關鍵的一段在這里

Adding?[localProperties]?PropertySource?with?lowest?search?precedence
Searching?for?key?'driver'?in?[environmentProperties]
Searching?for?key?'driver'?in?[systemProperties]
Searching?for?key?'driver'?in?[systemEnvironment]
Could?not?find?key?'driver'?in?any?property?source.?Returning?[null]
Searching?for?key?'driver'?in?[localProperties]
Found?key?'driver'?in?[localProperties]?with?type?[String]?and?value?'com.mysql.jdbc.Driver'
Searching?for?key?'url'?in?[environmentProperties]
Searching?for?key?'url'?in?[systemProperties]
Searching?for?key?'url'?in?[systemEnvironment]
Could?not?find?key?'url'?in?any?property?source.?Returning?[null]
Searching?for?key?'url'?in?[localProperties]
Found?key?'url'?in?[localProperties]?with?type?[String]?and?value?'jdbc:mysql://localhost:3306/azmp'
Searching?for?key?'username'?in?[environmentProperties]
Searching?for?key?'username'?in?[systemProperties]
Searching?for?key?'username'?in?[systemEnvironment]
PropertySource?[systemEnvironment]?contains?'USERNAME'
PropertySource?[systemEnvironment]?does?not?contain?'username',?but?found?equivalent?'USERNAME'
Found?key?'username'?in?[systemEnvironment]?with?type?[String]?and?value?'Administrator'
Found?key?'username'?in?[environmentProperties]?with?type?[String]?and?value?'Administrator'

之前的dirverclass和url都是從localProperties中獲取的，

可是username是從systemEnvironment中獲取的，

求有經驗的大神教我如何解決