Question

我正在使用DB PostgreSQL创建一个Spring Boot应用程序。我的application.properties如下所示：

## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.url=jdbc:postgresql://localhost:5432/my-db
spring.datasource.username= myusername
spring.datasource.password= mypassword

# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect

# Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto = update

依赖项：

    <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>

简单模型：

@Entity
@Table(name = "questions")
@Data
public class Question {
    @Id
    @GeneratedValue(generator = "question_generator")
    @SequenceGenerator(
            name = "question_generator",
            sequenceName = "question_sequence",
            initialValue = 1000
    )
    private Long id;

    @NotBlank
    @Size(min = 3, max = 100)
    private String title;

    @Column(columnDefinition = "text")
    private String description;
}

存储库：

@Repository
public interface QuestionRepository extends JpaRepository<Question, Long> {
}

和控制器：

@RestController
public class QuestionController {

    @Autowired
    private QuestionRepository questionRepository;

    @GetMapping("/questions")
    public Page<Question> getQuestions(Pageable pageable) {
        return questionRepository.findAll(pageable);
    }
}

当我尝试运行该应用程序时，它引发了一个错误：

由以下原因引起：org.hibernate.exception.GenericJDBCException：无法   打开JDBC连接以执行DDL

原因：   org.postgresql.util.PSQLException：此结果集已关闭。

有人可以给我小费我在配置中做错了什么吗？非常感谢您！

无法使用SpringBoot + Postgresql打开用于DDL执行的JDBC连接

0 个答案: