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UnsatisfiedDependencyException： 'homeController'という名前のBeanの作成エラー：フィールド 'userDAO'で表現された、満たされていない依存関係

私は、Eclipse Spring Mavenの2つの別々のプロジェクトをバックエンドとフロントエンドに接続しようとしています。そのために依存関係を追加しました。しかし、Homecontroller.Javaで資格情報の検証ロジックを書き留めると、サーバーで実行した後、この例外が表示されます。それを解決するのを助けてください私はすでに多くの方法を試しました提案してください。

HomeController.Java

package com.yogesh.shoponlinefrontend.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Required;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.yogesh.shoponlineback.dao.UserDAO;
import com.yogesh.shoponlineback.model.User;

@Controller
public class HomeController {


@Autowired
UserDAO userDAO;


@RequestMapping("/")
public String homePage() {
    System.out.println("Executing  the method homePage");
    return "home";
}

@RequestMapping("/login")
public ModelAndView showLoginPage() {

    ModelAndView mv = new ModelAndView("home");
    mv.addObject("msg", "You clicked login link");
    mv.addObject("showLoginPage", "true");
    return mv;
}

@RequestMapping("/register")
public ModelAndView showRegistrationPage() {
    ModelAndView mv = new ModelAndView("home");

    mv.addObject("msg", "You clicked Registration link ");

    mv.addObject("showRegistrationPage", "true");

    return mv;
}

@RequestMapping("/validate")
public ModelAndView validate(@RequestParam("id") String id, @RequestParam("password") String pwd) {
    System.out.println("In validate method");
    System.out.println("id: " + id);
    System.out.println("pwd: " + pwd);
    ModelAndView mv = new ModelAndView("home");

    if (userDAO.validate(id, pwd) != null) {
        mv.addObject("successMsg", "You logged in successfully");
    } else {
        mv.addObject("errorMsg", "Invalid Credentials..Please try again");
    }

    return mv;
}

}

serDAO.Java

package com.yogesh.shoponlineback.dao;

import Java.util.List;

import com.yogesh.shoponlineback.model.User;

public interface UserDAO {

public List<User> list();

public User get(String username);

public User validate(String username, String password);

public boolean save(User user);

public boolean update(User user);
}

User.Java

package com.yogesh.shoponlineback.model;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;

import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.stereotype.Component;

@Entity
//cha
@Table(name="USER")  
@Component
public class User {

@Id
private String username;

@NotEmpty(message = "please enter your name")
private String name;

@Min(5)
@Max(15)
private String password;
private String mobile;
private String role;

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getName() {
    return name;
}

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

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}


public String getMobile() {
    return mobile;
}

public void setMobile(String mobile) {
    this.mobile = mobile;
}

public String getRole() {
    return role;
}

public void setRole(String role) {
    this.role = role;
}

}

serDAOImpl.Java

package com.yogesh.shoponlineback.daoimpl;

import Java.util.List;


import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.yogesh.shoponlineback.dao.UserDAO;
import com.yogesh.shoponlineback.model.User;

@Service
@Repository()
public class UserDAOImpl implements UserDAO {


@Autowired
UserDAO userDAO;

@Autowired
private SessionFactory sessionFactory;
public UserDAOImpl(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}

public UserDAOImpl() {
    // TODO Auto-generated constructor stub
}

@Transactional
public List<User> list() {
    String hql = "from User";
    Query query = sessionFactory.getCurrentSession().createQuery(hql);
    return query.list();
}

@Transactional
public User get(String username) {
    return (User) sessionFactory.getCurrentSession().get(User.class, username);
}

@Transactional
public  User validate(String username, String password) {
    String hql = "from User WHERE username ='" + username + "' and password='" + password + "'";
    Query query = sessionFactory.getCurrentSession().createQuery(hql);
    return (User)query.uniqueResult();
}

@Transactional
public boolean save(User user) {
    try {
        sessionFactory.getCurrentSession().save(user);
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }

    return true;
}

@Transactional
public boolean update(User user) {
    try {
        sessionFactory.getCurrentSession().update(user);
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

}

::::::::::::::::::::::::::::: 例外トレース :::::::::::: ::::::::::::::::::::::

INFO: FrameworkServlet 'dispatcher': initialization started
Jan 10, 2017 3:19:22 PM **org.springframework.web.context.support.AnnotationConfigWebApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'dispatcher-servlet': startup date [Tue Jan 10 15:19:22 IST 2017]; root of context hierarchy
Jan 10, 2017 3:19:22 PM org.springframework.web.context.support.AnnotationConfigWebApplicationContext loadBeanDefinitions
INFO: Registering annotated classes: [class com.yogesh.shoponlinefrontend.config.AppConfig]
Jan 10, 2017 3:19:23 PM org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor <init>
INFO: JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
Jan 10, 2017 3:19:23 PM org.springframework.web.context.support.AnnotationConfigWebApplicationContext refresh
WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'homeController': Unsatisfied dependency expressed through field 'userDAO'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.yogesh.shoponlineback.dao.UserDAO' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Jan 10, 2017 3:19:23 PM org.springframework.web.servlet.DispatcherServlet initServletBean
SEVERE: Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'homeController': Unsatisfied dependency expressed through field 'userDAO'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.yogesh.shoponlineback.dao.UserDAO' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.Java:592)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.Java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.Java:370)
    at `enter code here`org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.Java:1219)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.Java:551)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.Java:482)
    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:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.Java:754)
    at** org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.Java:866)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.Java:542)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.Java:668)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.Java:540)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.Java:494)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.Java:136)
    at javax.servlet.GenericServlet.init(GenericServlet.Java:158)
    at org.Apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.Java:1183)
    at org.Apache.catalina.core.StandardWrapper.load(StandardWrapper.Java:992)
    at org.Apache.catalina.core.StandardContext.loadOnStartup(StandardContext.Java:4903)
springexceptiondependencies
4
Yogesh Devgun

私は同じ問題を抱えていました！ POMファイルが正しく構成されていません。依存関係（バージョン）を確認してください。この構成は私にとってはうまくいきます。

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.Apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.Apache.org/POM/4.0.0 http://maven.Apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.stoliarenko</groupId>
    <artifactId>CustomerTracker</artifactId>
    <version>0.0.1-SNAPSHOT</version>
<!--    <version>1.0-SNAPSHOT</version>-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.Apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <packaging>war</packaging>

    <properties>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <spring.version>5.1.0.RELEASE</spring.version>
        <hibernate.version>5.3.5.Final</hibernate.version>
        <hibernate.validator>5.4.1.Final</hibernate.validator>
        <c3p0.version>0.9.5.2</c3p0.version>
        <jstl.version>1.2.1</jstl.version>
        <tld.version>1.1.2</tld.version>
        <servlets.version>3.1.0</servlets.version>
        <jsp.version>2.3.1</jsp.version>
        <hsqldb.version>1.8.0.10</hsqldb.version>
    </properties>



    <dependencies>
        <!-- Spring MVC Dependency -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Spring ORM -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Hibernate Core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.17.Final</version>
        </dependency>
        <!-- Hibernate Validator -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>${hibernate.validator}</version>
        </dependency>
        <!-- JSTL Dependency -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>javax.servlet.jsp.jstl-api</artifactId>
            <version>${jstl.version}</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>${tld.version}</version>
        </dependency>

        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlets.version}</version>
            <scope>provided</scope>
        </dependency>
        <!-- JSP Dependency -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>${jsp.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-Java</artifactId>
            <version>5.1.47</version>
        </dependency>
    </dependencies>
</project>
0
Nikolai Stoliarenko