項目啟動報錯，沒有導入HttpServletRequest的jar包，右擊項目名-》build path—》configure build path—》add libraries —》Server Runtime—》 Apache Tomcatv7.0
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Caused by: java.lang.ClassNotFoundException: Cannot find class: User
Caused by: java.lang.ClassNotFoundException: javax.el.ELManager 解決
Caused by: java.lang.ClassNotFoundException: javassist.ClassPool
Caused by: java.lang.ClassNotFoundException: org.springframework.expression.ExpressionParser
Caused by: java.lang.ClassNotFoundException: Cannot find class: userMap
Caused by: java.lang.ClassNotFoundException: backtype.storm.topology.IRichSpout
Caused by: java.lang.ClassNotFoundException: ...boot.context.properties.ConfigurationPropertiesBean
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.Validation
Caused by: java.lang.ClassNotFoundException: javax.transaction.TransactionManager
Caused by: java.lang.ClassNotFoundException: org.springframework.context.App