maven websocket eclipse

Question

<plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.3-SNAPSHOT</version>
            <configuration>
                <url>http://localhost:8080/manager/html</url>
                <server>tomcat</server>
            </configuration>

        </plugin>

这个版本的websocket会报错，找不到相应的ws的mapping的处理类，再引入catalina和另外一个jar包后，还是报错，请问怎么？maven的jetty只有6，也不支持websocket，glassfish的maven找不到地方下载。。。求救啊，已经试了3天了，使用过 jetty tomcat  spring，都因为容器问题不支持。。。

Answer 1

<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.2</version>
    <configuration>
        <path>/</path>
        <port>8090</port>
        <uriEncoding>${project.build.sourceEncoding}</uriEncoding>
    </configuration>
    <dependencies>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-websocket-api</artifactId>
            <version>${tomcat7Version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat7-websocket</artifactId>
            <version>${tomcat7Version}</version>
        </dependency>
    </dependencies>
</plugin>