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演示Springboot应用程序连接到Postgres数据库时抛出运行时嵌套异常

[英]Demo Springboot application to connect to postgres database throws runtime nested exception

 原文  2019-08-04 01:23:28  1   1    spring/ spring-boot/ spring-mvc

问题描述

我正在尝试编写一个演示程序以连接到postgres数据库并执行基本的CRUD操作。 运行应用程序时出现“ org.springframework.beans.factory.UnsatisfiedDependencyException”错误。 我是春天的新手。 非常感谢您的提前帮助。

TestApplication.java 

package com.ranjana.test;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;

@SpringBootApplication
@EntityScan(basePackages = {"model"})
public class TestApplication {

    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }
}

以下是模型：Employee.java 

package com.ranjana.test.model;

import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.UpdateTimestamp;
import javax.persistence.*;
import java.util.Date;

@Entity
public class Employee {
    //Employee Id
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    //Employee First Name
    @Column(name = "first_name", nullable = false)
    private String firstName;

    //Employee Last Name
    @Column(name = "last_name", nullable = false)
    private String lastName;

    //Employee Email Address
    @Column(name = "email", nullable = false)
    private String emailId;

    //Employee Contact Number
    @Column(name = "contact_number", nullable = false)
    private String contactNumber;

    //Creation Timestamp
    @CreationTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "create_date_time", nullable = false)
    private Date createDateTime;

    //Update Timestamp
    @UpdateTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "update_date_time", nullable = false)
    private Date updateDateTime;

    // Getters and setters

    @Override
    public String toString(){
        return  "Employee{"
                + "id = " + id + '\''
                + "firstName" + firstName + '\''
                + "lastName" + lastName + '\''
                + "email" + emailId + '\''
                + "phone" + contactNumber + '\''
                + "createDateTime" + createDateTime + '\''
                + "updateDateTime" + updateDateTime + '\''
                + "}";
    }
}

这是扩展JpaRepository的接口： 

package com.ranjana.test.repositoy;

import com.ranjana.test.model.Employee;
import org.springframework.data.jpa.repository.JpaRepository;

public interface EmployeeRepo extends JpaRepository <Employee, Long>{ }

最后是控制器： 

package com.ranjana.test.controller;

import com.ranjana.test.repositoy.EmployeeRepo;
import com.ranjana.test.exception.ResourceNotFoundException;
import com.ranjana.test.model.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/v1")
public class EmployeeController {
    @Autowired
    private EmployeeRepo empRepo;

    @GetMapping("/employees")
    public List<Employee> getAllEmployees(){
        return empRepo.findAll();
    }

    @GetMapping("/employee/{id}")
    public ResponseEntity<Employee> getUsersById(@PathVariable(value = "id") Long emplId)
        throws ResourceNotFoundException {
        Employee employee = empRepo.findById(emplId).orElseThrow(() -> new ResourceNotFoundException("Employee not found for id: " + emplId));
        return ResponseEntity.ok().body(employee);
    }

    @PostMapping("/employees")
    public Employee createEmployee(@Valid @RequestBody Employee employee){
        return empRepo.save(employee);
    }

    @PutMapping("/employee/{id}")
    public ResponseEntity<Employee> updateEmployee(@PathVariable(value = "id") Long emplId, @Valid @RequestBody Employee empDetails)
        throws ResourceNotFoundException{
        Employee employee = empRepo.findById(emplId).orElseThrow(() -> new ResourceNotFoundException("Employee not found for id: " + emplId ));
        employee.setFirstName(empDetails.getFirstName());
        employee.setLastName(empDetails.getLastName());
        employee.setEmailId(empDetails.getEmailId());
        employee.setContactNumber(empDetails.getContactNumber());
        employee.setUpdateDateTime(new Date());

        final Employee updatedEmployee = empRepo.save(employee);

        return ResponseEntity.ok(updatedEmployee);
    }

    @DeleteMapping("/employee/{id}")
    public Map<String, Boolean> deleteEmployee(@PathVariable(value = "id") Long emplId)
        throws Exception{
        Employee employee = empRepo.findById(emplId).orElseThrow(() -> new ResourceNotFoundException("Employee not found for id: " + emplId));
        empRepo.delete(employee);
        Map <String, Boolean> response= new HashMap<>();
        response.put("Deleted", Boolean.TRUE);
        return response;
    }

}

请找到错误日志，如下所示： 

2019-08-03 20:21:53.210 ERROR 7151 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'employeeController': Unsatisfied dependency expressed through field 'empRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.egen.test.model.Employee
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
    at com.egen.test.TestApplication.main(TestApplication.java:12) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.1.6.RELEASE.jar:2.1.6.RELEASE]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.egen.test.model.Employee
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    ... 24 common frames omitted
Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.egen.test.model.Employee
    at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:552) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
    at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:201) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:151) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:134) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:65) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:305) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:297) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:211) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.util.Lazy.get(Lazy.java:94) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:300) ~[spring-data-commons-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:121) ~[spring-data-jpa-2.1.9.RELEASE.jar:2.1.9.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    ... 34 common frames omitted


Process finished with exit code 0

1 个解决方案

解决方案1
 1 已采纳  2019-08-04 02:08:16

需要将此行@EntityScan(basePackages = {"model"})为@EntityScan(basePackages = {"com.ranjana.test.model"})以便您的应用程序从软件包名称正确扫描。

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