spring boot项目启动报错:Failed to load property source from location 'classpath:/application.yml'-蒲公英云

spring boot项目启动报错:Failed to load property source from location 'classpath:/application.yml'

控制台报错信息：

01:25:43.686 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
java.lang.IllegalStateException: Failed to load property source from location 'classpath:/application.yml'
    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:549)
    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadForFileExtension(ConfigFileApplicationListener.java:500)
    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:468)
    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$null$6(ConfigFileApplicationListener.java:450)
    at java.lang.Iterable.forEach(Iterable.java:75)

可以看出提示application.yml有问题。

场景一：yml的语法格式有误

application.yml:

spring:
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        username: root
        password: 123456
        url: jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8
      datasource:
          type: com.alibaba.druid.pool.DruidDataSource

解决方法：修改后的application.yml：

spring:
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        username: root
        password: 123456
        url: jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8
        type: com.alibaba.druid.pool.DruidDataSource

ps:校验yml语法

注：注意缩进

控制台并无异常，成功运行。

场景二：application.yml文件格式问题

application.yml 配置文件内容：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
    username: root
    password: 123456
  servlet:
    multipart:
      max-file-size: 5MB # 限制文件上传的大小