使用spring过程中遇到的问题

java.lang.SecurityException: sealing violation: package javax.servlet is sealed

    at java.net.URLClassLoader.getAndVerifyPackage(URLClassLoader.java:399)
    at java.net.URLClassLoader.definePackageInternal(URLClassLoader.java:419)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:451)

    <dependency>
      <groupId>jetty</groupId>
      <artifactId>javax.servlet</artifactId>
      <version>5.1.12</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>