diff --git a/neutrino-core/src/test/java/fun/asgc/neutrino/core/security/SecurityManagerTest.java b/neutrino-core/src/test/java/fun/asgc/neutrino/core/security/SecurityManagerTest.java
new file mode 100644
index 00000000..a288942d
--- /dev/null
+++ b/neutrino-core/src/test/java/fun/asgc/neutrino/core/security/SecurityManagerTest.java
@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) 2022 aoshiguchen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package fun.asgc.neutrino.core.security;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.stream.Collectors;
+
+/**
+ * @author: aoshiguchen
+ * @date: 2022/9/25
+ */
+public class SecurityManagerTest {
+
+    public static void main(String[] args) {
+        // -Djava.security.manager -Djava.security.policy=/work/tmp/policy1.policy
+        System.out.println("SecurityManager: " + System.getSecurityManager());
+
+        try (BufferedReader br = new BufferedReader(new FileReader("/work/tmp/test.txt"))){
+            System.out.println("content:\n" + br.lines().collect(Collectors.joining()));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        AccessController.doPrivileged(new PrivilegedAction<Object>() {
+            @Override
+            public Object run() {
+                System.out.println(System.getProperty("file.encoding"));
+                return null;
+            }
+        });
+//        System.out.println(System.getProperty("file.encoding"));
+    }
+
+}