diff --git a/src/server/tools/Encoding.java b/src/server/tools/Encoding.java
index 232a7f6..72cf9cd 100644
--- a/src/server/tools/Encoding.java
+++ b/src/server/tools/Encoding.java
@@ -1,20 +1,48 @@
 package server.tools;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
+
 public class Encoding {
 	// 对指定的字符串进行md5编码
 	public static String md5(String password) {
-
-		return "";
+		try {
+			MessageDigest md = MessageDigest.getInstance("MD5");
+			byte[] digest = md.digest(password.getBytes());
+			StringBuilder sb = new StringBuilder();
+			for (byte b : digest) {
+				sb.append(String.format("%02x", b));
+			}
+			return sb.toString();
+		} catch (NoSuchAlgorithmException e) {
+			e.printStackTrace();
+			return null;
+		}
 	}
 
 	// 将指定的文件进行base64编码，返回编码字符串
 	public static String base64FromFile(String filePath) {
-		return "";
+		try {
+			byte[] fileBytes = Files.readAllBytes(Path.of(filePath));
+			return Base64.getEncoder().encodeToString(fileBytes);
+		} catch (IOException e) {
+			e.printStackTrace();
+			return null;
+		}
 	}
 
 	// 将base64编码字符串还原为文件,文件路径及文件名为filePath
-	public static String base64ToFile(String base64Str, String filePath) {
-		return "";
+	public static void base64ToFile(String base64Str, String filePath) {
+		try {
+			byte[] fileBytes = Base64.getDecoder().decode(base64Str);
+			Files.write(Path.of(filePath), fileBytes, StandardOpenOption.CREATE);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 	}
-
 }