错误信息“com.mysql.cj.exceptions.WrongArgument

Question

我正在使用 MySQL 数据库开发一个 Spring Boot 项目。如果我运行我的代码，一个WrongArgumentException说法是databaseURL cannot be null.

application.properties:

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.jdbc-url=jdbc:mysql//localhost:3306/reserving?autoReconnect=true&useSSL=false

spring.datasource.username=root

spring.datasource.password=****

##Mapper Config##

mybatis.type-aliases-package=com.springboot.reserving

mybatis.mapper-locations=mapper/**/*.xml

spring.devtools.livereload.enabled =true

spring.freemarker.cache=false

错误信息：

java.sql.SQLNonTransientConnectionException: Cannot load connection class

 because of underlying exception: 

com.mysql.cj.exceptions.WrongArgumentException: The database URL cannot be null.

Answer 1

将属性更改spring.datasource.jdbc-url为spring.datasource.url=jdbc:mysql//localhost:3306/reserving?autoReconnect=true&useSSL=false

Answer 2

应用程序属性spring.datasource.jdbc-url中没有命名的属性改变spring.datasource.jdbc-url到spring.datasource.urlspring.datasource.platform=mysqlspring.datasource.url=jdbc:mysql//localhost:3306/reserving?autoReconnect=true&useSSL=false spring.datasource.username=rootspring.datasource.password=****spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driverspring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect