sping注解无法实例对象，麻烦大神给看下。

[湖东路59号人]

错误信息：org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sparePartsOutInRecordAction' defined in file [D:\workspace_crm\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\fpi\WEB-INF\classes\com\fpi\crm\engineering\action\SparePartsOutInRecordAction.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.fpi.crm.engineering.action.SparePartsOutInRecordAction]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:965)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.fpi.crm.engineering.action.SparePartsOutInRecordAction]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:74)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:958)
... 28 more
Caused by: java.lang.NullPointerException
at org.apache.struts2.ServletActionContext.getRequest(ServletActionContext.java:112)
at com.keepsoft.system.common.SystemContext.getRequest(SystemContext.java:95)
at com.keepsoft.system.common.base.action.BaseAction.<init>(BaseAction.java:38)
at com.fpi.crm.engineering.action.SparePartsOutInRecordAction.<init>(SparePartsOutInRecordAction.java:16)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

实体类部分代码：
@Entity
@Table(name = "tb_crm_SparePartsOutInRecord")
public class SparePartsOutInRecord {
@Id
@GeneratedValue
private Integer id;
private Date uploadDate;//上传日期
@ManyToOne
@JoinColumn(name = "uploadUser_id")
private User uploadUser;//上传人员
private String sparePartsLibraryName;//备件库名称
private Integer delFlag=0;//是否删除

public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Date getUploadDate() {
.........

控制器部分代码：
@Component(value="sparePartsOutInRecordAction")
public class SparePartsOutInRecordAction extends BaseAction{

private static final long serialVersionUID = 1L;
@Autowired
private SparePartsOutInRecordBo sparePartsOutInRecordBo;
private SparePartsOutInRecord sparePartsOutInRecord;

public String toView() {
return SUCCESS;
}

public String uploadSparePartsLibrary() {
return SUCCESS;
}

public String downloadSparePartsLibrary() {
return SUCCESS;
。。。。。。。。

BO类部分代码：
@Component(value="sparePartsOutInRecordBo")
public class SparePartsOutInRecordBo extends BaseControlBoImpl<SparePartsOutInRecord> {

public void toView() {

}

public void uploadSparePartsLibrary() {

}

[湖东路59号人]

baseaction里面也没有重写构造器的，都是自己默认的构造器，baseaction就是一个基本的对请求进行封装 BaseAction extends ActionSupport implements Preparable

[风马博客]

..Spring里面有配置扫描吗？ 导入service层注解加全了吗

[detoAndy]

首先，要检查配置文件有没有对， <context:component-scan base-package="" />扫描指定包并注解

[湖东路59号人]

根据报错信息得知：1、org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sparePartsOutInRecordAction' defined----sparePartsOutInRecordAction这个对象在实例化的时候出现的异常 2、Could not instantiate bean class [com.fpi.crm.engineering.action.SparePartsOutInRecordAction]: Constructor threw exception; nested exception is java.lang.NullPointerException-----------这行得知是构造器异常，可是我类里面根本就没有重写构造器，它默认用的应该是默认构造器，这个不能创建该实力并报空指针该如何理解？

[Intboy]

BaseAction有构造器吧，子类写个无参构造器