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ruoyi-bussiness/src/main/java/com/ruoyi/cms/util/Base64Util.java

@@ -0,0 +1,26 @@
+package com.ruoyi.cms.util;
+
+import java.util.Base64;
+
+public class Base64Util {
+    public static String longIdToBase64(long id) {
+        // 将 Long 转换为字节数组
+        byte[] bytes = new byte[8];
+        bytes[0] = (byte) (id >> 56);
+        bytes[1] = (byte) (id >> 48);
+        bytes[2] = (byte) (id >> 40);
+        bytes[3] = (byte) (id >> 32);
+        bytes[4] = (byte) (id >> 24);
+        bytes[5] = (byte) (id >> 16);
+        bytes[6] = (byte) (id >> 8);
+        bytes[7] = (byte) id;
+
+        // 使用 Base64 编码
+        return Base64.getEncoder().encodeToString(bytes);
+    }
+
+    public static void main(String[] args) {
+
+        System.out.println(Base64.getEncoder().encodeToString(String.valueOf(118154768l).getBytes()));
+    }
+}