Java 线程bean不'；使用JSR330提供程序时，无法在Spring中将Environment@自动连接到它们_Java_Spring_Dependency Injection_Jsr330

Java 线程bean不'；使用JSR330提供程序时，无法在Spring中将Environment@自动连接到它们

java spring dependency-injection

Java 线程bean不'；使用JSR330提供程序时，无法在Spring中将Environment@自动连接到它们,java,spring,dependency-injection,jsr330,Java,Spring,Dependency Injection,Jsr330,希望这个问题是不言自明的 ClassA.java @Component @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) public class ClassA implements InterB { private static int counter=0; private int objectid = 0; @Autowired InterA abcd; public ClassA() {

希望这个问题是不言自明的

ClassA.java

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ClassA implements InterB {
    private static int counter=0;

    private int objectid = 0;
    @Autowired
    InterA abcd;

    public ClassA() {
        super();
        this.objectid = ++counter;
    }

    @Override
    public void dododo() {
        System.out.println("instance number "+objectid++);
        abcd.doit();
    }
}

@Component
@Conditional(OracleDBEngineCondition.class)
public class ClassB extends DummyParent implements InterA {
    @Autowired
    private Environment env;

    @Override
    public void doit() {
        System.out.println("hoo hoo" +" -- "+env.getProperty("DBENGINE"));
    }

}

@Component("classc")
public class ClassC implements Runnable {

    @Autowired
    Provider<InterB> classAPrototypeobj;

    public void doFromAbove() {
        InterB cls = (InterB) classAPrototypeobj.get();
        InterB cls1 = (InterB) classAPrototypeobj.get();
        cls.dododo();
        cls1.dododo();
        System.out.println(cls);
        System.out.println(cls1);

    }

    @Override
    public void run() {
        this.doFromAbove();
    }
}

@Configuration
@ComponentScan
public class ClassConfig {
}

ClassB.java

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ClassA implements InterB {
    private static int counter=0;

    private int objectid = 0;
    @Autowired
    InterA abcd;

    public ClassA() {
        super();
        this.objectid = ++counter;
    }

    @Override
    public void dododo() {
        System.out.println("instance number "+objectid++);
        abcd.doit();
    }
}

@Component
@Conditional(OracleDBEngineCondition.class)
public class ClassB extends DummyParent implements InterA {
    @Autowired
    private Environment env;

    @Override
    public void doit() {
        System.out.println("hoo hoo" +" -- "+env.getProperty("DBENGINE"));
    }

}

@Component("classc")
public class ClassC implements Runnable {

    @Autowired
    Provider<InterB> classAPrototypeobj;

    public void doFromAbove() {
        InterB cls = (InterB) classAPrototypeobj.get();
        InterB cls1 = (InterB) classAPrototypeobj.get();
        cls.dododo();
        cls1.dododo();
        System.out.println(cls);
        System.out.println(cls1);

    }

    @Override
    public void run() {
        this.doFromAbove();
    }
}

@Configuration
@ComponentScan
public class ClassConfig {
}

ClassC.java

@Component
@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class ClassA implements InterB {
    private static int counter=0;

    private int objectid = 0;
    @Autowired
    InterA abcd;

    public ClassA() {
        super();
        this.objectid = ++counter;
    }

    @Override
    public void dododo() {
        System.out.println("instance number "+objectid++);
        abcd.doit();
    }
}

@Component
@Conditional(OracleDBEngineCondition.class)
public class ClassB extends DummyParent implements InterA {
    @Autowired
    private Environment env;

    @Override
    public void doit() {
        System.out.println("hoo hoo" +" -- "+env.getProperty("DBENGINE"));
    }

}

@Component("classc")
public class ClassC implements Runnable {

    @Autowired
    Provider<InterB> classAPrototypeobj;

    public void doFromAbove() {
        InterB cls = (InterB) classAPrototypeobj.get();
        InterB cls1 = (InterB) classAPrototypeobj.get();
        cls.dododo();
        cls1.dododo();
        System.out.println(cls);
        System.out.println(cls1);

