fix(资料中心): 资料中心完善

2024-01-08 17:04:21 +08:00
parent 6aeaca7d71
commit 0dd818017a
9 changed files with 159 additions and 76 deletions
@@ -0,0 +1,25 @@
+package com.jero.common.util;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+public class StreamUtils {
+
+    private StreamUtils(){
+    }
+    /**
+     * 按某个指定字段去重
+     *
+     * @param keyExtractor 需要去重的字段
+     * @return java.util.function.Predicate<T>
+     * @author 陈賝
+     * @date 2022/9/2 13:49
+     */
+    public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
+        Map<Object, Boolean> seen = new ConcurrentHashMap<>();
+        return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null;
+    }
+}
+