我是SpringBoot的新手。我编写了一个示例服务，接受项目详细信息并将其存储在postgres数据库中。但是，我无法启动我的应用程序，也不确定是什么问题。我确实检查了包层次结构，一切似乎都没问题。任何帮助表示赞赏。
我没有在数据库中创建一个表，我在发送POST请求时通过JPA这样做。
package com.poc;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ProjectPocApiApplication {
public static void main(String[] args) {
SpringApplication.run(ProjectPocApiApplication.class, args);
}
}
package com.poc.project;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Project {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private String id;
@Id
private String name;
private String status;
private String priority;
private String manager;
private String comments;
public Project() {}
public Project(String id, String name, String status, String priority, String manager, String comments) {
super();
this.id = id;
this.name = name;
this.status = status;
this.priority = priority;
this.manager = manager;
this.comments = comments;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getPriority() {
return priority;
}
public void setPriority(String priority) {
this.priority = priority;
}
public String getManager() {
return manager;
}
public void setManager(String manager) {
this.manager = manager;
}
public String getComments() {
return comments;
}
public void setComments(String comments) {
this.comments = comments;
}
}
package com.poc.project;
import org.springframework.data.repository.CrudRepository;
public interface ProjectRepository extends CrudRepository<Project,String> {
public Project findByName(String name);
public void delete(String name);
}
package com.poc.project;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ProjectController {
@Autowired
private ProjectService projectService;
@RequestMapping(method=RequestMethod.GET, value="/projects")
public List<Project> getAllProjects(){
return projectService.getAllProjects();
}
@RequestMapping(method=RequestMethod.GET, value="/projects/{name}")
public Project getProject(@PathVariable String name){
return projectService.getProject(name);
}
@RequestMapping(method=RequestMethod.POST, value="/projects")
public void addProject(@RequestBody Project project){
projectService.addProject(project);
}
@RequestMapping(method=RequestMethod.POST, value="/projects/{name}")
public void updateProject(@RequestBody Project project, @PathVariable String name){
projectService.updateProject(name, project);
}
@RequestMapping(method=RequestMethod.GET, value="/projects/{name}")
public void deleteProject(@PathVariable String name){
projectService.deleteProject(name);
}
}
package com.poc.project;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class ProjectService {
@Autowired
private ProjectRepository projectRepository;
public List<Project> getAllProjects(){
List<Project> projects = new ArrayList<>();
projectRepository.findAll().forEach(projects::add);
return projects;
}
public Project getProject(String name) {
return projectRepository.findByName(name);
}
public void addProject(Project project){
projectRepository.save(project);
}
public void updateProject(String name, Project project) {
projectRepository.save(project);
}
public void deleteProject(String name) {
projectRepository.delete(name);
}
}
<?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.poc.project</groupId>
<artifactId>project-poc-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>project-poc-api</name>
<description>POC for Project Management Dashboard </description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.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-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498
at org.hibernate.engine.jdbc.env.internal.LobCreatorBuilderImpl.useContextualLobCreation(LobCreatorBuilderImpl.java:113) [hibernate-core-5.2.16.Final.jar:5.2.16.Final]
Caused by: java.sql.SQLFeatureNotSupportedException: Method org.postgresql.jdbc.PgConnection.createClob()
at org.postgresql.Driver.notImplemented(Driver.java:683)
at org.postgresql.jdbc.PgConnection.createClob(PgConnection.java:1252)
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'projectController': Unsatisfied dependency expressed through field 'projectService'; nested exception is org.springframework.beans.factory.
UnsatisfiedDependencyException: Error creating bean with name 'projectService': Unsatisfied dependency expressed through field 'projectRepository'; nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'projectRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.poc.project.Project
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'projectService':
Unsatisfied dependency expressed through field 'projectRepository'; nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'projectRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.poc.project.Project
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'projectRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.poc.project.Project
Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.poc.project.Project
答案 0 :(得分：-1)
您应该使用@Repository注释对存储库进行注释。