From 6b57a8161c4ecff398136518fe0246c20e00496f Mon Sep 17 00:00:00 2001
From: 疯狂的狮子li <15040126243@163.com>
Date: 星期二, 05 七月 2022 11:00:27 +0800
Subject: [PATCH] add 增加 StreamUtils 流工具 简化 stream 流操纵
---
ruoyi-common/src/main/java/com/ruoyi/common/utils/StreamUtils.java | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/StreamUtils.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/StreamUtils.java
new file mode 100644
index 0000000..dbb6f21
--- /dev/null
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/StreamUtils.java
@@ -0,0 +1,34 @@
+package com.ruoyi.common.utils;
+
+import cn.hutool.core.collection.CollStreamUtil;
+import cn.hutool.core.collection.CollUtil;
+
+import java.util.*;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+public class StreamUtils extends CollStreamUtil {
+
+ public static <E> List<E> filter(Collection<E> collection, Predicate<E> function) {
+ if (CollUtil.isEmpty(collection)) {
+ return Collections.emptyList();
+ }
+ return collection.stream().filter(function).collect(Collectors.toList());
+ }
+
+ public static <E> String join(Collection<E> collection, Function<E, String> function) {
+ return join(collection, function, ",");
+ }
+
+ public static <E> String join(Collection<E> collection, Function<E, String> function, CharSequence delimiter) {
+ if (CollUtil.isEmpty(collection)) {
+ return StringUtils.EMPTY;
+ }
+ return collection.stream().map(function).filter(Objects::nonNull).collect(Collectors.joining(delimiter));
+ }
+
+ public static <E> List<E> sorted(Collection<E> collection, Comparator<E> comparing) {
+ return collection.stream().sorted(comparing).collect(Collectors.toList());
+ }
+}
--
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