upload功能

Change-Id: Iad725ce3e2edd913531bf11705bf51000dde010d
diff --git a/src/main/java/com/pt5/pthouduan/entity/PasskeyContext.java b/src/main/java/com/pt5/pthouduan/entity/PasskeyContext.java
new file mode 100644
index 0000000..6a3229f
--- /dev/null
+++ b/src/main/java/com/pt5/pthouduan/entity/PasskeyContext.java
@@ -0,0 +1,17 @@
+package com.pt5.pthouduan.entity;
+
+public class PasskeyContext {
+    private static final ThreadLocal<String> passkeyHolder = new ThreadLocal<>();
+
+    public static void setPasskey(String passkey) {
+        passkeyHolder.set(passkey);
+    }
+
+    public static String getPasskey() {
+        return passkeyHolder.get();
+    }
+
+    public static void clear() {
+        passkeyHolder.remove();
+    }
+}
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