diff --git a/src/main/java/cc/ryanc/halo/service/impl/AttachmentServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/AttachmentServiceImpl.java
index 8c7be08e9..5ed6cfeb0 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/AttachmentServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/AttachmentServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class AttachmentServiceImpl extends AbstractCrudService<Attachment, Integer> implements AttachmentService {
 
-    private AttachmentRepository attachmentRepository;
+    private final AttachmentRepository attachmentRepository;
 
     public AttachmentServiceImpl(AttachmentRepository attachmentRepository) {
         super(attachmentRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/CategoryServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/CategoryServiceImpl.java
index a76ccfb27..08307dadd 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/CategoryServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/CategoryServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class CategoryServiceImpl extends AbstractCrudService<Category, Integer> implements CategoryService {
 
-    private CategoryRepository categoryRepository;
+    private final CategoryRepository categoryRepository;
 
     public CategoryServiceImpl(CategoryRepository categoryRepository) {
         super(categoryRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/GalleryServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/GalleryServiceImpl.java
index 190ffd567..9a0ec3d43 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/GalleryServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/GalleryServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class GalleryServiceImpl extends AbstractCrudService<Gallery, Integer> implements GalleryService {
 
-    private GalleryRepository galleryRepository;
+    private final GalleryRepository galleryRepository;
 
     public GalleryServiceImpl(GalleryRepository galleryRepository) {
         super(galleryRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/LinkServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/LinkServiceImpl.java
index 0bb0cbd1a..5bae9761d 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/LinkServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/LinkServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class LinkServiceImpl extends AbstractCrudService<Link, Integer> implements LinkService {
 
-    private LinkRepository linkRepository;
+    private final LinkRepository linkRepository;
 
     public LinkServiceImpl(LinkRepository linkRepository) {
         super(linkRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/LogServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/LogServiceImpl.java
index 4ea496e6f..28088d581 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/LogServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/LogServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class LogServiceImpl extends AbstractCrudService<Log, Long> implements LogService {
 
-    private LogRepository logRepository;
+    private final LogRepository logRepository;
 
     public LogServiceImpl(LogRepository logRepository) {
         super(logRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/MenuServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/MenuServiceImpl.java
index ed221e5bf..be813f017 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/MenuServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/MenuServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class MenuServiceImpl extends AbstractCrudService<Menu, Integer> implements MenuService {
 
-    private MenuRepository menuRepository;
+    private final MenuRepository menuRepository;
 
     public MenuServiceImpl(MenuRepository menuRepository) {
         super(menuRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/OptionServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/OptionServiceImpl.java
index 6ee7d0ca8..881e6e25b 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/OptionServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/OptionServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class OptionServiceImpl extends AbstractCrudService<Option, Integer> implements OptionService {
 
-    private OptionRepository optionRepository;
+    private final OptionRepository optionRepository;
 
     public OptionServiceImpl(OptionRepository optionRepository) {
         super(optionRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java
new file mode 100644
index 000000000..330bb762e
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/service/impl/PostServiceImpl.java
@@ -0,0 +1,23 @@
+package cc.ryanc.halo.service.impl;
+
+import cc.ryanc.halo.model.entity.Post;
+import cc.ryanc.halo.repository.PostRepository;
+import cc.ryanc.halo.service.PostService;
+import cc.ryanc.halo.service.base.AbstractCrudService;
+import org.springframework.stereotype.Service;
+
+/**
+ * Post service implementation.
+ *
+ * @author johnniang
+ */
+@Service
+public class PostServiceImpl extends AbstractCrudService<Post, Integer> implements PostService {
+
+    private final PostRepository postRepository;
+
+    public PostServiceImpl(PostRepository postRepository) {
+        super(postRepository);
+        this.postRepository = postRepository;
+    }
+}
diff --git a/src/main/java/cc/ryanc/halo/service/impl/TagServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/TagServiceImpl.java
index 786c693bb..10e849abe 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/TagServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/TagServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class TagServiceImpl extends AbstractCrudService<Tag, Integer> implements TagService {
 
-    private TagRepository tagRepository;
+    private final TagRepository tagRepository;
 
     public TagServiceImpl(TagRepository tagRepository) {
         super(tagRepository);
diff --git a/src/main/java/cc/ryanc/halo/service/impl/UserServiceImpl.java b/src/main/java/cc/ryanc/halo/service/impl/UserServiceImpl.java
index 618a073fd..2e2819093 100644
--- a/src/main/java/cc/ryanc/halo/service/impl/UserServiceImpl.java
+++ b/src/main/java/cc/ryanc/halo/service/impl/UserServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.stereotype.Service;
 @Service
 public class UserServiceImpl extends AbstractCrudService<User, Integer> implements UserService {
 
-    private UserRepository userRepository;
+    private final UserRepository userRepository;
 
     public UserServiceImpl(UserRepository userRepository) {
         super(userRepository);
diff --git a/src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java b/src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java
index 4815eafc4..22a1f0f2b 100644
--- a/src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java
+++ b/src/main/java/cc/ryanc/halo/web/controller/admin/AdminController.java
@@ -33,7 +33,7 @@ public class AdminController {
     }
 
     /**
-     * admin dashboard
+     * Admin dashboard.
      *
      * @param model model
      * @return template path: admin/admin_index.ftl
diff --git a/src/main/java/cc/ryanc/halo/web/controller/admin/UserController.java b/src/main/java/cc/ryanc/halo/web/controller/admin/UserController.java
index e6cf8bff7..854f005de 100644
--- a/src/main/java/cc/ryanc/halo/web/controller/admin/UserController.java
+++ b/src/main/java/cc/ryanc/halo/web/controller/admin/UserController.java
@@ -10,6 +10,6 @@ import org.springframework.web.bind.annotation.RequestMapping;
  * @date : 2019-03-14
  */
 @Controller
-@RequestMapping(value = "/admin/user")
+@RequestMapping(value = "/admin/users")
 public class UserController {
 }