我有两个类:
public class Order{
private Integer id;
private List<Position> positions;
...
}
public class Position{
private Integer id;
private String content;
...
}
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现在,我有一个包含订单的列表,并希望获得具有特定内容的所有订单.目前我这样做:
List<Order> orders = ... ;
List<Order> outputOrders = ... ;
for(Order order : orders){
if(select(order.getPositions(), having(on(Position.class).getContent(),equalTo("Something"))).size() != 0){
outputOrders.add(order);
}
}
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使用lambdaj有更好的方法吗?
提前致谢.
我想在Java-SE应用程序中使用拦截器,并且将焊接用作CDI实现,并且在这里进行测试:
主班:
public static void main(String[] args) {
WeldContainer weldContainer = new Weld().initialize();
Service service = weldContainer.instance().select(Service.class).get();
service.methodCall();
service.methodCallNumberTwo();
}
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服务等级:
public class Service {
@TestAnnotation
public void methodCall(){
System.out.println("methodCall...!");
methodCallNumberTwo();
}
@TestAnnotation
public void methodCallNumberTwo(){
System.out.println("methodCallNumberTwo...!");
}
}
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拦截器类:
@Interceptor
@TestAnnotation
public class TestInterceptor {
@AroundInvoke
public Object interceptorMethod(InvocationContext invocationContext) throws Exception {
System.out.println("I'm the TestInterceptor of "+invocationContext.getMethod());
return invocationContext.proceed();
}
}
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Aaa和输出:
I'm the TestInterceptor of public void Service.methodCall()
methodCall...!
methodCallNumberTwo...!
I'm the TestInterceptor of public void Service.methodCallNumberTwo() …
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