Java org.springframework.beans.factory.unsatifiedpendencyException:创建名为（controller）的bean时出错

大家好，我正在做SpringMVC和hibernate项目

我一直在得到这个异常，我有

控制器类

和

DAO接口

和

DAO实现

我已经配置了所有东西，但无法追踪我的错误，请查看一下

HTTP Status 500 - Servlet.init() for servlet spring threw exception
 javax.servlet.ServletException: Servlet.init() for servlet spring threw exception
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Unknown Source)


root cause
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerController': Unsatisfied dependency expressed through field 'customerDAO': No qualifying bean of type [com.loveTodo.springPractice.dao.inter.CustomerDAO] found for dependency [com.loveTodo.springPractice.dao.inter.CustomerDAO]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.loveTodo.springPractice.dao.inter.CustomerDAO] found for dependency [com.loveTodo.springPractice.dao.inter.CustomerDAO]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:569)
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
    javax.servlet.GenericServlet.init(GenericServlet.java:158)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Unknown Source)


root cause
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.loveTodo.springPractice.dao.inter.CustomerDAO] found for dependency [com.loveTodo.springPractice.dao.inter.CustomerDAO]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1406)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1057)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566)
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776)
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
    javax.servlet.GenericServlet.init(GenericServlet.java:158)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Unknown Source

这是我的控制器类

package com.loveTodo.springPractice.controller;


import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

import com.loveTodo.springPractice.dao.inter.CustomerDAO;
import com.loveTodo.springPractice.entity.Customer;

@RestController  
@RequestMapping("/customer")
public class CustomerController   
{

    //need to inject the customer dao
    @Autowired
    private CustomerDAO customerDAO;

    @RequestMapping("/list")
    ModelAndView listCostomers(Model theModel)
    {
          //get the customers from the dao

        List<Customer> theCustomers=customerDAO.getCustomers();
        theModel.addAttribute("Customers",theCustomers);
        //add the customer to the modal
        return new ModelAndView("list-customers");

    }
}

请查看我的

实体类

package com.loveTodo.springPractice.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="customer")
public class Customer
{
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id")
    private int id;
    @Column(name="first_name")
    private String firstName;
    @Column(name="last_name")
    private String lastName;
    @Column(name="email")
    private String email;

    public Customer() {}

    public int getId() {
        return id;
    }

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

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public String toString() {
        return "Customer [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
    }


}

---

我在运行时不断遇到此异常，无法跟踪出错的地方请帮助我

spring未检测到CustomerDaoImpl，因为它未在xml配置中定义，也未包含在类路径扫描中

    <context:component-scan base-package="com.loveTodo.springPractice.controller" />

---

它说spring无法创建customerController，因为spring无法在customerDAO字段中提供一个依赖项，spring未检测到customerDAO类型的CustomerDaoImpl，因为它未定义xml配置，也未包含在类路径扫描中

    <context:component-scan base-package="com.loveTodo.springPractice.controller" />

---

它说spring不能创建customerController，因为它在customerDAO字段中有一个spring不能提供的依赖项，customerDAO属于customerDAO类型。基于xml上下文配置文件，包含应由spring扫描的DAO实现的包不包括在组件扫描标记中。如您所见，它只是包含控制器的软件包，因此更改此行：

<context:component-scan base-package="com.loveTodo.springPractice.controller" />

为此，可以解决问题：

<context:component-scan base-package="com.loveTodo.springPractice" />

---

基于xml上下文配置文件，包含应由spring扫描的DAO实现的包不包括在组件扫描标记中。如您所见，它只是包含控制器的软件包，因此更改此行：

<context:component-scan base-package="com.loveTodo.springPractice.controller" />

为此，可以解决问题：

<context:component-scan base-package="com.loveTodo.springPractice" />

你能试试这个

我现在在@Suganthan Madhavan pillacan尝试的同一个问题你能试试这个

我现在在@Suganthan Madhavan Pillaisorry尝试的同一个问题我没有得到我必须做的事情吗？这个问题已经解决了，但现在我得到了

java.lang.IllegalArgumentException:org.hibernate.hql.internal.ast.QuerySyntaxException:客户未映射[来自客户]

对不起，我没有得到我必须做的事情？问题已经解决，但现在我得到了

java.lang.IllegalArgumentException:org.hibernate.hql.internal.ast.QuerySyntaxException:客户未映射[来自客户]

现在我得到了这个org.hibernate.hql.internal.ast.QuerySyntaxException:Customer is not mapped@ali4jI需要更多关于您遇到的异常的详细信息，所以如果您首先搜索您遇到的异常，然后如果找不到任何答案，会好得多，你需要在新的帖子中提问。例如，这个链接可能很有用：是的，但我没有cfg文件，我在“springservlet.xml”中配置了所有内容，这正是我要说的文件。如果看看SpringIOC的一些基础知识，比如应用程序上下文的概念、bean定义和bean连接，这是一个好主意。同样，这篇文章对于理解ApplicationContex和ServletContext之间的区别也非常有用：我没有为实体扫描提供正确的包，现在很好@ali4j谢谢现在我得到了这个org.hibernate.hql.internal.ast.QuerySyntaxException:Customer未映射@ali4jI需要更多关于您遇到的异常的详细信息，所以如果您首先搜索您遇到的异常，那么如果您没有找到任何答案，你需要在新的帖子中提问。例如，这个链接可能很有用：是的，但我没有cfg文件，我在“springservlet.xml”中配置了所有内容，这正是我要说的文件。如果看看SpringIOC的一些基础知识，比如应用程序上下文的概念、bean定义和bean连接，这是一个好主意。另外，这篇文章对于理解ApplicationContex和ServletContext之间的区别非常有用：我没有为实体扫描提供正确的包，现在它很好@ali4j谢谢

<context:component-scan base-package="com.loveTodo.springPractice" />