小编Pre*_*ric的帖子

我对 Spring 很陌生，我正在尝试弄清楚如何使用 @ElementCollection。

我有以下课程：

@Embeddable
public class Phone {
      private String type;
      private String areaCode;
      @Column(name="P_NUMBER")
      private String number;

    public Phone() {
    }

    public Phone(String type, String areaCode, String number) {
        super();
        this.type = type;
        this.areaCode = areaCode;
        this.number = number;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }


    public String getAreaCode() {
        return areaCode;
    }

    public void setAreaCode(String areaCode) {
        this.areaCode = areaCode;
    }

    public String getType() {
        return …

我对groovy很新,一般用java编写脚本,我真的希望有一个简单的解决方案来解决我的问题.在我们的应用程序中,用户可以执行他们自己编写的groovy脚本,我们需要控制这些脚本可以做什么和不能做什么.我读了很多关于沙盒groovy的东西,但要么我正在寻找错误的地方,要么我忽略了明显的问题.为简单起见,我有一个小例子来说明问题.这是我的类加载器,它应该阻止java.lang.System加载并可用于脚本:

public class MyClassLoader extends ClassLoader {

    @Override
    public Class<?> loadClass(String name) throws ClassNotFoundException {
        if (name.startsWith("java.lang.System")) {
            throw new ClassNotFoundException("Class not found: " + name);
        }
        return super.loadClass(name);
    }
}

这是一个试图调用的简单程序System.currentTimeMillis():

public static void main(String[] args) {
    String code = "java.lang.System.currentTimeMillis();";
    ClassLoader classLoader = new MyClassLoader();
    Thread.currentThread().setContextClassLoader(classLoader);

    GroovyShell shell = new GroovyShell();
    Script script = shell.parse(code);
    Object result = script.run();
    log.debug(result);
}

MyClassLoader为java.lang.SystemBeanInfo 和抛出异常java.lang.SystemCustomizer,但代码执行.如果我使用javax.script类,会发生同样的事情:

ScriptEngineManager factory = new ScriptEngineManager(); …

我在这里阅读了很多关于这种问题的内容,但似乎我的代码很好但是autowire不能正常工作:

Error creating bean with name 'optionController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private service.InteractionBanque controllers.OptionController.interactionBanque; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [service.InteractionBanque] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

这是我的控制器的代码:

package controllers;


package controllers;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import model.Banque;
import model.Client;
import service.InteractionBanque;
import serviceimpl.InteractionBanqueImpl;

@Controller …

尝试在我的applciation中配置spring数据时,我遇到了以下错误.我使用spring数据和EclipseLink,以及spring-security和oauth2.

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: org.springframework.beans.BeanUtils.findPropertyForMethod(Ljava/lang/reflect/Method;Ljava/lang/Class;)Ljava/beans/PropertyDescriptor;
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:417)
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:333)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:909)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:512)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1021)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:964)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:862)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:811)
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:739)
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1115)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:706)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at …

这是我的课程列表

@MappedSuperclass
public abstract class JpaModel {

    @Id
    @Column(name ="ID", columnDefinition = "serial")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
}

产品实体

@Entity
@Table(name = "REF_PRODUCT")
public class Product extends JpaModel{

    @Column(name= "NAME")
    private String name;

    @Column(name = "MANUFACTURER")
    private String manufacturer;

    /**
     * Work around for missing
     */
    @OneToOne(optional = true)
    @JoinColumn(name="id")
    private InventoryItemPicture picture;

.... }

和库存物品图片实体

@Entity
@Table(name = "TXN_INVENTORY_PICTURE")
public class InventoryItemPicture extends JpaModel{

    @Column
    private byte[] image;

    @Column
    private String fileName;

保存产品时，inventoryItemPicture 是可选的，因此有时它会是空值，这是我希望发生的事情。但是，在使用空值保存产品实体时，会出现此错误。

Caused by: org.postgresql.util.PSQLException: …

嗨，我有一张如下所示的两张桌子。

1) 任务 - id,name 2) 资源 - id,name,defaultTask(Task.id 的外键)

映射是一对多的——一个任务可以有很多资源。

Task 的代码如下所示。

@Entity
public class Task implements Serializable {
private long m_id;
private String m_name;

@Id
@GeneratedValue(
    strategy = GenerationType.AUTO
)
public long getId() {
    return this.m_id;
}

public void setId(long id) {
    this.m_id = id;
}

public String getName() {
    return this.m_name;
}

public void setName(String name) {
    this.m_name = name;
}

@OneToMany
@JoinColumn(
    name = "defaultTask"
)
private List<Resource> m_relatedResources;

public List<Resource> getrelatedResources() {
    return m_relatedResources;
} …