Java Spring @Service @Controller @Repository 错误：创建 bean 时出错
Java Spring error with @Service @Controller @Repository: Error creating bean
拜托，我需要一些帮助，我已经被这个错误困扰了 2 天。
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adsController': Unsatisfied dependency expressed through field 'shortUrlService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'shortUrlServiceImpl': Unsatisfied dependency expressed through field 'shortUrlRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shortUrlRepository' defined in com.codepressed.urlShortener.dao.ShortUrlRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property desc found for type LocalDateTime! Traversed path: ShortUrl.creationDate.
Error display
这是我的代码：
服务class
@Service
public class AdvertisementServiceImpl implements AdvertisementService{
@Autowired
AdvertisementRepository advertisementRepository;
@Autowired
private MongoUtilsService mongoUtilsService;
@Override
public Advertisement save(Advertisement advertisement) {
advertisement.set_id(mongoUtilsService.getNextValue("AD"));
return advertisementRepository.insert(advertisement);
}
@Override
public void removeAd(Advertisement advertisement) {
advertisementRepository.delete(advertisement);
}
@Override
public Advertisement randomAd() {
List<Advertisement> allAds = advertisementRepository.findAll();
Random random = new Random();
return allAds.get(random.nextInt(allAds.size()-1));
}
}
我的资料库
@RepositoryRestResource
public interface AdvertisementRepository extends MongoRepository<Advertisement,Long> {
}
控制器class
@Controller
@RequestMapping("/ad")
public class AdsController {
@Autowired
AdvertisementService advertisementService;
@Autowired
ShortUrlService shortUrlService;
@GetMapping(value="/{id}")
public String getRandomAd(@PathVariable Long id, Model model){
model.addAttribute("ad", advertisementService.randomAd());
String url;
if (shortUrlService.findUrlById(id) != null){
url = shortUrlService.findUrlById(id);
}else if (shortUrlService.findUrlByCustom(String.valueOf(id)) != null){
url = shortUrlService.findUrlByCustom(String.valueOf(id));
}else {
url = "/error404.html";
}
model.addAttribute("url", url);
return "go";
}
我想使用 ServiceImpl 和 Service，但我不知道为什么我不能自动装配它们。
此外，我在配置 Class 上有以下注释：
@ComponentScan({"com.codepressed.urlShortener", "com.codepressed.urlShortener.dao",
"com.codepressed.urlShortener.service", "com.codepressed.urlShortener.controller"})
但似乎还不够……
拜托，任何帮助表示赞赏，我看不到错误或我不明白。
GITHUB 回购：https://github.com/codepressed/Jurly/tree/master/src/main/java/com/codepressed/urlShortener
我刚刚在 github 上克隆了您的代码。
我发现你的方法命名不符合Spring-Data JPA规范。
重命名 ShortUrlRepository 方法：
List<ShortUrl> findFirst10ByCreationDateDesc();
至：
List<ShortUrl> findFirst10ByOrderByCreationDateDesc();
当这个问题解决后，运行应用程序，控制台输出：
No session repository could be auto-configured, check your configuration
所以我创建了一个 mongo http 会话配置：
package com.codepressed.urlShortener.config;
import org.springframework.context.annotation.Bean;
import org.springframework.session.data.mongo.JdkMongoSessionConverter;
import org.springframework.session.data.mongo.config.annotation.web.http.EnableMongoHttpSession;
import java.time.Duration;
@EnableMongoHttpSession
public class HttpSessionConfig {
@Bean
public JdkMongoSessionConverter jdkMongoSessionConverter() {
return new JdkMongoSessionConverter(Duration.ofMinutes(30));
}
}
然后我运行再次申请，没有异常输出！
2021-06-18 00:06:49.844 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : Starting UrlShortenerApplication using Java 11.0.10 on Mashiros-iMac.lan with PID 13960 (/Users/rat/IdeaProjects/Jurly/target/classes started by rat in /Users/rat/IdeaProjects/Jurly)
2021-06-18 00:06:49.850 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : No active profile set, falling back to default profiles: default
2021-06-18 00:06:50.295 INFO 13960 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2021-06-18 00:06:50.329 INFO 13960 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 32 ms. Found 2 MongoDB repository interfaces.
