没有找到Tomcat映射器类

Question

我正在创建一个web应用程序，目前我正试图让tomcat服务器运行。然而，当从cmd行运行时，我得到这个错误信息。

 Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tomcat/uti
   l/http/mapper/Mapper
    at org.apache.catalina.core.StandardContext.<init>(StandardContext.java:457)
    at org.apache.catalina.startup.Tomcat.addWebapp(Tomcat.java:532)
    at org.apache.catalina.startup.Tomcat.addWebapp(Tomcat.java:526)
    at org.apache.catalina.startup.Tomcat.addWebapp(Tomcat.java:207)
    at hello.Server.createTomcatServer(Server.java:34)
    at hello.Application.main(Application.java:57)
Caused by: java.lang.ClassNotFoundException: org.apache.tomcat.util.http.mapper.
Mapper
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 6 more

这是我的pom.xml

   <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org     /2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-relational-data-access</artifactId>
<version>0.1.0</version>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.0.0.RC4</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-catalina</artifactId>
        <version>7.0.52</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
    </dependency>
</dependencies>
<properties>
    <start-class>hello.Application</start-class>
</properties>
<build>
    <plugins>
        <plugin> 
            <artifactId>maven-compiler-plugin</artifactId> 
            <version>2.3.2</version> 
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>          
        </plugin>
        <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <version>2.4</version>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>2.2</version>
            <configuration>
              <!-- put your configurations here -->
            </configuration>
            <executions>
              <execution>
                <phase>package</phase>
                <goals>
                  <goal>shade</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
    </plugins>
</build>
<repositories>
    <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>http://repo.spring.io/libs-snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>http://repo.spring.io/libs-milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>
<pluginRepositories>
    <pluginRepository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>http://repo.spring.io/libs-snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </pluginRepository>
</pluginRepositories>

最后是tomcat服务器代码:

  public void createTomcatServer() throws ServletException, LifecycleException{
    Tomcat tomcat = null;
    Integer webPort = new Integer(9696);
    tomcat.setPort(webPort);
    tomcat.addWebapp("/", new File(webappDirLocation).getAbsolutePath());
    System.out.println("configuring app with basedir: " + new File("./" +    webappDirLocation).getAbsolutePath());
    tomcat.start();
    tomcat.getServer().await();
}

我认为我已经包含了所有正确的依赖项，等等。但是我就是不知道为什么它不能工作——我已经在谷歌上找遍了——所以任何帮助都会非常感激。

Answer 1

我也遇到了同样的问题，并通过依赖嵌入模块来解决它。

<dependency>
  <groupId>org.apache.tomcat.embed</groupId>
  <artifactId>tomcat-embed-core</artifactId>
  <version>${embedded.tomcat.version}</version>
</dependency>