修复保存带html后缀路径的问题

具体表现为: 新建文章时, "永久链接"以.html或者.htm结尾, 可以保存, 查看时ControllerNPE

src/main/java/cc/ryanc/halo/web/controller/admin/PostController.java

@@ -176,6 +176,7 @@ public class PostController extends BaseController{
                 List<Tag> tags = tagService.strListToTagList(StringUtils.trim(tagList));
                 post.setTags(tags);
             }
+            post.setPostUrl(urlFilter(post.getPostUrl()));
             postService.saveByPost(post);
             logsService.saveByLogs(new Logs(LogsRecord.PUSH_POST,post.getPostTitle(),HaloUtil.getIpAddr(request),HaloUtil.getDate()));
         }catch (Exception e){
@@ -183,6 +184,17 @@ public class PostController extends BaseController{
         }
     }
 
+    private static String urlFilter(String url) {
+        if (null != url) {
+            final boolean urlEndsWithHtmlPostFix = url.endsWith(".html") || url.endsWith(".htm");
+            if (urlEndsWithHtmlPostFix) {
+                return url.substring(0, url.lastIndexOf("."));
+            }
+        }
+        return url;
+    }
+
+
     /**
      * 处理移至回收站的请求
      *
@@ -282,6 +294,7 @@ public class PostController extends BaseController{
     @GetMapping(value = "/checkUrl")
     @ResponseBody
     public boolean checkUrlExists(@PathParam("postUrl") String postUrl){
+        postUrl = urlFilter(postUrl);
         Post post = postService.findByPostUrl(postUrl,HaloConst.POST_TYPE_POST);
         return null!=post;
     }