diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java
index 8bb8581689..1fdc54cca8 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java
@@ -279,9 +279,9 @@ public class JettyServletWebServerFactory extends AbstractServletWebServerFactor
 		}
 	}
 
-	private Resource createResource(URL url) throws IOException {
+	private Resource createResource(URL url) throws Exception {
 		if ("file".equals(url.getProtocol())) {
-			File file = new File(getDecodedFile(url));
+			File file = new File(url.toURI());
 			if (file.isFile()) {
 				return Resource.newResource("jar:" + url + "!/META-INF/resources");
 			}
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java
index e2ed862799..6947f403c2 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java
@@ -674,8 +674,8 @@ public class TomcatServletWebServerFactory extends AbstractServletWebServerFacto
 
 		private void addResourceJars(List<URL> resourceJarUrls) {
 			for (URL url : resourceJarUrls) {
-				String file = getDecodedFile(url);
-				if (file.endsWith(".jar") || file.endsWith(".jar!/")) {
+				String path = url.getPath();
+				if (path.endsWith(".jar") || path.endsWith(".jar!/")) {
 					String jar = url.toString();
 					if (!jar.startsWith("jar:")) {
 						// A jar file in the file system. Convert to Jar URL.
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java
index 4424986e12..604090f81c 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java
@@ -361,18 +361,18 @@ public class UndertowServletWebServerFactory extends AbstractServletWebServerFac
 				: new LoaderHidingResourceManager(rootResourceManager));
 		for (URL url : metaInfResourceUrls) {
 			if ("file".equals(url.getProtocol())) {
-				File file = new File(getDecodedFile(url));
-				if (file.isFile()) {
-					try {
+				try {
+					File file = new File(url.toURI());
+					if (file.isFile()) {
 						resourceJarUrls.add(new URL("jar:" + url + "!/"));
 					}
-					catch (MalformedURLException ex) {
-						throw new RuntimeException(ex);
+					else {
+						resourceManagers.add(new FileResourceManager(
+								new File(file, "META-INF/resources"), 0));
 					}
 				}
-				else {
-					resourceManagers.add(new FileResourceManager(
-							new File(file, "META-INF/resources"), 0));
+				catch (Exception ex) {
+					throw new RuntimeException(ex);
 				}
 			}
 			else {
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactory.java
index ba97934054..381fbf4a6c 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactory.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactory.java
@@ -282,6 +282,14 @@ public abstract class AbstractServletWebServerFactory
 		return this.staticResourceJars.getUrls();
 	}
 
+	/**
+	 * Converts the given {@code url} into a decoded file path.
+	 *
+	 * @param url the url to convert
+	 * @return the file path
+	 * @deprecated Since 2.0.2 in favor of {@link File#File(java.net.URI)}
+	 */
+	@Deprecated
 	protected final String getDecodedFile(URL url) {
 		try {
 			return URLDecoder.decode(url.getFile(), "UTF-8");
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/StaticResourceJars.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/StaticResourceJars.java
index 72c6594d26..0b1f492996 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/StaticResourceJars.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/server/StaticResourceJars.java
@@ -18,14 +18,13 @@ package org.springframework.boot.web.servlet.server;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.UnsupportedEncodingException;
 import java.lang.management.ManagementFactory;
 import java.net.JarURLConnection;
 import java.net.MalformedURLException;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.net.URLConnection;
-import java.net.URLDecoder;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.jar.JarFile;
@@ -71,10 +70,20 @@ class StaticResourceJars {
 		}
 	}
 
+	private File toFile(URL url) {
+		try {
+			return new File(url.toURI());
+		}
+		catch (URISyntaxException ex) {
+			throw new IllegalStateException(
+					"Failed to create File from URL '" + url + "'");
+		}
+	}
+
 	private void addUrl(List<URL> urls, URL url) {
 		try {
 			if ("file".equals(url.getProtocol())) {
-				addUrlFile(urls, url, new File(getDecodedFile(url)));
+				addUrlFile(urls, url, toFile(url));
 			}
 			else {
 				addUrlConnection(urls, url, url.openConnection());
@@ -85,16 +94,6 @@ class StaticResourceJars {
 		}
 	}
 
-	private String getDecodedFile(URL url) {
-		try {
-			return URLDecoder.decode(url.getFile(), "UTF-8");
-		}
-		catch (UnsupportedEncodingException ex) {
-			throw new IllegalStateException(
-					"Failed to decode '" + url.getFile() + "' using UTF-8");
-		}
-	}
-
 	private void addUrlFile(List<URL> urls, URL url, File file) {
 		if ((file.isDirectory() && new File(file, "META-INF/resources").isDirectory())
 				|| isResourcesJar(file)) {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/StaticResourceJarsTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/StaticResourceJarsTests.java
index 8ae5788c14..fbbff0255f 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/StaticResourceJarsTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/StaticResourceJarsTests.java
@@ -58,6 +58,14 @@ public class StaticResourceJarsTests {
 		assertThat(staticResourceJarUrls).hasSize(1);
 	}
 
+	@Test
+	public void includeJarWithStaticResourcesWithPlusInItsPath() throws Exception {
+		File jarFile = createResourcesJar("test + resources.jar");
+		List<URL> staticResourceJarUrls = new StaticResourceJars()
+				.getUrlsFrom(jarFile.toURI().toURL());
+		assertThat(staticResourceJarUrls).hasSize(1);
+	}
+
 	@Test
 	public void excludeJarWithoutStaticResources() throws Exception {
 		File jarFile = createJar("dependency.jar");
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/IdeApplicationLauncher.java b/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/IdeApplicationLauncher.java
index bec7657a1b..cae0c23066 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/IdeApplicationLauncher.java
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/IdeApplicationLauncher.java
@@ -40,7 +40,7 @@ import org.springframework.util.StringUtils;
  */
 class IdeApplicationLauncher extends AbstractApplicationLauncher {
 
-	private final File exploded = new File("target/ide application");
+	private final File exploded = new File("target/the+ide application");
 
 	IdeApplicationLauncher(ApplicationBuilder applicationBuilder) {
 		super(applicationBuilder);