2021-06-18 00:06:50.667 INFO 13960 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-06-18 00:06:50.674 INFO 13960 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-06-18 00:06:50.674 INFO 13960 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.45]
2021-06-18 00:06:50.717 INFO 13960 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-06-18 00:06:50.718 INFO 13960 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 833 ms
2021-06-18 00:06:50.838 INFO 13960 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[127.0.0.1:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-06-18 00:06:50.875 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:1}] to 127.0.0.1:27017
2021-06-18 00:06:50.875 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:2}] to 127.0.0.1:27017
2021-06-18 00:06:50.876 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=127.0.0.1:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=9, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=11069828}
2021-06-18 00:06:51.052 INFO 13960 --- [ main] org.mongodb.driver.connection : Opened connection [connectionId{localValue:3, serverValue:3}] to 127.0.0.1:27017
2021-06-18 00:06:51.067 INFO 13960 --- [ main] o.s.s.d.m.AbstractMongoSessionConverter : Creating TTL index on field expireAt
2021-06-18 00:06:51.536 INFO 13960 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-06-18 00:06:51.600 INFO 13960 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2021-06-18 00:06:51.891 INFO 13960 --- [ main] .s.s.UserDetailsServiceAutoConfiguration :
Using generated security password: 1c0d09bd-73cc-42aa-8f6a-df157db252fe
2021-06-18 00:06:52.022 INFO 13960 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Will secure any request with [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@1e95f584, org.springframework.security.web.context.SecurityContextPersistenceFilter@1a336906, org.springframework.security.web.header.HeaderWriterFilter@39afe59f, org.springframework.security.web.csrf.CsrfFilter@3a3316b6, org.springframework.security.web.authentication.logout.LogoutFilter@57fce8b, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@1b4ba615, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@3a9c11fb, org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter@54997f67, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@18e8eb59, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@20f63ddc, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@24f177f5, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@bf4e48e, org.springframework.security.web.session.SessionManagementFilter@43756cb, org.springframework.security.web.access.ExceptionTranslationFilter@48ee3c2d, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@e6e5da4]
2021-06-18 00:06:52.105 INFO 13960 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-06-18 00:06:52.115 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : Started UrlShortenerApplication in 2.542 seconds (JVM running for 3.116)
我觉得你应该参考下面的教程：
拜托，我需要一些帮助，我已经被这个错误困扰了 2 天。
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adsController': Unsatisfied dependency expressed through field 'shortUrlService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'shortUrlServiceImpl': Unsatisfied dependency expressed through field 'shortUrlRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shortUrlRepository' defined in com.codepressed.urlShortener.dao.ShortUrlRepository defined in @EnableMongoRepositories declared on MongoRepositoriesRegistrar.EnableMongoRepositoriesConfiguration: Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property desc found for type LocalDateTime! Traversed path: ShortUrl.creationDate.
Error display
这是我的代码：
服务class
@Service
public class AdvertisementServiceImpl implements AdvertisementService{
@Autowired
AdvertisementRepository advertisementRepository;
@Autowired
private MongoUtilsService mongoUtilsService;
@Override
public Advertisement save(Advertisement advertisement) {
advertisement.set_id(mongoUtilsService.getNextValue("AD"));
return advertisementRepository.insert(advertisement);
}
@Override
public void removeAd(Advertisement advertisement) {
advertisementRepository.delete(advertisement);
}
@Override
public Advertisement randomAd() {
List<Advertisement> allAds = advertisementRepository.findAll();
Random random = new Random();
return allAds.get(random.nextInt(allAds.size()-1));
}
}
我的资料库
@RepositoryRestResource
public interface AdvertisementRepository extends MongoRepository<Advertisement,Long> {
}
控制器class
@Controller
@RequestMapping("/ad")
public class AdsController {
@Autowired
AdvertisementService advertisementService;
@Autowired
ShortUrlService shortUrlService;
@GetMapping(value="/{id}")
public String getRandomAd(@PathVariable Long id, Model model){
model.addAttribute("ad", advertisementService.randomAd());
String url;
if (shortUrlService.findUrlById(id) != null){
url = shortUrlService.findUrlById(id);
}else if (shortUrlService.findUrlByCustom(String.valueOf(id)) != null){
