此刻我正在学习Spring Boot。我正在尝试使用Spring Data Jpa在mysql表中插入一些数据。当我尝试创建自动装配库界面时，在运行应用程序时遇到此问题。
我在ReflectionUtils类中遇到此错误：
Error creating bean with name 'frontcontroller': Unsatisfied dependency expressed through field 'databaseaction'
在我的控制台中，我收到此错误：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.19.RELEASE)
2019-03-26 17:38:54.761 INFO 5744 --- [ main] com.example.demo3.Demo3Application : Starting Demo3Application on IT-85 with PID 5744 (E:\RapidJava\SpringBootProject\demo-3\target\classes started by Nagaraju in E:\RapidJava\SpringBootProject\demo-3)
2019-03-26 17:38:54.779 INFO 5744 --- [ main] com.example.demo3.Demo3Application : No active profile set, falling back to default profiles: default
2019-03-26 17:38:54.890 INFO 5744 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@d554c5f: startup date [Tue Mar 26 17:38:54 IST 2019]; root of context hierarchy
2019-03-26 17:38:56.515 INFO 5744 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$4b71926e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-03-26 17:38:56.998 INFO 5744 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2019-03-26 17:38:57.042 INFO 5744 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-03-26 17:38:57.042 INFO 5744 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.37
2019-03-26 17:38:57.243 INFO 5744 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2019-03-26 17:38:57.247 INFO 5744 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-03-26 17:38:57.247 INFO 5744 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2360 ms
2019-03-26 17:38:57.458 INFO 5744 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2019-03-26 17:38:57.463 INFO 5744 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-03-26 17:38:57.463 INFO 5744 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-03-26 17:38:57.464 INFO 5744 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2019-03-26 17:38:57.464 INFO 5744 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2019-03-26 17:38:57.590 WARN 5744 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'frontcontroller': Unsatisfied dependency expressed through field 'databaseaction'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'databaseaction': Cannot create inner bean '(inner bean)#7c9bdee9' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#7c9bdee9': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available
2019-03-26 17:38:57.593 INFO 5744 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2019-03-26 17:38:57.841 INFO 5744 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2019-03-26 17:38:57.904 ERROR 5744 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field databaseaction in com.example.demo3.controller.Frontcontroller required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
如何纠正此问题。我正在使用IDE STS-4
源代码：
控制器类：
package com.example.demo3.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.example.demo3.model.usermodel;
import com.example.demo3.repository.Databaseaction;
@Controller
public class Frontcontroller {
@Autowired
Databaseaction databaseaction;
@RequestMapping("/")
public String getreq() {
System.out.println("method called");
return "index";
}
@RequestMapping(value = "save", method = RequestMethod.POST)
public ModelAndView save(usermodel user) {
ModelAndView mv = new ModelAndView();
try {
databaseaction.save(user);
System.out.println(user);
System.out.println(user.getFname());
System.out.println(user.getLname());
System.out.println(user.getEmail());
System.out.println(user.getMobNo());
System.out.println(user.getAddress());
} catch (Exception e) {
System.out.println("");
}
return mv;
}
}
模型类：
package com.example.demo3.model;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class usermodel {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int ID;
private String Fname;
private String Lname;
private String Email;
private String MobNo;
private String Address;
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
public String getFname() {
return Fname;
}
public void setFname(String fname) {
Fname = fname;
}
public String getLname() {
return Lname;
}
public void setLname(String lname) {
Lname = lname;
}
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
public String getMobNo() {
return MobNo;
}
public void setMobNo(String mobNo) {
MobNo = mobNo;
}
public String getAddress() {
return Address;
}
public void setAddress(String address) {
Address = address;
}
}
存储库接口：（这里我尝试了@ Repository，@ Service，@ Component一切）
package com.example.demo3.repository;
import org.springframework.data.repository.CrudRepository;
import com.example.demo3.model.usermodel;
public interface Databaseaction extends CrudRepository<usermodel, Integer> {
}
application.properties：
spring.mvc.view.prefix=/pages/
spring.mvc.view.suffix=.jsp
spring.jpa.hibernate.ddl-auto=update
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/learningspring
spring.datasource.username=root
spring.datasource.password=""