diff --git a/src/main/java/cokr/xit/foundation/ApplicationException.java b/src/main/java/cokr/xit/foundation/ApplicationException.java
index afe43ee..be70e16 100644
--- a/src/main/java/cokr/xit/foundation/ApplicationException.java
+++ b/src/main/java/cokr/xit/foundation/ApplicationException.java
@@ -13,9 +13,7 @@ public class ApplicationException extends RuntimeException {
 	 * @return ApplicationException
 	 */
 	public static ApplicationException get(Throwable cause) {
-		return cause instanceof ApplicationException ?
-			ApplicationException.class.cast(cause) :
-			new ApplicationException(cause);
+		return cause instanceof ApplicationException ae ? ae : new ApplicationException(cause);
 	}
 
 	private DataObject objs;
diff --git a/src/main/java/cokr/xit/foundation/Assert.java b/src/main/java/cokr/xit/foundation/Assert.java
index c1dc8c5..bfa3911 100644
--- a/src/main/java/cokr/xit/foundation/Assert.java
+++ b/src/main/java/cokr/xit/foundation/Assert.java
@@ -18,12 +18,10 @@ public class Assert {
 	 */
 	public static final boolean isEmpty(Object obj) {
 		if (obj == null) return true;
-		if (obj instanceof String) {
-			String str = (String)obj;
-			return str.trim().isEmpty();
+		if (obj instanceof String str) {
+			return str.isEmpty() || str.isBlank();
 		}
-		if (obj instanceof Iterable) {
-			Iterable<?> objs = (Iterable<?>)obj;
+		if (obj instanceof Iterable<?> objs) {
 			return !objs.iterator().hasNext();
 		}
 		if (obj.getClass().isArray()) {
@@ -94,8 +92,8 @@ public class Assert {
 	public static final Throwable rootCause(Throwable t) {
 		Throwable cause = t != null ? t.getCause() : null;
 		if (cause == null
-		 && t instanceof InvocationTargetException)
-			cause = ((InvocationTargetException)t).getTargetException();
+		 && t instanceof InvocationTargetException e)
+			cause = e.getTargetException();
 		return cause == null || cause == t ? t : rootCause(cause);
 	}
 
@@ -105,7 +103,7 @@ public class Assert {
 	 */
 	public static final RuntimeException runtimeException(Throwable t) {
 		t = rootCause(t);
-		return t instanceof RuntimeException ? RuntimeException.class.cast(t) : new RuntimeException(t);
+		return t instanceof RuntimeException re ? re : new RuntimeException(t);
 	}
 
 	/**{@link Assert}에 대한 인터페이스.
diff --git a/src/main/java/cokr/xit/foundation/data/Convert.java b/src/main/java/cokr/xit/foundation/data/Convert.java
index 8f6a9fb..e122c84 100644
--- a/src/main/java/cokr/xit/foundation/data/Convert.java
+++ b/src/main/java/cokr/xit/foundation/data/Convert.java
@@ -79,8 +79,7 @@ public class Convert {
 			return Integer.valueOf(0);
 		if (obj instanceof Number)
 			return Number.class.cast(obj);
-		if (obj instanceof String) {
-			String s = (String)obj;
+		if (obj instanceof String s) {
 			return Double.valueOf(s.replace(",", "").trim());
 		}
 		throw inconvertible(obj, Number.class);
diff --git a/src/main/java/cokr/xit/foundation/data/DataFormat.java b/src/main/java/cokr/xit/foundation/data/DataFormat.java
index 8463a86..08eb01a 100644
--- a/src/main/java/cokr/xit/foundation/data/DataFormat.java
+++ b/src/main/java/cokr/xit/foundation/data/DataFormat.java
@@ -90,8 +90,8 @@ public class DataFormat extends AbstractComponent {
 			} catch (Exception e) {
 				return str;
 			}
-		} else if (obj instanceof Date)
-			return dateFormat.format((Date)obj);
+		} else if (obj instanceof Date date)
+			return dateFormat.format(date);
 		else
 			throw new IllegalArgumentException(obj + " is not a Date");
 	}
@@ -106,10 +106,10 @@ public class DataFormat extends AbstractComponent {
 		Number num = null;
 		if (obj == null)
 			num = 0;
-		else if (obj instanceof String)
-			num = Double.valueOf(ifEmpty((String)obj, "0"));
-		else if (obj instanceof Number)
-			num = (Number)obj;
+		else if (obj instanceof String str)
+			num = Double.valueOf(ifEmpty(str, "0"));
+		else if (obj instanceof Number n)
+			num = n;
 		else
 			throw new IllegalArgumentException(obj + " is not a number");
 