    }

    @Override
    public void run() {
        this.doFromAbove();
    }
}

@Configuration
@ComponentScan
public class ClassConfig {
}

主要方法

public static void main(String[] args) {
    ClassC obj;
    try(AbstractApplicationContext appctx = new AnnotationConfigApplicationContext(ClassConfig.class)) {
        obj = (ClassC) appctx.getBean("classc");
    }
    Thread objThread = new Thread(obj);
    objThread.start();
}

更新了主方法（仍然存在相同问题）

执行时，这会导致bean“环境”的

NoSuchBeanDefinitionException

但是，当我们在Config类中定义以下内容时，错误将消失而不留痕迹这是解决方法（但是Spring应该自动注入环境，我们不应该这样做）。不确定有多少这样的bean没有被注入/

@Autowired

@Bean
public Environment environment(ApplicationContext context) {
    return context.getEnvironment();
}

我怀疑这是一个Spring框架错误。。。不是吗

StackTrace:

Exception in thread "Thread-1" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'classA': Unsatisfied dependency expressed through field 'abcd'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:325)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.getObject(DefaultListableBeanFactory.java:1630)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory$Jsr330DependencyProvider.get(DefaultListableBeanFactory.java:1699)
    at tpt.verifypoc.ClassC.doFromAbove(ClassC.java:28)
    at tpt.verifypoc.ClassC.run(ClassC.java:39)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 14 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1207)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$ShortcutDependencyDescriptor.resolveShortcut(AutowiredAnnotationBeanPostProcessor.java:740)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1077)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.resolvedCachedArgument(AutowiredAnnotationBeanPostProcessor.java:548)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.access$200(AutowiredAnnotationBeanPostProcessor.java:117)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:577)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
    ... 25 more

注意：

Exception in thread "Thread-1" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'classA': Unsatisfied dependency expressed through field 'abcd'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:325)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.getObject(DefaultListableBeanFactory.java:1630)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory$Jsr330DependencyProvider.get(DefaultListableBeanFactory.java:1699)
    at tpt.verifypoc.ClassC.doFromAbove(ClassC.java:28)
    at tpt.verifypoc.ClassC.run(ClassC.java:39)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'classB': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
    ... 14 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'environment' available
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1207)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$ShortcutDependencyDescriptor.resolveShortcut(AutowiredAnnotationBeanPostProcessor.java:740)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1077)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.resolvedCachedArgument(AutowiredAnnotationBeanPostProcessor.java:548)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.access$200(AutowiredAnnotationBeanPostProcessor.java:117)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:577)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
    ... 25 more

弹簧：4.3.9.释放

JSR330:javax.inject版本1

我想说，在Spring中，在开始使用关闭

ApplicationContext

的对象之前查看代码并不是一个bug。或者实际上，您使用的try-with-resources块就是这样做的

public static void main(String[] args) {
    ClassC obj;
    try(AbstractApplicationContext appctx = new AnnotationConfigApplicationContext(ClassConfig.class)) {
        obj = (ClassC) appctx.getBean("classc");
    }
    Thread objThread = new Thread(obj);
    objThread.start();
}

基本上与

public static void main(String[] args) {
    ClassC obj;
    AbstractApplicationContext appctx = new AnnotationConfigApplicationContext(ClassConfig.class)) {
        obj = (ClassC) appctx.getBean("classc");

    appctx.close();