url = shortUrlService.findUrlByCustom(String.valueOf(id));
}else {
url = "/error404.html";
}
model.addAttribute("url", url);
return "go";
}
我想使用 ServiceImpl 和 Service，但我不知道为什么我不能自动装配它们。 此外，我在配置 Class 上有以下注释： @ComponentScan({"com.codepressed.urlShortener", "com.codepressed.urlShortener.dao", "com.codepressed.urlShortener.service", "com.codepressed.urlShortener.controller"}) 但似乎还不够…… 拜托，任何帮助表示赞赏，我看不到错误或我不明白。
GITHUB 回购：https://github.com/codepressed/Jurly/tree/master/src/main/java/com/codepressed/urlShortener
我刚刚在 github 上克隆了您的代码。
我发现你的方法命名不符合Spring-Data JPA规范。
重命名 ShortUrlRepository 方法：
List<ShortUrl> findFirst10ByCreationDateDesc();
至：
List<ShortUrl> findFirst10ByOrderByCreationDateDesc();
当这个问题解决后，运行应用程序，控制台输出：
No session repository could be auto-configured, check your configuration
所以我创建了一个 mongo http 会话配置：
package com.codepressed.urlShortener.config;
import org.springframework.context.annotation.Bean;
import org.springframework.session.data.mongo.JdkMongoSessionConverter;
import org.springframework.session.data.mongo.config.annotation.web.http.EnableMongoHttpSession;
import java.time.Duration;
@EnableMongoHttpSession
public class HttpSessionConfig {
@Bean
public JdkMongoSessionConverter jdkMongoSessionConverter() {
return new JdkMongoSessionConverter(Duration.ofMinutes(30));
}
}
然后我运行再次申请，没有异常输出！
2021-06-18 00:06:49.844 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : Starting UrlShortenerApplication using Java 11.0.10 on Mashiros-iMac.lan with PID 13960 (/Users/rat/IdeaProjects/Jurly/target/classes started by rat in /Users/rat/IdeaProjects/Jurly)
2021-06-18 00:06:49.850 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : No active profile set, falling back to default profiles: default
2021-06-18 00:06:50.295 INFO 13960 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2021-06-18 00:06:50.329 INFO 13960 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 32 ms. Found 2 MongoDB repository interfaces.
2021-06-18 00:06:50.667 INFO 13960 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-06-18 00:06:50.674 INFO 13960 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-06-18 00:06:50.674 INFO 13960 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.45]
2021-06-18 00:06:50.717 INFO 13960 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-06-18 00:06:50.718 INFO 13960 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 833 ms
2021-06-18 00:06:50.838 INFO 13960 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[127.0.0.1:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-06-18 00:06:50.875 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:1}] to 127.0.0.1:27017
2021-06-18 00:06:50.875 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:2}] to 127.0.0.1:27017
2021-06-18 00:06:50.876 INFO 13960 --- [127.0.0.1:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=127.0.0.1:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=9, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=11069828}
2021-06-18 00:06:51.052 INFO 13960 --- [ main] org.mongodb.driver.connection : Opened connection [connectionId{localValue:3, serverValue:3}] to 127.0.0.1:27017
2021-06-18 00:06:51.067 INFO 13960 --- [ main] o.s.s.d.m.AbstractMongoSessionConverter : Creating TTL index on field expireAt
2021-06-18 00:06:51.536 INFO 13960 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-06-18 00:06:51.600 INFO 13960 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2021-06-18 00:06:51.891 INFO 13960 --- [ main] .s.s.UserDetailsServiceAutoConfiguration :
Using generated security password: 1c0d09bd-73cc-42aa-8f6a-df157db252fe
2021-06-18 00:06:52.022 INFO 13960 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Will secure any request with [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@1e95f584, org.springframework.security.web.context.SecurityContextPersistenceFilter@1a336906, org.springframework.security.web.header.HeaderWriterFilter@39afe59f, org.springframework.security.web.csrf.CsrfFilter@3a3316b6, org.springframework.security.web.authentication.logout.LogoutFilter@57fce8b, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@1b4ba615, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@3a9c11fb, org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter@54997f67, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@18e8eb59, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@20f63ddc, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@24f177f5, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@bf4e48e, org.springframework.security.web.session.SessionManagementFilter@43756cb, org.springframework.security.web.access.ExceptionTranslationFilter@48ee3c2d, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@e6e5da4]
2021-06-18 00:06:52.105 INFO 13960 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-06-18 00:06:52.115 INFO 13960 --- [ main] c.c.u.UrlShortenerApplication : Started UrlShortenerApplication in 2.542 seconds (JVM running for 3.116)
我觉得你应该参考下面的教程：