src/org/redkale/source/Flipper.java

@@ -40,6 +40,11 @@ public final class Flipper implements Serializable, Cloneable {
         this.offset = offset < 0 ? 0 : offset;
     }
 
+    public Flipper(int limit, String sortColumn) {
+        this.limit = limit > 0 ? limit : DEFAULT_LIMIT;
+        this.sort = sortColumn;
+    }
+
     public Flipper(int limit, int offset, String sortColumn) {
         this.limit = limit > 0 ? limit : DEFAULT_LIMIT;
         this.offset = offset < 0 ? 0 : offset;

src/org/redkale/util/SelectColumn.java

@@ -80,6 +80,18 @@ public class SelectColumn implements Predicate<String> {
         return new SelectColumn(columns, false);
     }
 
+    /**
+     * class中的字段名
+     *
+     * @param cols    包含的字段名集合
+     * @param columns 包含的字段名集合
+     *
+     * @return SelectColumn
+     */
+    public static SelectColumn createIncludes(String[] cols, String... columns) {
+        return new SelectColumn(Utility.append(cols, columns), false);
+    }
+
     /**
      * class中的字段名
      *
@@ -91,6 +103,18 @@ public class SelectColumn implements Predicate<String> {
         return new SelectColumn(columns, true);
     }
 
+    /**
+     * class中的字段名
+     *
+     * @param cols    排除的字段名集合
+     * @param columns 排除的字段名集合
+     *
+     * @return SelectColumn
+     */
+    public static SelectColumn createExcludes(String[] cols, String... columns) {
+        return new SelectColumn(Utility.append(cols, columns), true);
+    }
+
     @Override
     public boolean test(final String column) {
         if (this.columns != null) {