tomcat插件中未加载的Servlet api

Question

信息:validateJarFile(C:\program Files(x86)\apache-tomcat-7.0.47\webapps\myapp\web-
inf\lib\servlet-api-2.5-6.1.11.jar)-jar未加载。参见Servlet Spe C2.3，第9.7.2节。违规类:javax/servlet/servlet.class 16-gen-2014 14.18.25 org.apache.catalina.core.standardContext startInternal grave：Error listenerStart 16-gen-2014 14.18.25 org.apache.catalina.core.standardContext startInternal grave：Context[/myapp]由于以前的错误启动失败

而如果我通过jetty：Run使用jetty，一切都正常。

这是我的插件配置

        <!-- To launch embded jetty server -->
        <plugin>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>${maven-jetty-plugin.version}</version>
            <configuration>
                <webAppConfig>
                    <contextPath>/${project.name}</contextPath>
                </webAppConfig>
            </configuration>
        </plugin>
    <!-- To launch embded tomcat server -->
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.1</version>
            <configuration>
                <url>http://localhost:8081/manager/text</url>
                <server>my-tomcat</server>
                <path>/MyApp</path>
            </configuration>
        </plugin>

    <!-- Spring dependencies -->
     <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
     <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
         <exclusions>
        <!-- Exclude Commons Logging in favor of SLF4j -->
            <exclusion>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
            </exclusion>
        </exclusions>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>

 <!-- default j2ee dependencies  -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>${servlet-api.version}</version>
        <scope>provided</scope>
    </dependency>

Answer 1

错误消息的重要部分是

信息:validateJarFile(C:\program Files(x86)\apache-tomcat-7.0.47\webapps\myapp\WEB-INF\lib\servlet-api-2.5-6.1.11.jar)-jar未加载。参见Servlet Spe C2.3，第9.7.2节。违规类:javax/servlet/servlet.class

这意味着您试图加载servlet-api-2.5-6.1.11.jar，作为包含javax.servlet.servlet定义的web应用程序的一部分。该规范的第9.7.2节指出，容器用于加载servlet的classloader不得允许WAR覆盖J2SE或Java servlet API类。

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-war-plugin</artifactId>
  <version>2.1-alpha-2</version>
  <configuration>
  ...
    <packagingExcludes>WEB-INF/lib/javax.servlet-*.jar</packagingExcludes>
  ...
  </configuration>
</plugin>