錯誤消息“ com.mysql.cj.exceptions.WrongArgumentException：數據庫URL不能為null。”是什么意思？

Question

我正在使用MySQL數據庫進行Spring Boot項目。 如果我運行我的代碼，則出現WrongArgumentException ，它表示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

錯誤信息：

java.sql.SQLNonTransientConnectionException: Cannot load connection class
 because of underlying exception: 
com.mysql.cj.exceptions.WrongArgumentException: The database URL cannot be null.

Answer 1

將屬性spring.datasource.jdbc-url更改為

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

Answer 2

application-properties中沒有名為spring.datasource.jdbc-url 的屬性

更改

spring.datasource.jdbc-url

至

spring.datasource.url

---

spring.datasource.platform=mysql
spring.datasource.url=jdbc:mysql//localhost:3306/reserving?autoReconnect=true&useSSL=false 
spring.datasource.username=root
spring.datasource.password=****
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect