load(..), template(..) 추가

src/main/java/cokr/xit/base/docs/xls/XLS.java

@@ -1,5 +1,6 @@
 package cokr.xit.base.docs.xls;
 
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 
@@ -7,6 +8,7 @@ import org.apache.poi.xssf.streaming.SXSSFCell;
 import org.apache.poi.xssf.streaming.SXSSFRow;
 import org.apache.poi.xssf.streaming.SXSSFSheet;
 import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
 import cokr.xit.foundation.AbstractComponent;
 
@@ -27,6 +29,33 @@ public abstract class XLS extends AbstractComponent {
 	/**현재 처리 중인 cell*/
 	protected SXSSFCell cell;
 
+	/**주어진 InputStream을 로드한다.
+	 * @param <T> XLS 유형
+	 * @param input InputStream
+	 * @return 현재 XLS
+	 */
+	public <T extends XLS> T load(InputStream input) {
+		try {
+			workbook = newWorkbook(input);
+			return self();
+		} catch (Exception e) {
+			throw runtimeException(e);
+		}
+	}
+
+	/**주어진 파일을 로드한다.
+	 * @param <T> XLS 유형
+	 * @param file 파일
+	 * @return 현재 XLS
+	 */
+	public <T extends XLS> T load(File file) {
+		try {
+			return load(new FileInputStream(file));
+		} catch (Exception e) {
+			throw runtimeException(e);
+		}
+	}
+
 	/**워크북을 반환한다.
 	 * @return 워크북
 	 */
@@ -35,7 +64,7 @@ public abstract class XLS extends AbstractComponent {
 			return workbook;
 
 		try {
-			workbook = newWorkbook();
+			workbook = newWorkbook(null);
 			workbook.setCompressTempFiles(true);
 			return workbook;
 		} catch (Exception e) {
@@ -47,8 +76,10 @@ public abstract class XLS extends AbstractComponent {
 	 * @return 워크북
 	 * @throws Exception
 	 */
-	protected SXSSFWorkbook newWorkbook() throws Exception {
-		return new SXSSFWorkbook(rowAccessWindowSize);
+	protected SXSSFWorkbook newWorkbook(InputStream input) throws Exception {
+		return input == null ?
+			new SXSSFWorkbook(rowAccessWindowSize) :
+			new SXSSFWorkbook(new XSSFWorkbook(input), rowAccessWindowSize);
 	}
 
 	/**지정한 인덱스의 워크시트를 반환한다.

src/main/java/cokr/xit/base/docs/xls/XLSWriter.java

@@ -2,6 +2,7 @@ package cokr.xit.base.docs.xls;
 
 import java.io.File;
 import java.io.FileOutputStream;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Collections;
 import java.util.Date;
@@ -24,6 +25,16 @@ import cokr.xit.foundation.Downloadable;
 public class XLSWriter extends XLS {
 	private Set<Integer> trackWidths;
 
+	public XLSWriter template(InputStream input) {
+		load(input);
+		return this;
+	}
+
+	public XLSWriter template(File file) {
+		load(file);
+		return this;
+	}
+
 	@Override
 	public XLSWriter worksheet(int index) {
 		super.worksheet(index);