diff --git a/src/main/java/cokr/xit/foundation/data/DataObject.java b/src/main/java/cokr/xit/foundation/data/DataObject.java
index 5d06712..7056b53 100644
--- a/src/main/java/cokr/xit/foundation/data/DataObject.java
+++ b/src/main/java/cokr/xit/foundation/data/DataObject.java
@@ -19,7 +19,7 @@ public class DataObject extends StringMap<Object> {
 	 */
 	public static DataObject create(Map<String, ?> map) {
 		if (map == null) return null;
-		if (map instanceof DataObject) return (DataObject)map;
+		if (map instanceof DataObject dataObject) return dataObject;
 
 		DataObject result = new DataObject();
 		map.forEach(result::put);
@@ -88,7 +88,7 @@ public class DataObject extends StringMap<Object> {
 	 */
 	public String string(String name) {
 		Object obj = get(name);
-		return isEmpty(obj) ? "" : obj instanceof String ? (String)obj : obj.toString().trim();
+		return isEmpty(obj) ? "" : obj instanceof String str ? str : obj.toString().trim();
 	}
 
 	/**지정하는 이름의 값을 Number로 변환하여 반환한다.
@@ -102,10 +102,10 @@ public class DataObject extends StringMap<Object> {
 		Object obj = get(name);
 		if (obj == null)
 			return Integer.valueOf(0);
-		if (obj instanceof Number)
-			return Number.class.cast(obj);
-		if (obj instanceof String)
-			return Double.valueOf((String)obj);
+		if (obj instanceof Number num)
+			return num;
+		if (obj instanceof String str)
+			return Double.valueOf(str);
 		throw new RuntimeException("The Object named '" + name + "' is not a Number");
 	}
 
@@ -121,7 +121,7 @@ public class DataObject extends StringMap<Object> {
 		if (obj == null)
 			return false;
 
-		Boolean bool = obj instanceof Boolean ? Boolean.class.cast(obj) : Boolean.valueOf(obj.toString());
+		Boolean bool = obj instanceof Boolean b ? b : Boolean.valueOf(obj.toString());
 		return bool.booleanValue();
 	}
 }
\ No newline at end of file
diff --git a/src/main/java/cokr/xit/foundation/data/JSON.java b/src/main/java/cokr/xit/foundation/data/JSON.java
index 5bc4ae5..75970b0 100644
--- a/src/main/java/cokr/xit/foundation/data/JSON.java
+++ b/src/main/java/cokr/xit/foundation/data/JSON.java
@@ -126,8 +126,8 @@ public class JSON extends AbstractComponent {
 	 * @return 객체를 변환한 JSON 문자열
 	 */
 	public String stringify(Object obj, boolean indent) {
-		if (obj instanceof String)
-			return (String)obj;
+		if (obj instanceof String str)
+			return str;
 
 		ObjectMapper mapper = getObjectMapper();
 		ObjectWriter writer = null;
diff --git a/src/main/java/cokr/xit/foundation/data/XML.java b/src/main/java/cokr/xit/foundation/data/XML.java
index 5aa9037..1ca624c 100644
--- a/src/main/java/cokr/xit/foundation/data/XML.java
+++ b/src/main/java/cokr/xit/foundation/data/XML.java
@@ -109,8 +109,8 @@ public class XML extends AbstractComponent {
 	 * @return 객체를 변환한 XML 문자열
 	 */
 	public String stringify(Object obj, boolean indent) {
-		if (obj instanceof String)
-			return (String)obj;
+		if (obj instanceof String str)
+			return str;
 
