send a message web project in the hope that people can understand help me , thank you

My project has been put into the jar package lib directory , or how classNotFoundException specific exception information , the following picture there , grateful


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also need a activation.jar
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+1
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+1, java mail requires two packages . . . activation.jar and mail.jar
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1.3. 1 .... shelf package is too old now this
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This is just the latest version of the official line
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Thank you to solve the problem , haha ​​