我的应用程序正在运行，但控制台中未显示任何有关映射的信息。我的Application类文件位于控制器之上，并且还添加了@ComponentScan（basePackages：“ com.org.name.controller”）来扫描控制器。控制台中仍未显示任何映射。我在控制器类中注释了@Autowired，因为我遇到了错误：
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-07-12 11:05:16.014 ERROR 14104 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userService in com.homzhub.lms.controller.UserController required a bean of type 'com.homzhub.lms.service.UserService' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'com.homzhub.lms.service.UserService' in your configuration.
主类：
package com.homzhub.lms;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan(basePackages = {"com.homzhub.lms.controller"})
//@EnableJpaRepositories("repository")
//@EnableAutoConfiguration
public class LmsApplication{
public static void main(String[] args){
SpringApplication.run(LmsApplication.class, args);
}
}
约会控制器：
package com.homzhub.lms.controller;
import java.security.Principal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.homzhub.lms.entity.Appointment;
import com.homzhub.lms.entity.User;
import com.homzhub.lms.service.AppointmentService;
import com.homzhub.lms.service.UserService;
@Controller
@RequestMapping(path = "/appointment")
public class AppointmentController {
// @Autowired
private AppointmentService appointmentService;
//@Autowired
private UserService userService;
@RequestMapping(value = "/create", method = RequestMethod.GET)
public void createAppointment(Model model) {
Appointment appointment = new Appointment();
model.addAttribute("appointment", appointment);
model.addAttribute("dateString", "");
}
@RequestMapping(value = "/create", method = RequestMethod.POST)
public String createAppointmentPost(@ModelAttribute("appointment") Appointment appointment, @ModelAttribute("dateString") String date, Model model, Principal principal) throws ParseException {
SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd hh:mm");
Date d1 = format1.parse(date);
appointment.setDate(d1);
User user = userService.findByUsername(principal.getName());
appointment.setUser(user);
appointmentService.createAppointment(appointment);
return "redirect:/userFront";
}
}
pom.xml文件：
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<!-- <version>1.5.21.RELEASE</version> -->
<version>2.1.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.homzhub</groupId>
<artifactId>lms</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>lms</name>
<description>Lead Management System</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
控制台输出。在控制器类中将@Autowired注释掉后，该应用程序将运行，但未完成映射：
2019-07-12 12:58:04.638 INFO 18828 --- [ main] com.homzhub.lms.LmsApplication : Starting LmsApplication v0.0.1-SNAPSHOT on rms-Lenovo-ideapad-330-15IKB with PID 18828 (/home/rms/lms/target/lms-0.0.1-SNAPSHOT.jar started by rms in /home/rms/lms)
2019-07-12 12:58:04.644 INFO 18828 --- [ main] com.homzhub.lms.LmsApplication : No active profile set, falling back to default profiles: default
2019-07-12 12:58:05.941 INFO 18828 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-07-12 12:58:06.161 INFO 18828 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 204ms. Found 13 repository interfaces.
2019-07-12 12:58:06.849 INFO 18828 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$d931452d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-07-12 12:58:07.301 INFO 18828 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-07-12 12:58:07.350 INFO 18828 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-07-12 12:58:07.350 INFO 18828 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.21]
2019-07-12 12:58:07.484 INFO 18828 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-07-12 12:58:07.484 INFO 18828 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2751 ms
2019-07-12 12:58:07.952 INFO 18828 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2019-07-12 12:58:08.286 INFO 18828 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2019-07-12 12:58:08.388 INFO 18828 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2019-07-12 12:58:08.519 INFO 18828 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.3.10.Final}
2019-07-12 12:58:08.521 INFO 18828 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2019-07-12 12:58:08.773 INFO 18828 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-07-12 12:58:09.175 INFO 18828 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2019-07-12 12:58:10.967 INFO 18828 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-07-12 12:58:12.284 INFO 18828 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-07-12 12:58:12.364 WARN 18828 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2019-07-12 12:58:12.923 INFO 18828 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2019-07-12 12:58:13.211 INFO 18828 --- [ main] .s.s.UserDetailsServiceAutoConfiguration :
Using generated security password: f1e93a8f-d01a-4050-8724-87ff348fab02
2019-07-12 12:58:13.388 INFO 18828 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: any request, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@1dcca8d3, org.springframework.security.web.context.SecurityContextPersistenceFilter@6daf2337, org.springframework.security.web.header.HeaderWriterFilter@70e3f36f, org.springframework.security.web.csrf.CsrfFilter@3c7cfcbb, org.springframework.security.web.authentication.logout.LogoutFilter@7d755813, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@4e25147a, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@60e5272, org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter@5631962, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@56303475, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@250b236d, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@432034a, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@52a70627, org.springframework.security.web.session.SessionManagementFilter@23e44287, org.springframework.security.web.access.ExceptionTranslationFilter@1bfe3203, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@71870da7]
2019-07-12 12:58:13.517 INFO 18828 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-07-12 12:58:13.520 INFO 18828 --- [ main] com.homzhub.lms.LmsApplication : Started LmsApplication in 9.518 seconds (JVM running for 10.158)
UserService类：
package com.homzhub.lms.service;
import java.util.List;
import java.util.Set;
import org.springframework.stereotype.Service;
import com.homzhub.lms.entity.User;
import com.homzhub.lms.security.UserRole;
//@Service("userDetailsService")
@Service
public interface UserService{
User findByUsername(String username);
User findByEmail(String email);
// User findByPhoneNumber(String phoneNumber);
boolean checkUserExists(String username, String email);
boolean checkUsernameExists(String username);
boolean checkEmailExists(String email);
void save(User user);
User createUser(User user, Set<UserRole> userRoles);
User saveUser(User user);
List<User> findUserList();
void enableUser(String username);
void disableUser(String username);
}
答案 0 :(得分：0)
如果尚未定义，则需要将UserService定义为组件，或更恰当的定义为服务。如果已经存在，则必须对其进行映射，考虑到Spring应该自己进行操作，这有点奇怪。
答案 1 :(得分：0)
您仅扫描com.homzhub.lms.controller，而UserService不在ComponentScan下。
您需要将服务包添加到ComponentScan
@ComponentScan(basePackages = {"com.homzhub.lms"})
答案 2 :(得分：0)
您的服务位于com.homzhub.lms.service包下，因此您也必须将该包添加到@ComponentScan中，因此Spring也会扫描该包并在其中拾取标有构造型的类：
@SpringBootApplication
@ComponentScan(basePackages = {"com.homzhub.lms.controller, "com.homzhub.lms.service"})
public class LmsApplication{
public static void main(String[] args){
SpringApplication.run(LmsApplication.class, args);
}
}
但是，我看到带有@SpringBootApplication注释的类已经位于带有组件的所有程序包之上，因此您完全可以摆脱@ComponentScan注释。因此，默认情况下它将扫描嵌套的软件包。
还要记住用Spring构造型注释（例如@Service注释服务类），以便组件扫描能够拾取它们。
答案 3 :(得分：0)
取消注释@Autowired注释。将@Service注释放在实现类而不是接口上，并确保可以通过componentScan发现实现类。
此外，作为补充，Spring将扫描您的主类（带有@SpringBootApplication注释的类）的所有子包。因此，最好将目录结构设为com.homzhub.lms作为根，将com.homzhub.lms.controller用作控制器，将com.homzhub.lms.service用于服务，将com.homzhub.lms.service.impl保留在目录中。不同的包装。
componentScan。