java - 组织.postgresql.util.PSQLException : FATAL: database "pma-springbootdb"

Question

我正在开发我的第一个 sprinboot 应用程序，我正在尝试在我的 sprinboot 应用程序中配置 postgreSQL 数据库的属性。当我运行此应用程序时，出现以下错误。

**org.postgresql.util.PSQLException: FATAL: database "pma-springbootdb" does not exist**
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2533) ~[postgresql-42.2.12.jar:42.2.12]
    at org.postgresql.core.v3.QueryExecutorImpl.readStartupMessages(QueryExecutorImpl.java:2645) ~[postgresql-42.2.12.jar:42.2.12]
    at org.postgresql.core.v3.QueryExecutorImpl.<init>(QueryExecutorImpl.java:138) ~[postgresql-42.2.12.jar:42.2.12]
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:255) ~[postgresql-42.2.12.jar:42.2.12]
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49) ~[postgresql-42.2.12.jar:42.2.12]
    at org.postgresql.jd
......
2020-06-03 09:33:13.052  WARN 1225 --- [         task-1] o.h.e.j.e.i.JdbcEnvironmentInitiator     : HHH000342: Could not obtain connection to query metadata : FATAL: database "pma-springbootdb" does not exist
2020-06-03 09:33:13.078  WARN 1225 --- [  restartedMain] ConfigServletWebServerApplicationContext : **Exception encountered during context initialization - cancelling refresh attempt: nested exception is org.springframework.beans.factory.BeanCreationException:** Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is **org.springframework.beans.BeanInstantiationException: Failed to instantiate** 
**Related cause: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'requestMappingHandlerAdapter'** defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Unsatisfied dependency expressed   : Invocation of destroy method failed on bean with name 'entityManagerFactory': org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
2020-06-03 09:33:13.079  INFO 1225 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService 'applicationTaskExecutor'
2020-06-03 09:33:13.084  INFO 1225 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2020-06-03 09:33:13.112  INFO 1225 --- [  restartedMain] ConditionEvaluationReportLoggingListener 
**Caused by: org.springframework.beans.factory.BeanCreationException:** Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeRepository' defined in com.jrp.pma.dao.EmployeeRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Cannot resolve reference to bean 'jpaMappingContext'

• PostgreSQL 特性

  spring.datasource.url=jdbc:postgresql://localhost:5432/pma-springbootdb

  spring.datasource.username=***
  
  spring.datasource.password=***
  
  spring.datasource.initialization-mode=never
  
  spring.jpa.hibernate.ddl-auto=none
  
  spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
  
  spring.jpa.show-sql=true
  spring.thymeleaf.cache=false
  version=3.0.0
  

• SQL 查询

  如果 employee_seq 不存在则创建序列；

  CREATE TABLE IF NOT EXISTS employee (
  
  employee_id BIGINT NOT NULL DEFAULT nextval('employee_seq') PRIMARY KEY,
  email VARCHAR(100) NOT NULL,
  first_name VARCHAR(100) NOT NULL,
  last_name VARCHAR(100) NOT NULL
  
  );
  
  CREATE SEQUENCE IF NOT EXISTS project_seq;
  
  CREATE TABLE IF NOT EXISTS project (
  
  project_id BIGINT NOT NULL DEFAULT nextval('project_seq') PRIMARY KEY,
  name VARCHAR(100) NOT NULL,
  stage VARCHAR(100) NOT NULL,
  description VARCHAR(500) NOT NULL
  
  );
  
  
  CREATE TABLE IF NOT EXISTS project_employee (
  
  project_id BIGINT REFERENCES project, 
  employee_id BIGINT REFERENCES employee
  
  );
  

• Project.java

   @Entity
      public class Project {
  
  @Id
      @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "project_seq")
  
  private Long projectId;
      ....
      ....
       }
  

  *

  • Employee.java

  *

  @Entity
  public class Employee {
  @Id
      @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "employee_seq")
      private long employeeId;
  ...
  ..
  }
  

Answer 1

消息 database "pma-springbootdb"does not exist 是不言自明的。

在 localhost 上运行的 PostgreSQL 实例中不存在此数据库，端口为 5432。要么是错误的数据库名称，要么是错误的实例。

请仔细检查:pma-springbootdb 与 pma-springbootbd