init(this,
"com.hianzuo.spring.simple.test.",
"other package to scan spring component");
}
}

DI Support in Activity

public class MainActivity extends AppCompatActivity {

@Resource
private TestService testService;

@Resource
private PrintService printService;

@Resource(beanName = "testBean")
private BeanTest testBean;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
testService.handle();
setContentView(R.layout.activity_main);
TextView tv = findViewById(R.id.tv);
tv.setText(printService.print() + "\n\n" + testBean.getText());
}
}

Configuration Bean

@Component
@Configuration
public class TestConfiguration {

@Bean("testBean")
public BeanTest bean1() {
return new BeanTest("bean name in annotation");
}

@Bean
public BeanTest methodIsBeanName() {
return new BeanTest("method is bean name");
}
}

AOP

@Aspect
public class TestServiceAspect {

@Pointcut("^.*?handle\\(\\).*+$")
public void handle() {
System.out.println("AAA TestServiceAspect handle");
}

@Before("handle")
public void before(JointPoint point) {
System.out.println("AAA TestServiceAspect before");
}

@Around(value = "handle")
public Object around(JointPoint point) {
System.out.println("AAA TestServiceAspect around start");
Object result = point.invokeResult();
System.out.println("AAA TestServiceAspect around end");
return result;
}

@After(value = "handle")
public void after(JointPoint point) {
System.out.println("AAA TestServiceAspect after");
}

Service Annotation Support

@Service
public class TestServiceImpl implements TestService {
@Resource
private PrintService printService;

@Resource(beanName = "testBean")
private BeanTest testBean;

@Resource(beanName = "methodIsBeanName")
private BeanTest testBean1;

@Override
public void handle() {
printService.print();
System.out.println("AAA BeanTest :" + testBean.getText());
System.out.println("AAA BeanTest1 :" + testBean1.getText());
System.out.println("AAA TestService.handle.");
}

@Override
public void execute() {
System.out.println("AAA TestService.execute.");
}
}

Cache Support

@Component
public class DemoProviderImpl extends AbstractCacheAble<Integer, Demo> {
@Override
protected Integer getKey(Demo demo) {
return demo.getId();
}

@Override
protected List<Demo> loadData() {
//load Demo data from remote server or database
ArrayList<Demo> list = new ArrayList<>();
list.add(new Demo(1, "aaa"));
list.add(new Demo(2, "bbb"));
return list;
}
}

Http Handler Support

@Handler("/api/login")
public class HttpLoginHandler extends BaseHandler {

@Override
protected Object getMethodParamObjectByType(Class<?> type) {
if(type == LoginData.class){
String username = (String) getMethodParamObject("username");
String password = (String) getMethodParamObject("password");
return new LoginData(username,password);
}
return super.getMethodParamObjectByType(type);
}

@Override
protected Object getMethodParamObject(String value) {
// get value from request.
// demo request.getParameter(value);
return null;
}

@CheckMethod
protected String check(@MethodParam("username") String username) {
if (StringUtil.isEmpty(username) || username.trim().length() < 4) {
throws new RuntimeException("用户名不能为空");
}
return null;
}

@Resource
private LoginService loginService;

//you can use @MethodParam Annotation to get parameter
/*@HandleMethod
public void handle(@MethodParam("username") String username, @MethodParam("password") String password) {
loginService.login(username, password);
}*/

//you can get DataModel in Method Param , register in (Object getMethodParamObjectByType(Class<?> type))
@HandleMethod
public void handle(LoginData data) {
loginService.login(data.getUsername(), data.getPassword());
}
}

Repository Annotation Support

@Repository like @Service Annotation for the Component.