 		XmlMapper mapper = getXmlMapper();
 		ObjectWriter writer = !indent ? mapper.writer() : mapper.writerWithDefaultPrettyPrinter();
diff --git a/src/main/java/cokr/xit/foundation/data/paging/BoundedList.java b/src/main/java/cokr/xit/foundation/data/paging/BoundedList.java
index 49ca6b8..3747adb 100644
--- a/src/main/java/cokr/xit/foundation/data/paging/BoundedList.java
+++ b/src/main/java/cokr/xit/foundation/data/paging/BoundedList.java
@@ -55,8 +55,7 @@ public class BoundedList<E> extends ArrayList<E> {
 			if (first instanceof Map) {
 				Map<String, ?> row = (Map<String, ?>)first;
 				totalSize = Pageable.getTotalSize(row);
-			} else if (first instanceof Pageable) {
-				Pageable row = (Pageable)first;
+			} else if (first instanceof Pageable row) {
 				totalSize = row.getTotalSize();
 			}
 		}
diff --git a/src/main/java/cokr/xit/foundation/data/paging/MapperSupport.java b/src/main/java/cokr/xit/foundation/data/paging/MapperSupport.java
index 7ea1b29..9e9d3cb 100644
--- a/src/main/java/cokr/xit/foundation/data/paging/MapperSupport.java
+++ b/src/main/java/cokr/xit/foundation/data/paging/MapperSupport.java
@@ -41,10 +41,9 @@ public class MapperSupport extends MybatisPlugin {
 		Object obj = super.handle(resultSetHandler, statement);
 
 		Pageable.Info paging = pagingInfo.get();
-		if (paging != null && (obj instanceof List)) {
+		if (paging != null && (obj instanceof List<?> list)) {
 			pagingInfo.remove();
 
-			List<?> list = (List<?>)obj;
 			BoundedList<Object> boundedList = new BoundedList<>();
 			boundedList.setFetchSize(paging.fetchSize);
 			boundedList.addAll(list);
@@ -69,14 +68,12 @@ public class MapperSupport extends MybatisPlugin {
 		if (isEmpty(arg)) return;
 
 		now = ifEmpty(now, () -> dateFormat.format(new Date()));
-		if (arg instanceof AbstractEntity) {
-			setTimestamp(sqlType, (AbstractEntity)arg, now);
-		} else if (arg instanceof Map) {
-			Map<?, ?> map = (Map<?, ?>)arg;
+		if (arg instanceof AbstractEntity entity) {
+			setTimestamp(sqlType, entity, now);
+		} else if (arg instanceof Map<?, ?> map) {
 			for (Object o: map.values())
 				setEntityTimestamp(sqlType, o, now);
-		} else if (arg instanceof Iterable) {
-			Iterable<?> iterable = (Iterable<?>)arg;
+		} else if (arg instanceof Iterable<?> iterable) {
 			for (Object o: iterable)
 				setEntityTimestamp(sqlType, o, now);
 		} else if (arg.getClass().isArray()) {
diff --git a/src/main/java/cokr/xit/foundation/data/paging/MybatisPlugin.java b/src/main/java/cokr/xit/foundation/data/paging/MybatisPlugin.java
index f731b0f..010744f 100644
--- a/src/main/java/cokr/xit/foundation/data/paging/MybatisPlugin.java
+++ b/src/main/java/cokr/xit/foundation/data/paging/MybatisPlugin.java
@@ -125,11 +125,9 @@ public class MybatisPlugin extends AbstractComponent implements Interceptor {
 	}
 
