1.Application 啟動類加注解
@PropertySource(value = { "classpath:application.properties", "file:./config/application.properties" }, ignoreResourceNotFound = true)
讀取順序，先找classpath 下application.properties 如果找不到讀同級/config/application.properties
2.src 同級目錄新建 config文件夾並放入application.properties 配置文件