完成部分帖子相关功能,同时完善了一些用户功能

Change-Id: Ie9d22bcceec197930d48f578d8b9a749ce7a3382
diff --git a/src/main/java/com/pt/service/UserService.java b/src/main/java/com/pt/service/UserService.java
index 7025e5a..bdffeea 100644
--- a/src/main/java/com/pt/service/UserService.java
+++ b/src/main/java/com/pt/service/UserService.java
@@ -5,6 +5,8 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
+
 @Service
 public class UserService {
 
@@ -42,4 +44,8 @@
     public void deleteById(String uid) {
         userRepository.deleteById(uid);
     }
+
+    public List<User> listAll() {
+        return userRepository.findAll();
+    }
 }