diff --git a/src/main/java/com/service/IUserService.java b/src/main/java/com/service/IUserService.java
new file mode 100644
index 0000000..1e32a55
--- /dev/null
+++ b/src/main/java/com/service/IUserService.java
@@ -0,0 +1,50 @@
+package com.service;
+
+import com.entity.User;
+import org.springframework.stereotype.Service;
+
+import java.util.Map;
+
+/**
+ * @ClassName IUserService
+ * @Description TODO
+ * @Author YHT
+ * @Date 2021/5/28 8:02
+ */
+
+public interface IUserService {
+    /**
+     * 根据ID查找用户信息
+     * @param id    ID
+     * @return  用户
+     */
+    User findById(Integer id);
+
+    /**
+     * 根据用户名和密码查找用户
+     * @param name
+     * @param password
+     * @return
+     */
+    User findByNameAndPwd(String name, String password);
+
+    /**
+     * 添加用户
+     * @param user
+     * @return
+     */
+    int insertUser(User user);
+
+    /**
+     * 修改用户信息
+     * @param user
+     */
+    void modifyUser(User user);
+
+    /**
+     * 修改用户密码
+     * @param password
+     * @param id
+     */
+    void modifyPwd(String password, Integer id);
+}