jfinal 4.8

src/main/java/com/jfinal/core/Controller.java

@@ -164,8 +164,9 @@ public abstract class Controller {
 	 * @return a String representing the single value of the parameter
 	 */
 	public String getPara(String name) {
-		//return request.getParameter(name);
-		return getPara(name, null);
+		// return request.getParameter(name);
+		String result = request.getParameter(name);
+		return "".equals(result) ? null : result;
 	}
 	
 	/**