泛型函数返回类型优化

modules/core/src/main/java/com/jeesite/modules/sys/entity/EmpUser.java

@@ -107,7 +107,7 @@ public class EmpUser extends User {
 		@ExcelField(title="最后登录", attrName="lastLoginDate", align=Align.CENTER, words=20, sort=900, type=ExcelField.Type.EXPORT),
 	})
 	public Employee getEmployee(){
-		Employee employee = (Employee)super.getRefObj();
+		Employee employee = super.getRefObj();
 		if (employee == null){
 			employee = new Employee(getRefCode());
 			super.setRefObj(employee);

modules/core/src/main/java/com/jeesite/modules/sys/utils/EmpUtils.java

@@ -54,7 +54,7 @@ public class EmpUtils {
 	 */
 	public static Employee get(User user){
 		if (user != null && User.USER_TYPE_EMPLOYEE.equals(user.getUserType())){
-			return (Employee)user.getRefObj();
+			return user.getRefObj();
 		}
 		return null;
 	}