异常信息：
: Error creating bean with name 'xxx' defined in file [G:\MagicMed\SVN\gouxinjie\trunk\procedure\MagicMedEcg\target\MagicMedEcg\WEB-INF\classes\com\magicmed\ecg\common\utils\mqtt\]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is : No qualifying bean of type '' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at (:749)
at (:189)
at (:1193)
at (:1095)
at (:513)
at (:483)
at $(:306)
at (:230)
at (:302)
10-Sep-2018 18:19:20.631 严重 [RMI TCP Connection(3)-127.0.0.1] One or more listeners failed to start. Full details will be found in the appropriate container log file
at (:197)
at (:761)
10-Sep-2018 18:19:20.633 严重 [RMI TCP Connection(3)-127.0.0.1] Context [/MagicMedEcg] startup failed due to previous errors
at (:867)
at (:543)
at (:443)
at (:325)
at (:107)
at (:4853)
at (:5314)
at (:145)
at (:753)
at (:729)
at (:717)
at (:1733)
at .invoke0(Native Method)
at (:62)
at (:43)
at (:498)
at (:300)
at (:819)
at (:801)
at (:484)
at (:433)
at .invoke0(Native Method)
at (:62)
at (:43)
at (:498)
at (:300)
at (:819)
at (:801)
at (:1468)
at $300(:76)
at $(:1309)
at (:1401)
at (:829)
at .invoke0(Native Method)
at (:62)
at (:43)
at (:498)
at (:324)
at $(:200)
at $(:197)
at (Native Method)
at (:196)
at (:568)
at $ConnectionHandler.run0(:826)
at $$run$0(:683)
at (Native Method)
at $(:682)
at (:1142)
at $(:617)
at (:745)
Caused by: : No qualifying bean of type '' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at (:1493)
at (:1104)
at (:1066)
at (:835)
at (:741)
... 60 more
问题解决：由于在类里面定义了“有参构造方法”，这样的话就会覆盖原先的“无参构造方法”，所以会出现此异常，所以在类里面加上“无参构造方法”就完了（折磨了好长时间，特此记录一下）。