我如何解决这个问题？

Question

启动错误

ApplicationContext.若要显示条件报告，请在启用“调试”的情况下重新运行应用程序。2019-10-17 15:44:43.968错误10460--[main]O.S.Boot.SpringApplication：应用程序运行失败

package com.example.angular;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class CrudangularApplication {

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

}

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 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>2.1.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.perf</groupId>
    <artifactId>crudangular</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>crudangular</name>
    <description>Demo project for Spring Boot</description>

    <properties>
    <maven-jar-plugin.version>3.1.1</maven-jar-plugin.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-web</artifactId>
        </dependency>

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

</project>

Answer 1

您需要在application.yaml文件中设置一个属性

spring.datasource.driverclassname=com.mysql.cj.jdbc.driver

原因是MySQL将驱动程序的包从com.MySQL.jdbc.driver改为com.MySQL.cj.jdbc.driver。