我把我的spring boot主类放在一个单独的包“config.init”中，并使用@ComponentScan注释来扫描所有其他类，但我得到的错误。我也尝试过使用@SpringBootApplication（scanBasePackages =“all packages”）注释，但是遇到了同样的问题。
2017-04-03 21:08:20.101 INFO 9784 --- [ost-startStop-1] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-04-03 21:08:20.220 INFO 9784 --- [ost-startStop-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2017-04-03 21:08:20.276 WARN 9784 --- [ost-startStop-1] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userRestController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.alokpanda.repository.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-04-03 21:08:20.277 INFO 9784 --- [ost-startStop-1] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2017-04-03 21:08:20.290 WARN 9784 --- [ost-startStop-1] o.s.boot.SpringApplication : Error handling failed (Error creating bean with name 'delegatingApplicationListener' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available)
2017-04-03 21:08:20.702 ERROR 9784 --- [ost-startStop-1] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field userRepository in com.alokpanda.service.impl.UserServiceImpl required a bean of type 'com.alokpanda.repository.UserRepository' that could not be found.
Action:
Consider defining a bean of type 'com.alokpanda.repository.UserRepository' in your configuration.
2017-04-03 21:08:20.715 ERROR 9784 --- [ina-startStop-1] org.apache.catalina.core.ContainerBase : A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SpringLogin]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122) [na:1.8.0_121]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) [na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872) [catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [catalina.jar:8.5.13]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [catalina.jar:8.5.13]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SpringLogin]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [catalina.jar:8.5.13]
... 6 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userRestController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.alokpanda.repository.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:151) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:131) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:86) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) ~[catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
... 6 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.alokpanda.repository.UserRepository' 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:588) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 28 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.alokpanda.repository.UserRepository' 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.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 41 common frames omitted
2017-04-03 21:08:20.717 ERROR 9784 --- [ main] org.apache.catalina.core.ContainerBase : A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[na:1.8.0_121]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) [catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) [catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
at org.apache.catalina.startup.Catalina.start(Catalina.java:655) [catalina.jar:8.5.13]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355) [bootstrap.jar:8.5.13]
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495) [bootstrap.jar:8.5.13]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) [catalina.jar:8.5.13]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) ~[catalina.jar:8.5.13]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_121]
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872) ~[catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.5.13]
... 6 common frames omitted
2017-04-03 21:08:20.718 ERROR 9784 --- [ main] org.apache.catalina.startup.Catalina : The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[catalina.jar:8.5.13]
at org.apache.catalina.startup.Catalina.start(Catalina.java:655) ~[catalina.jar:8.5.13]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355) [bootstrap.jar:8.5.13]
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495) [bootstrap.jar:8.5.13]
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793) ~[catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[catalina.jar:8.5.13]
... 7 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) ~[catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[catalina.jar:8.5.13]
... 9 common frames omitted
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:947) ~[catalina.jar:8.5.13]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[catalina.jar:8.5.13]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[catalina.jar:8.5.13]
... 11 common frames omitted
2017-04-03 21:08:20.719 INFO 9784 --- [ main] org.apache.coyote.ajp.AjpNioProtocol : Pausing ProtocolHandler ["ajp-nio-8009"]
2017-04-03 21:08:20.719 INFO 9784 --- [ main] o.apache.catalina.core.StandardService : Stopping service Catalina
2017-04-03 21:08:20.723 INFO 9784 --- [ main] org.apache.coyote.ajp.AjpNioProtocol : Destroying ProtocolHandler ["ajp-nio-8009"]
我的班级结构
classes and packages structure
spring boot web初始化程序类
package com.alokpanda.config.init;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
public class ServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SpringLoginApplication.class);
}
}
spring boot main class
package com.alokpanda.config.init;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan({"com.alokpanda.config.init", "com.alokpanda.controller.rest", "com.alokpanda.repository", "com.alokpanda.service.impl"})
public class SpringLoginApplication {
public static void main(String[] args) {
SpringApplication.run(SpringLoginApplication.class, args);
}
}
UserRestController
package com.alokpanda.controller.rest;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.alokpanda.model.User;
import com.alokpanda.service.UserService;
@RestController
@RequestMapping("/api")
public class UserRestController {
@Autowired
UserService userService;
@GetMapping("/users")
@Transactional(readOnly=true)
public List<User> onGetRequest() {
return userService.getAllUsers();
}
}
用户（模特类）
package com.alokpanda.model;
import java.io.Serializable;
import java.sql.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Past;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
@Entity
public class User implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Min(0)
@Column(name="ID", length=10)
private Integer id;
@Size(min=2, max=50)
@Pattern(regexp="[a-zA-Z0-9\\s]+")
@NotNull
@Column(name="NAME", length=50, nullable=false)
private String name;
@Size(min=1, max=1)
@Column(name="GENDER")
private String gender;
@Past
@Column(name="DATE_OF_BIRTH", nullable=true)
private Date dob;
@Size(min=5, max=50)
@Column(name="EMAIL", length=50, nullable=false)
private String email;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", gender=" + gender + ", dob=" + dob + ", email=" + email + "]";
}
public User() {
super();
}
public User(Integer id, String name, String gender, Date dob, String email) {
super();
this.id = id;
this.name = name;
this.gender = gender;
this.dob = dob;
this.email = email;
}
}
UserRepository
package com.alokpanda.repository;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.alokpanda.model.User;
@Repository
public interface UserRepository extends CrudRepository<User, Integer> {
//Entity class (User) and entity class id type (Integer)
}
UserService
package com.alokpanda.service;
import java.util.List;
import com.alokpanda.model.User;
public interface UserService {
public List<User> getAllUsers();
}
UserServiceImpl
package com.alokpanda.service.impl;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.alokpanda.model.User;
import com.alokpanda.repository.UserRepository;
import com.alokpanda.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserRepository userRepository;
@Override
public List<User> getAllUsers() {
List<User> list = new ArrayList<User>();
userRepository.findAll()
.forEach(list :: add);
return list;
}
}
application.properties
spring.datasource.url= jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.jpa.hibernate.ddl-auto=create
security.basic.enabled=false
答案 0 :(得分：0)
您有两种可能性：
在@SpringBootApplication中配置包：
@SpringBootApplication("com.alokpanda")
或添加以下内容以在正确的包中启用JPA存储库扫描：
@EnableJpaRepositories("com.alokpanda")
如果在@SpringBootApplication中指定包，Spring Boot将为所有必要的扫描配置包（这包括JPA存储库，组件扫描，实体扫描）。如果您只在@ComponentScan中指定包，则必须指定其他注释才能生效。