在Spring Boot中获取异常

Question

我在练习Spring靴。我已经从git repo下载了Spring Boot代码，并将其导入到InteliJ IDEA上。在执行spring boot应用程序时，我得到了以下异常。你对此有什么想法吗？这是我的pom.xml

<?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>rc</groupId>
    <artifactId>note-it-api</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>

    <name>noteit</name>
    <!-- <text>Demo project for Spring Boot</text>-->

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.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>10</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-mail</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</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>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

org.springframework.beans.factory.beanCreationException：创建类路径资源[org/springframework/boot/autocconfigure/orm/jpa/hibernatejpaconfiguration.class]中定义的名为“Entity ManagerFactory”的bean时出错：调用init方法失败；嵌套异常为javax.persistence.persistenceException：[persistenceUnit:default]无法构建Hibernate SessionFactory；嵌套异常为org.hibernate.mappingException：无法在org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializeBean（abstractautowirecapablebeanfactory.java:1699)~[spring-beans-5.0.8.release.jar]~[spring-beans-5.0.8.release.docreateBean（S-5.0.8.release.jar:5.0.8.release]在org.springframework.beans.factory.support.abstractbeanfactory.java:315)~[spring-beans-5.0.8.release.jar:5.0.8.release]在org.springframework.beans.factory.support.abstractbeanfactory.java:199)~[spring-beans-5.0.8.release.jar:5.0.8.release]在

Answer 1

您需要将数据库设置添加到application.properties，因为您使用的是Spring-Data-JPA，
例如：

# JPA (JpaBaseConfiguration, HibernateJpaAutoConfiguration)
spring.data.jpa.repositories.bootstrap-mode=default # Bootstrap mode for JPA repositories.
spring.data.jpa.repositories.enabled=true # Whether to enable JPA repositories.
spring.jpa.database= # Target database to operate on, auto-detected by default. Can be alternatively set using the "databasePlatform" property.
spring.jpa.database-platform= # Name of the target database to operate on, auto-detected by default. Can be alternatively set using the "Database" enum.
spring.jpa.generate-ddl=false # Whether to initialize the schema on startup.
spring.jpa.hibernate.ddl-auto= # DDL mode. This is actually a shortcut for the "hibernate.hbm2ddl.auto" property. Defaults to "create-drop" when using an embedded database and no schema manager was detected. Otherwise, defaults to "none".
spring.jpa.hibernate.naming.implicit-strategy= # Fully qualified name of the implicit naming strategy.
spring.jpa.hibernate.naming.physical-strategy= # Fully qualified name of the physical naming strategy.
spring.jpa.hibernate.use-new-id-generator-mappings= # Whether to use Hibernate's newer IdentifierGenerator for AUTO, TABLE and SEQUENCE.
spring.jpa.mapping-resources= # Mapping resources (equivalent to "mapping-file" entries in persistence.xml).
spring.jpa.open-in-view=true # Register OpenEntityManagerInViewInterceptor. Binds a JPA EntityManager to the thread for the entire processing of the request.
spring.jpa.properties.*= # Additional native properties to set on the JPA provider.
spring.jpa.show-sql=false # Whether to enable logging of SQL statements.

设置database、database-platform或只从pom.xml中删除spring-data-jpa