 	protected void process(Object obj, Consumer<Object> processor) {
-		if (obj instanceof Map) {
-			Map<?, ?> map = (Map<?, ?>)obj;
+		if (obj instanceof Map<?, ?> map) {
 			map.values().forEach(processor);
-		} else if (obj instanceof Iterable) {
-			Iterable<?> objs = (Iterable<?>)obj;
+		} else if (obj instanceof Iterable<?> objs) {
 			for (Object o: objs)
 				processor.accept(o);
 		} else if (obj.getClass().isArray()) {
diff --git a/src/main/java/cokr/xit/foundation/data/paging/Pageable.java b/src/main/java/cokr/xit/foundation/data/paging/Pageable.java
index 4217bec..21ff74e 100644
--- a/src/main/java/cokr/xit/foundation/data/paging/Pageable.java
+++ b/src/main/java/cokr/xit/foundation/data/paging/Pageable.java
@@ -79,14 +79,12 @@ public interface Pageable {
 					Pageable.getPageNum(params),
 					Pageable.getFetchSize(params)
 				);
-			} else if (obj instanceof QueryRequest) {
-				QueryRequest req = (QueryRequest)obj;
+			} else if (obj instanceof QueryRequest req) {
 				return new Pageable.Info(
 					req.getPageNum(),
 					req.getFetchSize()
 				);
-			} else if (obj instanceof Pageable) {
-				Pageable pageable = (Pageable)obj;
+			} else if (obj instanceof Pageable pageable) {
 				return new Pageable.Info(
 					pageable.getPageNum(),
 					pageable.getFetchSize()
diff --git a/src/main/java/cokr/xit/foundation/util/ListSupport.java b/src/main/java/cokr/xit/foundation/util/ListSupport.java
index a1dc08a..8cb47e0 100644
--- a/src/main/java/cokr/xit/foundation/util/ListSupport.java
+++ b/src/main/java/cokr/xit/foundation/util/ListSupport.java
@@ -32,8 +32,8 @@ public class ListSupport<T> {
 	 */
 	public static <T> List<T> asList(Iterable<T> iterable) {
 		return iterable == null ? Collections.emptyList() :
-			iterable instanceof List<T> ?
-			(List<T>)iterable :
+			iterable instanceof List<T> list ?
+			list :
 			StreamSupport.stream(iterable.spliterator(), false).toList();
 	}
 
diff --git a/src/main/java/cokr/xit/foundation/web/AbstractController.java b/src/main/java/cokr/xit/foundation/web/AbstractController.java
index 529fe54..6b6d49d 100644
--- a/src/main/java/cokr/xit/foundation/web/AbstractController.java
+++ b/src/main/java/cokr/xit/foundation/web/AbstractController.java
@@ -142,6 +142,7 @@ public abstract class AbstractController extends AbstractComponent {
 	 * @return ModelAndView
 	 */
 	protected ModelAndView setCollectionInfo(ModelAndView mav, Collection<?> collection, String prefixKey, String prefix) {
+		boolean toJson = !"jsonView".equals(mav.getViewName());
 		mav.addObject(prefixKey, prefix)
 		   .addObject(prefix + "List", collection)
 		   .addObject(prefix + "Start", 0)
@@ -173,8 +174,7 @@ public abstract class AbstractController extends AbstractComponent {
 	 * @return ModelAndView
 	 */
 	protected ModelAndView setPagingInfo(ModelAndView mav, Collection<?> collection, String prefix) {
-		if (collection instanceof BoundedList) {
-			BoundedList<?> bounded = (BoundedList<?>)collection;
+		if (collection instanceof BoundedList<?> bounded) {
 			Map<String, Object> map = Map.of(
 				"start", bounded.getStart(),
 				"totalSize", bounded.getTotalSize(),
diff --git a/src/main/java/cokr/xit/foundation/web/DownloadView.java b/src/main/java/cokr/xit/foundation/web/DownloadView.java
index cf0dc92..4d9f9b5 100644
--- a/src/main/java/cokr/xit/foundation/web/DownloadView.java
+++ b/src/main/java/cokr/xit/foundation/web/DownloadView.java
@@ -20,8 +20,7 @@ import cokr.xit.foundation.Downloadable;
 public class DownloadView extends AbstractView {
 	public static String getFilename(Map<String, Object> model) {
 		Object obj = model.get("download");
-		if (obj instanceof Downloadable) {
-			Downloadable downloadable = (Downloadable)obj;
+		if (obj instanceof Downloadable downloadable) {
 			return downloadable.getFilename();
 		}
 		return null;
diff --git a/src/main/java/cokr/xit/foundation/web/WebClient.java b/src/main/java/cokr/xit/foundation/web/WebClient.java
index 53ea8b2..236fc7c 100644
--- a/src/main/java/cokr/xit/foundation/web/WebClient.java
+++ b/src/main/java/cokr/xit/foundation/web/WebClient.java
@@ -551,8 +551,7 @@ public class WebClient {
 				byteList.add(separator);
 
 				Object value = entry.getValue();
-				if (value instanceof Path) {
-					Path path = (Path)value;
+				if (value instanceof Path path) {
 					String mimeType = Files.probeContentType(path);
 					byteList.add(("\"" + entry.getKey() + "\"; filename=\"" + path.getFileName() + "\"\r\nContent-Type: " + mimeType + "\r\n\r\n").getBytes(charset));
 					byteList.add(Files.readAllBytes(path));