当我尝试构建一个spring项目时，在这个类中发生错误：
public class WebAppInitializer implements WebApplicationInitializer {
@SuppressWarnings("resource")
public void onStartup(ServletContext context) throws ServletException {
// Create the 'root' Spring application context
AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(WebAppConfig.class);
// Create the dispatcher servlet's Spring application context
AnnotationConfigWebApplicationContext jspContext = new AnnotationConfigWebApplicationContext();
jspContext.register(DispatcherConfig.class);
// Register and map the dispatcher servlet
ServletRegistration.Dynamic dispatcher = context.addServlet("dispatcher", new DispatcherServlet(jspContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
dispatcher.setMultipartConfig(new MultipartConfigElement("/tmp", 1024*1024*5, 1024*1024*5*5, 1024*1024));
}
}
错误：
[INFO] 5 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 33.415 s
[INFO] Finished at: 2016-05-30T09:31:59-03:00
[INFO] Final Memory: 23M/285M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile (default-compile) on project loja: Compilation failure: Compilation failure:
[ERROR] /c:/Users/Kleber Mota/Documents/GitHub/loja_on_line/src/main/java/com/webapp/loja/app/WebAppInitializer.java:[3,21] cannot find symbol
[ERROR] symbol: class MultipartConfigElement
[ERROR] location: package javax.servlet
[ERROR] /c:/Users/Kleber Mota/Documents/GitHub/loja_on_line/src/main/java/com/webapp/loja/app/WebAppInitializer.java:[6,21] cannot find symbol
[ERROR] symbol: class ServletRegistration
[ERROR] location: package javax.servlet
[ERROR] /c:/Users/Kleber Mota/Documents/GitHub/loja_on_line/src/main/java/com/webapp/loja/app/WebAppInitializer.java:[27,34] package ServletRegistration does not exist
[ERROR] /c:/Users/Kleber Mota/Documents/GitHub/loja_on_line/src/main/java/com/webapp/loja/app/WebAppInitializer.java:[27,63] cannot find symbol
[ERROR] symbol: method addServlet(java.lang.String,org.springframework.web.servlet.DispatcherServlet)
[ERROR] location: variable context of type javax.servlet.ServletContext
[ERROR] /c:/Users/Kleber Mota/Documents/GitHub/loja_on_line/src/main/java/com/webapp/loja/app/WebAppInitializer.java:[30,49] cannot find symbol
[ERROR] symbol: class MultipartConfigElement
[ERROR] location: class com.webapp.loja.app.WebAppInitializer
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
我对pom.xml的依赖是：
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.0.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.ws</groupId>
<artifactId>spring-ws-core</artifactId>
<version>2.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.5.Final</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.0.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.0.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.3-1102-jdbc4</version>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.4.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>com.paypal.sdk</groupId>
<artifactId>rest-api-sdk</artifactId>
<version>0.5.2</version>
</dependency>
<!-- Spring Social -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-core</artifactId>
<version>1.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-config</artifactId>
<version>1.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-security</artifactId>
<version>1.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-web</artifactId>
<version>1.1.4.RELEASE</version>
</dependency>
<!-- Spring Social Facebook -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-facebook-web</artifactId>
<version>2.0.3.RELEASE</version>
</dependency>
<!-- Spring Social Twitter -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-twitter</artifactId>
<version>1.1.2.RELEASE</version>
</dependency>
<!-- Spring Social Google -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-google</artifactId>
<version>1.0.0.RELEASE</version>
</dependency>
</dependencies>
我在这里缺少什么？