fix remove second null for issue #3485

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-20.04, windows-latest, macos-latest ]
-        java: [ 8, 11, 17, 21 ]
+        java: [ 8, 11, 17, 21, 23 ]
       fail-fast: false
       max-parallel: 16
     name: Test on JDK ${{ matrix.java }} OS ${{ matrix.os }}

core/src/main/java/com/alibaba/fastjson2/JSONReader.java

@@ -2746,6 +2746,7 @@ public abstract class JSONReader
                 }
                 case '/':
                     skipComment();
+                    --i;
                     continue;
                 default:
                     throw new JSONException(info());

core/src/test/java/com/alibaba/fastjson2/issues_3400/Issue3485.java

@@ -0,0 +1,25 @@
+package com.alibaba.fastjson2.issues_3400;
+
+import com.alibaba.fastjson2.*;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue3485 {
+    @Test
+    public void test() throws Exception {
+        String json = "{\n" +
+                "                    \"file_list\": [\n" +
+                "                        11,  // CreateBlogRequest.java - 可能需要修改以支持删除操作\n" +
+                "                        13,  // BlogRepository.java - 需要添加删除方法\n" +
+                "                        22,  // CreateBlogResponse.java - 可能需要修改以支持删除操作的响应\n" +
+                "                        26,  // BlogService.java - 需要添加删除博客的业务逻辑\n" +
+                "                        27,  // BlogPost.java - 可能需要修改以支持删除操作\n" +
+                "                        29,  // BlogController.java - 需要添加删除博客的API\n" +
+                "                        33   // BlogServiceTest.java - 需要添加删除博客的测试用例\n" +
+                "                    ]\n" +
+                "                }";
+        JSONObject jsonObject = JSON.parseObject(json);
+        assertEquals("{\"file_list\":[11,13,22,26,27,29,33]}", jsonObject.toJSONString());
+    }
+}