我使用Vaadin 7,vaadin有一个默认包javax.servlet
,我的依赖项中需要com.google.gwt
,其中包含另一个javax.servlet
。当我运行我的应用程序时,我收到了这个错误:
SEVERE: Allocate exception for servlet Vaadin Application Servlet
java.lang.ClassCastException: com.vaadin.server.VaadinServlet cannot be cast to javax.servlet.Servlet
现在我想从这个依赖项中排除javax.servlet,这是我到目前为止所尝试的:
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>2.6.1</version>
<exclusions>
<exclusion> <!-- declare the exclusion here -->
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
</exclusions>
</dependency>
和此:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<filters>
<filter>
<minimizeJar>true</minimizeJar>
<artifact>com.google.gwt:gwt-user</artifact>
<includes>
<include>com/google/**</include>
</includes>
<excludes>
<exclude>javax/servlet/**</exclude>
<exclude>javax/servlet/http/**</exclude>
<exclude>javax/servlet/resources/**</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
但两者都不起作用!救命啊!
答案 0 :(得分:2)
我认为你实际上想要gwt-servlet
依赖而不是gwt-user
。
com.vaadin
依赖项?
答案 1 :(得分:1)
根据您的第二次尝试,以下面给出的方式排除所需的包裹:
示例:
<configuration>
<packagingExcludes>
WEB-INF/lib/servlet-api*.jar,
WEB-INF/lib/jsp-api*.jar,
WEB-INF/lib/jstl-api*.jar,
</packagingExcludes>
</configuration>