add isEmpty and isNotEmpty

src/main/java/com/imyeyu/java/TimiJava.java

@@ -5,7 +5,6 @@ import java.io.StringWriter;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Map;
-import java.util.Objects;
 
 /**
  *
@@ -71,14 +70,31 @@ public interface TimiJava {
 	}
 
 	static <T> T defaultIfNull(T obj, T defaultObj) {
-		return Objects.requireNonNullElse(obj, defaultObj);
+		return firstNotNull(obj, defaultObj);
 	}
 
 	static <T> T defaultIfEmpty(T obj, T defaultObj) {
-		if (isEmpty(obj)) {
+		return firstNotEmpty(obj, defaultObj);
-			return defaultObj;
+	}
+
+	@SafeVarargs
+	static <T> T firstNotNull(T... objects) {
+		for (int i = 0; i < objects.length; i++) {
+			if (objects[i] != null) {
+				return objects[i];
+			}
 		}
-		return obj;
+		return null;
+	}
+
+	@SafeVarargs
+	static <T> T firstNotEmpty(T... objects) {
+		for (int i = 0; i < objects.length; i++) {
+			if (TimiJava.isNotEmpty(objects[i])) {
+				return objects[i];
+			}
+		}
+		return null;
 	}
 
 	static String toString(Exception e) {

src/main/java/com/imyeyu/java/bean/BasePageResult.java

@@ -18,6 +18,24 @@ public class BasePageResult<T> {
 
 	protected List<T> list;
 
+	/**
+	 * 结果是否为空
+	 *
+	 * @return true 为空
+	 */
+	public boolean isEmpty() {
+		return list.isEmpty();
+	}
+
+	/**
+	 * 结果是否非空
+	 *
+	 * @return true 为非空
+	 */
+	public boolean isNotEmpty() {
+		return !isEmpty();
+	}
+
 	/**
 	 * 获取总数据量
 	 *