标签: annotations

这是我的应用程序:

public static void main( String[] args ) {
    AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class);

    //run the importer
    final ImportNewOrders importer = (ImportNewOrders) ApplicationContextProvider.getApplicationContext().getBean("importNewOrders");
    importer.run();
    //importer.runInBackground();
}

这是我的配置:

@Configuration
@ComponentScan(basePackages = {
        "com.production"
})
@PropertySource(value = {
        "classpath:/application.properties",
        "classpath:/environment-${MY_ENVIRONMENT}.properties"
})
@EnableJpaRepositories("com.fettergroup.production.repositories")
@EnableTransactionManagement
public class Config {

    .... skipping things that aren't relevant

    @Bean
    public ImportNewOrders importNewOrders() {
        return new ImportNewOrders();
    }

这是我的班级......

@Component
public class ImportNewOrders implements Task {

    private final static Logger logger = Logger.getLogger(ImportNewOrders.class.getName());

    @Autowired
    private OrderService orderService;

    @Autowired …

我在我的实体定义中使用doctrine注释来定义每个变量行为,即:

@ORM\Column(type="string", length=50, nullable=false)

如果我提交表单,将该字段留空,则通过验证,但是(对于corse)我收到有关INSERT语句的错误,因为他无法插入NULL值.这怎么可能？

我想知道我的代码有什么问题,因为当我尝试测试我的代码时,我什么也得不到.

public class SeleniumTest {

private WebDriver driver;
private String nome;
private String idade;

@FindBy(id = "j_idt5:nome")
private WebElement inputNome;

@FindBy(id = "j_idt5:idade")
private WebElement inputIdade;

@BeforeClass
public void criarDriver() throws InterruptedException {

    driver = new FirefoxDriver();
    driver.get("http://localhost:8080/SeleniumWeb/index.xhtml");
    PageFactory.initElements(driver, this);

}

@Test(priority = 0)
public void digitarTexto() {

    inputNome.sendKeys("Diego");
    inputIdade.sendKeys("29");

}

@Test(priority = 1)
public void verificaPreenchimento() {

    nome = inputNome.getAttribute("value");
    assertTrue(nome.length() > 0);

    idade = inputIdade.getAttribute("value");
    assertTrue(idade.length() > 0);
}

@AfterClass
public void fecharDriver() {

    driver.close();

}

}

我正在使用 …

我正在尝试使用@Scheduled功能.我已经按照这个和本教程,但我不能让我的计划任务被执行.

我创造了一个工人:

@Component("syncWorker")
public class SyncedEliWorker implements Worker {
    protected Logger logger = Logger.getLogger(this.getClass());

    public void work() {
        String threadName = Thread.currentThread().getName();
        logger.debug("   " + threadName + " has began to do scheduled scrap with id=marketwatch2");
    }
}

和SchedulingService:

@Service
public class SchedulingService {
    protected Logger logger = Logger.getLogger(this.getClass());

    @Autowired
    @Qualifier("syncWorker")
    private Worker worker;

    @Scheduled(fixedDelay = 5000)
    public void doSchedule() {
        logger.debug("Start schedule");

        worker.work();
        logger.debug("End schedule");
    }
}

并尝试在我的applicationcontext中进行不同的布线.最终版本如下:

<beans xmlns=...
       xmlns:task="http://www.springframework.org/schema/task"
       ...
       xsi:schemaLocation=" ..
                            http://www.springframework.org/schema/task …

//我的工厂课

@Component
public class UserRewardAccountValidatorFactory {

    @Autowired
    private VirginAmericaValidator virginAmericaValidator;

    private static class SingletonHolder {
        static UserRewardAccountValidatorFactory instance = new UserRewardAccountValidatorFactory();
    }

    public static UserRewardAccountValidatorFactory getInstance() {
        return SingletonHolder.instance;
    }

    private UserRewardAccountValidatorFactory() {}

    public PartnerValidator getPartnerValidator(Partner partner){
            return virginAmericaValidator;
    }
}

//我的Validator类

@Service
public class VirginAmericaValidator implements PartnerValidator {

    @Override
    public void validate(String code) throws InvalidCodeException{
        //do some processing if processing fails throw exception
        if (code.equals("bad".toString())){
            throw new InvalidCodeException();
        }
    }
}

//用法:

    PartnerValidator pv = UserRewardAccountValidatorFactory.getInstance().getPartnerValidator(partner);
    if (pv != …

我有2个不同的按钮,可以在一个mapview中触发一组不同的注释.我有一些淡出按钮的动作方法,在这一点上应该出现一个注释,但是我无法弄清楚如何在注释方法中说"如果激活了这个动作,那么从这个类加载注释".所以这是我目前的代码

- (void)queryForAllPostsNearLocation:(CLLocation *)currentLocation withNearbyDistance:(CLLocationAccuracy)nearbyDistance {
if (????? IBAction 1 is activated ?????) {
    NSString *button1 = @"Today";
}
if (????? IBAction 2 is activated ?????) {
    NSString *button1 = @"Tomorrow";
}
PFQuery *query = [PFQuery queryWithClassName:button1];

我希望我能正确地传达我的问题,有人可以帮助我.

我的java应用程序使用Spring构造型注释(@Controller,@ Component)和autowire注释来管理依赖注入.

它不是Web应用程序,只是简单的jar.它也是基于纯注释的代码,即根本没有xml.

什么是从main方法初始化基于Spring注释的应用程序上下文和默认配置的正确方法？

我写了3个类"PrintDevice,Printer,Test"如下

首先,PrintDevice.java

public @interface PrintDevice{
    String defaultPrint();
    int defaultNumber();
}

第二,Printer.java

@PrintDevice(defaultPrint="print",defaultNumber=5)
public class Printer{
    public Printer(){
        //empty Construcutor
    }
    @PrintDevice(defaultPrint="print",defaultNumber=5)
    public void print(int number){
        System.out.println(number);
    }
}

第三,Test.java

import java.lang.reflect.*;
public class Test{
    public static void main(String[] args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException{
        Printer printer = new Printer();
        PrintDevice anno = printer.getClass().getAnnotation(PrintDevice.class);
        Method m = printer.getClass().getMethod(anno.defaultPrint(),int.class);
        m.invoke(printer,anno.defaultNumber());
    }
}

并且没有任何问题地编译它们,但是当我尝试运行Test.java时,我得到NullPointerExcetion如下: -

Test.main中线程"main"java.lang.NullPointerException中的异常(Test.java:7)

为什么我的场景中的第二个测试在行The value for annotation attribute SuppressWarnings.value must be an array initializer上有语法错误SuppressWarnings？

public class AnnotationTest {
    private static final String supUnused = "unused";
    private static final String supDeprecation = "deprecation";
    private static final String[] suppressArray = { "unused", "deprecation" };

    public static void main(String[] args) {
        // Test 1
        @SuppressWarnings( { supUnused, supDeprecation } )
        int a = new Date().getDay();

        // Test 2
        @SuppressWarnings(suppressArray)    // syntax error
        int b = new Date().getDay();
    }
}

如果您将参数作为两个单一常量传递,则可以正常工作.
如果您使用数组常量传递它,则会出现语法错误.

这个错误的解释是什么？

从PEP 3107,http: //www.python.org/dev/peps/pep-3107/#parameters,我刚刚注意到一些我不了解并且不太了解的功能注释的额外语法.

def foo(a: expression, b: expression = 5):
    ...

这是我不确定的第二部分,expression = 5.你会如何在实际意义上使用它？当然不要指定默认参数,这已经是不言而喻的了.