Add Tld scanning exceptions to Tomcat startup

Addresses gh-263 to some extent.

spring-boot-samples/spring-boot-sample-actuator/pom.xml

@@ -90,12 +90,8 @@
 			</activation>
 			<dependencies>
 				<dependency>
-					<groupId>org.eclipse.jetty</groupId>
+					<groupId>org.springframework.boot</groupId>
-					<artifactId>jetty-webapp</artifactId>
+					<artifactId>spring-boot-starter-jetty</artifactId>
-				</dependency>
-				<dependency>
-					<groupId>javax.servlet</groupId>
-					<artifactId>javax.servlet-api</artifactId>
 				</dependency>
 			</dependencies>
 		</profile>

spring-boot/src/main/java/org/springframework/boot/context/embedded/tomcat/TomcatEmbeddedServletContainerFactory.java

@@ -37,6 +37,7 @@ import org.apache.catalina.Valve;
 import org.apache.catalina.Wrapper;
 import org.apache.catalina.connector.Connector;
 import org.apache.catalina.loader.WebappLoader;
+import org.apache.catalina.startup.TldConfig;
 import org.apache.catalina.startup.Tomcat;
 import org.apache.catalina.startup.Tomcat.FixContextListener;
 import org.apache.coyote.AbstractProtocol;
@@ -89,6 +90,14 @@ public class TomcatEmbeddedServletContainerFactory extends
 
 	private String protocol = DEFAULT_PROTOCOL;
 
+	private static String DEFAULT_NO_TLD_JARS = "tomcat-*.jar,tools.jar,commons-beanutils*.jar,commons-codec*.jar,commons-collections*.jar,"
+			+ "commons-dbcp*.jar,commons-digester*.jar,commons-fileupload*.jar,commons-httpclient*.jar,commons-io*.jar,commons-lang*.jar,"
+			+ "commons-logging*.jar,commons-math*.jar,commons-pool*.jar,jstl-*.jar,geronimo-spec-jaxrpc*.jar,wsdl4j*.jar,ant-*.jar,"
+			+ "aspectj*.jar,jmx.jar,h2*.jar,hibernate*.jar,httpclient*.jar,jmx-tools-*.jar,jta*.jar,log4j-*.jar,mail*.jar,slf4j*.jar,"
+			+ "xercesImpl-*.jar,xmlParserAPIs-*.jar,xml-apis-*.jar,junit-*.jar,hamcrest*.jar,org.hamcrest*.jar";
+
+	private String noTldJars = DEFAULT_NO_TLD_JARS;
+
 	/**
 	 * Create a new {@link TomcatEmbeddedServletContainerFactory} instance.
 	 */
@@ -137,6 +146,7 @@ public class TomcatEmbeddedServletContainerFactory extends
 	protected void prepareContext(Host host, ServletContextInitializer[] initializers) {
 		File docBase = getValidDocumentRoot();
 		docBase = (docBase != null ? docBase : createTempDir("tomcat-docbase"));
+		TldConfig.setNoTldJars(this.noTldJars);
 		TomcatEmbeddedContext context = new TomcatEmbeddedContext();
 		context.setName(getContextPath());
 		context.setPath(getContextPath());
@@ -281,6 +291,16 @@ public class TomcatEmbeddedServletContainerFactory extends
 		this.baseDirectory = baseDirectory;
 	}
 
+	/**
+	 * A comma-separated list of jars to ignore for TLD scanning. See Tomcat's
+	 * catalina.properties for typical values. Defaults to a list drawn from that source.
+	 * 
+	 * @param noTldJars the noTldJars to set
+	 */
+	public void setNoTldJars(String noTldJars) {
+		this.noTldJars = noTldJars;
+	}
+
 	/**
 	 * The Tomcat protocol to use when create the {@link Connector}.
 	 * @see Connector#Connector(String)