diff --git a/src/main/java/me/hatter/sample/tests/TestPasswordEncoder.java b/src/main/java/me/hatter/sample/tests/TestPasswordEncoder.java
new file mode 100644
index 0000000..b1a142c
--- /dev/null
+++ b/src/main/java/me/hatter/sample/tests/TestPasswordEncoder.java
@@ -0,0 +1,25 @@
+package me.hatter.sample.tests;
+
+import org.springframework.security.crypto.argon2.Argon2PasswordEncoder;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.LdapShaPasswordEncoder;
+import org.springframework.security.crypto.password.Md4PasswordEncoder;
+import org.springframework.security.crypto.password.Pbkdf2PasswordEncoder;
+import org.springframework.security.crypto.scrypt.SCryptPasswordEncoder;
+
+public class TestPasswordEncoder {
+    public static void main(String[] args) {
+        Argon2PasswordEncoder argon2PasswordEncoder = new Argon2PasswordEncoder();
+        System.out.println(argon2PasswordEncoder.encode("hello"));
+        SCryptPasswordEncoder sCryptPasswordEncoder = new SCryptPasswordEncoder();
+        System.out.println(sCryptPasswordEncoder.encode("hello"));
+        BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
+        System.out.println(bCryptPasswordEncoder.encode("hello"));
+        Pbkdf2PasswordEncoder pbkdf2PasswordEncoder = new Pbkdf2PasswordEncoder();
+        System.out.println(pbkdf2PasswordEncoder.encode("hello"));
+        LdapShaPasswordEncoder ldapShaPasswordEncoder = new LdapShaPasswordEncoder();
+        System.out.println(ldapShaPasswordEncoder.encode("hello"));
+        Md4PasswordEncoder md4PasswordEncoder = new Md4PasswordEncoder();
+        System.out.println(md4PasswordEncoder.encode("hello"));
+    }
+}