无法将我的springboot API连接到MYSQL数据库

Question

我设法将我的应用程序与HSQLDB连接起来，并使其运行良好。然而，我在将它连接到MySQL时遇到了一些麻烦。

下面是我的堆栈跟踪：

应用程序运行失败

null

我的pom.xml文件：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.0.M3</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>Demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Demo</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>14</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-data-rest</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
    </repository>
</repositories>
<pluginRepositories>
    <pluginRepository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
    </pluginRepository>
</pluginRepositories>

null

这里是我的application.properties文件：

**spring.datasource.url** = jdbc:mysql://localhost:3306/springbootdb?useSSL=false
**spring.datasource.username** = thalysmg
**spring.datasource.password** =
## Hibernate Properties
**spring.jpa.properties.hibernate.dialect** = org.hibernate.dialect.MySQL5InnoDBDialect
**spring.jpa.hibernate.ddl-auto = update**

如果我没有错的话，我将MySQL用户配置为与我在ubuntu中的系统用户相同，这样我就可以用“mysql-u thalysmg”启动MySQL控制台，而不必键入我的密码。我已经试过使用“root”而不是“thalysmg”，并且试过使用和不使用我的密码。我到处寻找解决办法，但没有成功。希望任何人能帮助我！

Answer 1

为什么在应用程序.属性中使用星型？删除它们

spring.datasource.url=jdbc:mysql://localhost:3306/springbootdb?useSSL=false
spring.datasource.username=thalysmg
spring.datasource.password=
## Hibernate Properties
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.hibernate.ddl-auto=update