统一接口路径
> 现在所有接口路径都有统一的前缀/api/

Change-Id: I66f1dd0292fe2ffac789c583a06852a58d709b7e
diff --git a/src/main/java/edu/bjtu/groupone/backend/api/CategoryController.java b/src/main/java/edu/bjtu/groupone/backend/api/CategoryController.java
index 145703e..80617de 100644
--- a/src/main/java/edu/bjtu/groupone/backend/api/CategoryController.java
+++ b/src/main/java/edu/bjtu/groupone/backend/api/CategoryController.java
@@ -12,7 +12,7 @@
 import java.util.List;
 
 @RestController
-@RequestMapping("/api/categories")
+@RequestMapping("/api/category")
 @Tag(name = "Category", description = "分区相关接口")
 public class CategoryController {
 
diff --git a/src/main/java/edu/bjtu/groupone/backend/api/CommentController.java b/src/main/java/edu/bjtu/groupone/backend/api/CommentController.java
index d182c7e..fc24a53 100644
--- a/src/main/java/edu/bjtu/groupone/backend/api/CommentController.java
+++ b/src/main/java/edu/bjtu/groupone/backend/api/CommentController.java
@@ -17,6 +17,7 @@
 @CrossOrigin
 @Tag(name = "评论相关接口")
 @RestController
+@RequestMapping("/api/comment")
 public class CommentController {
 
     @Autowired
diff --git a/src/main/java/edu/bjtu/groupone/backend/api/DbTestController.java b/src/main/java/edu/bjtu/groupone/backend/api/DbTestController.java
index 77991fb..15cfce9 100644
--- a/src/main/java/edu/bjtu/groupone/backend/api/DbTestController.java
+++ b/src/main/java/edu/bjtu/groupone/backend/api/DbTestController.java
@@ -16,7 +16,7 @@
 
 @Tag(name = "数据库测试", description = "用于检测后端 DataSource 是否能正常连接数据库")
 @RestController
-@RequestMapping("/test")
+@RequestMapping("/api/dbtest")
 public class DbTestController {
 
     @Autowired
diff --git a/src/main/java/edu/bjtu/groupone/backend/api/PostController.java b/src/main/java/edu/bjtu/groupone/backend/api/PostController.java
index 0258f2d..2f198ec 100644
--- a/src/main/java/edu/bjtu/groupone/backend/api/PostController.java
+++ b/src/main/java/edu/bjtu/groupone/backend/api/PostController.java
@@ -17,6 +17,7 @@
 @CrossOrigin
 @Tag(name = "帖子相关接口")
 @RestController
+@RequestMapping("/api/post")
 public class PostController {
 
     @Autowired
diff --git a/src/main/java/edu/bjtu/groupone/backend/api/UserController.java b/src/main/java/edu/bjtu/groupone/backend/api/UserController.java
index 620e885..4baceee 100644
--- a/src/main/java/edu/bjtu/groupone/backend/api/UserController.java
+++ b/src/main/java/edu/bjtu/groupone/backend/api/UserController.java
@@ -28,6 +28,7 @@
 @Tag(name = "用户相关接口") //输入http://localhost:8080/swagger-ui/index.html或http://localhost:8080/v3/api-docs/可查看接口文档
 @RestController
 @Slf4j
+@RequestMapping("/api/user")
 public class UserController {
 
     @Autowired