: start: 问题出现的原因和解决方法

今天看到以下异常，昨天还好好的，今天怎么就不行了呢，有点纳闷，仔细查看了提示，找到了问题出现的原因。

严重: : start: 
: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Product]]
	at (:154)
	at (:901)
	at (:877)
	at (:632)
	at (:1229)
	at $(:1875)
	at $(:471)
	at (:262)
	at (:1145)
	at $(:615)
	at (:744)
Caused by: : Invalid <url-pattern> myAcount in servlet mapping
	at (:3279)
	at (:3254)
	at (:1361)
	at (:1341)
	at (:873)
	at (:371)
	at (:117)
	at (:90)
	at (:5355)
	at (:150)
	... 10 more
四月 17, 2018 7:55:43 上午  deployDirectory
严重: Error deploying web application directory H:\apache-tomcat-7.0.52-windows-x64\apache-tomcat-7.0.52\webapps\Product
: : start: : Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Product]]
	at (:904)
	at (:877)
	at (:632)
	at (:1229)
	at $(:1875)
	at $(:471)
	at (:262)
	at (:1145)
	at $(:615)
	at (:744)

可以看到的是

Caused by: : Invalid <url-pattern> myAcount in servlet mapping
	at (:3279)
	at (:3254)
	at (:1361)

myAccout是我新建的一个Servlet的mapping，然后就一下什么都明白了。就是写mapping的时候忘记了在前面添加"/"号。。呃。。。这错误有点低级
希望能给大家解决问题提供些帮助吧，别被这些小错误给困扰到！嘻嘻