优化

src/main/java/com/jfinal/template/source/FileSource.java

@@ -89,15 +89,14 @@ public class FileSource implements ISource {
 	}
 	
 	public static StringBuilder loadFile(File file, String encoding) {
-		StringBuilder ret = new StringBuilder((int)file.length() + 3);
-		
-		char[] buf = new char[1024];
 		try (InputStreamReader isr = new InputStreamReader(new FileInputStream(file), encoding)) {
+			StringBuilder ret = new StringBuilder((int)file.length() + 3);
+			char[] buf = new char[1024];
 			for (int num; (num = isr.read(buf, 0, buf.length)) != -1;) {
 				ret.append(buf, 0, num);
 			}
-			
 			return ret;
+			
 		} catch (Exception e) {
 			throw new RuntimeException(e);
 		}