应用程序启动期间的Spring Boot错误：x中的字段需要找不到类型'y'的bean

我在Spring Boot中收到以下错误：

APPLICATION FAILED TO START描述：com.example.demo.csis.service.impl.UserDaoImpl中的字段userRepository需要一个无法找到的类型为'com.example.demo.csis.dao.UserRepository'的bean . 操作：考虑在配置中定义类型为“com.example.demo.csis.dao.UserRepository”的bean .

我的代码如下：

com.example.demo.csis.dao.UserRepository.java

package com.example.demo.csis.dao;

import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import com.example.demo.csis.entity.User;
import org.springframework.stereotype.Service;

import java.util.List;

@Repository
public interface UserRepository extends CrudRepository<User, Long>
{
    public List<User> findByNameAndPassword(String USER_NAME, String PASSWORD);
}

com.example.demo.csis.service.impl.UserDaoImpl

package com.example.demo.csis.service.impl;

import java.util.List;

import com.example.demo.csis.dao.UserRepository;
import com.example.demo.csis.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserDaoImpl
{
    @Autowired
    private UserRepository userRepository;

    public boolean verifyUser(User user)
    {
        List<User> userList = userRepository.findByNameAndPassword(user.getUsername(), user.getPassword());
        return userList.size()>0;
    }
}

pom.xml

<?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.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.13.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jpa-data</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
            <version>2.0.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.0.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <version>RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

为什么Spring Boot要求我考虑在我的配置中定义'com.example.demo.csis.dao.UserRepository'类型的bean？我试图调整我的 runApplication 路径，但它仍然不起作用 .