如果不配置scope,會把jar包釋出,會跟容器裡的jar包沖突
scope要用provided,由容器提供,不會釋出
(或者不配這兩個依賴,在項目的Java Build Path的Libraries裡添加Server Runtime(Tomcat))
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>