优化分页逻辑

framework-common/src/main/java/com/chelvc/framework/common/model/Pagination.java

@@ -6,6 +6,7 @@ import java.util.List;
 import java.util.function.Function;
 
 import com.chelvc.framework.common.util.ObjectUtils;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.EqualsAndHashCode;
@@ -62,6 +63,16 @@ public class Pagination<T> implements Serializable {
         return (Pagination<T>) EMPTY_PAGINATION;
     }
 
+    /**
+     * 判断分页记录是否为空
+     *
+     * @return true/false
+     */
+    @JsonIgnore
+    public boolean isEmpty() {
+        return ObjectUtils.isEmpty(this.records);
+    }
+
     /**
      * 数据转换
      *
@@ -70,7 +81,7 @@ public class Pagination<T> implements Serializable {
      * @return 数据列表分页实例
      */
     public <M> Pagination<M> convert(@NonNull Class<M> type) {
-        return Pagination.<M>builder().total(this.total).pages(this.pages)
+        return this.isEmpty() ? empty() : Pagination.<M>builder().total(this.total).pages(this.pages)
                 .records(ObjectUtils.copying(this.records, type)).build();
     }
 
@@ -82,6 +93,7 @@ public class Pagination<T> implements Serializable {
      * @return 数据列表分页实例
      */
     public <M> Pagination<M> convert(@NonNull Function<List<T>, List<M>> adapter) {
-        return Pagination.<M>builder().total(this.total).pages(this.pages).records(adapter.apply(this.records)).build();
+        return this.isEmpty() ? empty() : Pagination.<M>builder().total(this.total).pages(this.pages)
+                .records(adapter.apply(this.records)).build();
     }
 }