    Thread objThread = new Thread(obj);
    objThread.start();
}

在使用对象之前，您正在关闭

ApplicationContext

。剩下的是一个

ClassC

实例，其中提供了一个

的半备份代理

，它需要上下文来查找某些bean。但是，当您从下面拉出注册表时，它无法查找这些bean

关闭

ApplicationContext

时，您正在关闭应用程序。我希望您仍然存在的对象现在是无效的，因为它所属的容器已被销毁

将代码与JDBC代码进行比较。您正在打开一个

连接

，关闭该连接，然后尝试在关闭的连接上准备一条语句。JDBC不允许这样做，因为

连接已关闭，因此无效
将其与Microsoft Excel进行比较，打开它，在工作表中工作，编写宏。关闭excel并期望宏仍能运行。
我想说，这不是Spring中的一个bug，在您开始使用您正在关闭的ApplicationContext
对象之前，先查看您的代码。或者实际上，您使用的try-with-resources块就是这样做的
public static void main(String[] args) {
    ClassC obj;
    try(AbstractApplicationContext appctx = new AnnotationConfigApplicationContext(ClassConfig.class)) {
        obj = (ClassC) appctx.getBean("classc");
    }
    Thread objThread = new Thread(obj);
    objThread.start();
}

基本上与
public static void main(String[] args) {
    ClassC obj;
    AbstractApplicationContext appctx = new AnnotationConfigApplicationContext(ClassConfig.class)) {
        obj = (ClassC) appctx.getBean("classc");

    appctx.close();

    Thread objThread = new Thread(obj);
    objThread.start();
}

在使用对象之前，您正在关闭ApplicationContext
。剩下的是一个ClassC
实例，其中提供了一个的半备份代理
，它需要上下文来查找某些bean。但是，当您从下面拉出注册表时，它无法查找这些bean
关闭ApplicationContext
时，您正在关闭应用程序。我希望您仍然存在的对象现在是无效的，因为它所属的容器已被销毁
将代码与JDBC代码进行比较。您正在打开一个连接
，关闭该连接，然后尝试在关闭的连接上准备一条语句。JDBC不允许这样做，因为连接已关闭，因此无效
将其与Microsoft Excel进行比较，打开它，在工作表中工作，编写宏。关闭excel并希望宏仍能运行。
删除资源试用。您正在用这个关闭上下文，从而清理几个后处理器。@M.Deinum，这是一个好的编程实践吗？让资源保持打开状态？因为Eclipse报告“资源泄漏：'appctx'从未关闭”。。。如果发生任何内存泄漏，我们是否应该实现其他内存泄漏修复代码？无论如何当我们在配置类中手动包含环境bean时，它被正确地注入。。。为什么会有这么多变化？。。。如果这是一个bean，而另一个组件等待它自动连接到一个字段，那么应该不惜任何代价让它可用。。。这就是DI和IOC的全部目的，对吗？是的，但是你在得到一个对象之后就关闭了DI容器。然后启动新线程来处理来自所述容器（现在已关闭或关闭）的对象。与JDBC相比，您正在关闭连接，然后尝试对所述连接执行查询。我不是说你不应该关闭上下文，但这里的问题是你在使用它之前就关闭了它。@M.Deinum，即使我在try with resources block中创建了线程，也会出现同样的问题……因为它仍然是关闭的。线程在后台运行，因此主线程不会等待。上下文仍在关闭或在您使用它时已关闭。请删除资源试用。您正在用这个关闭上下文，从而清理几个后处理器。@M.Deinum，这是一个好的编程实践吗？让资源保持打开状态？因为Eclipse报告“资源泄漏：'appctx'从未关闭”。。。如果发生任何内存泄漏，我们是否应该实现其他内存泄漏修复代码？无论如何当我们在配置类中手动包含环境bean时，它被正确地注入。。。为什么会有这么多变化？。。。如果这是一个bean，而另一个组件等待它自动连接到一个字段，那么应该不惜任何代价让它可用。。。这就是DI和IOC的全部目的，对吗？是的，但是你在得到一个对象之后就关闭了DI容器。然后启动新线程来处理来自所述容器（现在已关闭或关闭）的对象。与JDBC相比，您正在关闭连接，然后尝试对所述连接执行查询。我不是说你不应该关闭上下文，但这里的问题是你在使用它之前就关闭了它。@M.Deinum，即使我在try with resources block中创建了线程，也会出现同样的问题……因为它仍然是关闭的。线程在后台运行，因此主线程不会等待。上下文在您使用它时仍处于关闭状态。因此AnnotationCon