style: 调整代码风格 null == xx => xx == null（更符合大众风格）

Author: Charles7c

continew-common/src/main/java/top/continew/admin/common/config/excel/ExcelDictConverter.java

@@ -59,7 +59,7 @@ public Object convertToJavaData(ReadCellData<?> cellData,
     public WriteCellData<String> convertToExcelData(Object data,
                                                     ExcelContentProperty contentProperty,
                                                     GlobalConfiguration globalConfiguration) {
-        if (null == data) {
+        if (data == null) {
             return new WriteCellData<>(StringConstants.EMPTY);
         }
         // 获取字典项数据
@@ -83,7 +83,7 @@ public WriteCellData<String> convertToExcelData(Object data,
      */
     private List<LabelValueResp> getDictCode(ExcelContentProperty contentProperty) {
         DictExcelProperty dictExcelProperty = contentProperty.getField().getAnnotation(DictExcelProperty.class);
-        if (null == dictExcelProperty) {
+        if (dictExcelProperty == null) {
             throw new IllegalArgumentException("Excel 字典转换器异常：请为字段添加 @DictExcelProperty 注解");
         }
         CommonDictItemService dictItemService = SpringUtil.getBean(CommonDictItemService.class);

continew-common/src/main/java/top/continew/admin/common/config/mybatis/MyBatisPlusMetaObjectHandler.java

@@ -56,7 +56,7 @@ public class MyBatisPlusMetaObjectHandler implements MetaObjectHandler {
      */
     @Override
     public void insertFill(MetaObject metaObject) {
-        if (null == metaObject) {
+        if (metaObject == null) {
             return;
         }
         Long createUser = UserContextHolder.getUserId();
@@ -79,7 +79,7 @@ public void insertFill(MetaObject metaObject) {
      */
     @Override
     public void updateFill(MetaObject metaObject) {
-        if (null == metaObject) {
+        if (metaObject == null) {
             return;
         }
         Long updateUser = UserContextHolder.getUserId();

continew-common/src/main/java/top/continew/admin/common/config/websocket/WebSocketClientServiceImpl.java

@@ -36,7 +36,7 @@ public class WebSocketClientServiceImpl implements WebSocketClientService {
     public String getClientId(ServletServerHttpRequest request) {
         HttpServletRequest servletRequest = request.getServletRequest();
         String token = servletRequest.getParameter("token");
-        if (null == StpUtil.getLoginIdByToken(token)) {
+        if (StpUtil.getLoginIdByToken(token) == null) {
             throw new BusinessException("登录已过期，请重新登录");
         }
         return token;

continew-common/src/main/java/top/continew/admin/common/context/UserContextHolder.java

@@ -66,7 +66,7 @@ public static void setContext(UserContext context, boolean isUpdate) {
      */
     public static UserContext getContext() {
         UserContext context = CONTEXT_HOLDER.get();
-        if (null == context) {
+        if (context == null) {
             context = StpUtil.getSession().getModel(SaSession.USER, UserContext.class);
             CONTEXT_HOLDER.set(context);
         }
@@ -81,7 +81,7 @@ public static UserContext getContext() {
      */
     public static UserContext getContext(Long userId) {
         SaSession session = StpUtil.getSessionByLoginId(userId, false);
-        if (null == session) {
+        if (session == null) {
             return null;
         }
         return session.getModel(SaSession.USER, UserContext.class);
@@ -103,7 +103,7 @@ public static void setExtraContext(UserExtraContext context) {
      */
     public static UserExtraContext getExtraContext() {
         UserExtraContext context = EXTRA_CONTEXT_HOLDER.get();
-        if (null == context) {
+        if (context == null) {
             context = getExtraContext(StpUtil.getTokenValue());
             EXTRA_CONTEXT_HOLDER.set(context);
         }

continew-module-system/src/main/java/top/continew/admin/auth/handler/SocialLoginHandler.java

@@ -89,7 +89,7 @@ public LoginResp login(SocialLoginReq req, ClientResp client, HttpServletRequest
         String openId = authUser.getUuid();
         UserSocialDO userSocial = userSocialService.getBySourceAndOpenId(source, openId);
         UserDO user;
-        if (null == userSocial) {
+        if (userSocial == null) {
             String username = authUser.getUsername();
             String nickname = authUser.getNickname();
             UserDO existsUser = userService.getByUsername(username);

continew-module-system/src/main/java/top/continew/admin/auth/service/impl/OnlineUserServiceImpl.java

@@ -73,7 +73,7 @@ public List<OnlineUserResp> list(OnlineUserQuery query) {
         for (Map.Entry<Long, List<String>> entry : tokenMap.entrySet()) {
             Long userId = entry.getKey();
             UserContext userContext = UserContextHolder.getContext(userId);
-            if (null == userContext || !this.isMatchNickname(query.getNickname(), userContext) || !this
+            if (userContext == null || !this.isMatchNickname(query.getNickname(), userContext) || !this
                 .isMatchClientId(query.getClientId(), userContext)) {
                 continue;
             }

continew-module-system/src/main/java/top/continew/admin/system/config/file/FileRecorderImpl.java

@@ -75,7 +75,7 @@ public boolean save(FileInfo fileInfo) {
     @Override
     public FileInfo getByUrl(String url) {
         FileDO file = this.getFileByUrl(url);
-        if (null == file) {
+        if (file == null) {
             return null;
         }
         StorageDO storageDO = storageMapper.lambdaQuery().eq(StorageDO::getId, file.getStorageId()).one();
@@ -85,7 +85,7 @@ public FileInfo getByUrl(String url) {
     @Override
     public boolean delete(String url) {
         FileDO file = this.getFileByUrl(url);
-        if (null == file) {
+        if (file == null) {
             return false;
         }
         return fileMapper.lambdaUpdate().eq(FileDO::getId, file.getId()).remove();

continew-module-system/src/main/java/top/continew/admin/system/service/impl/UserSocialServiceImpl.java

@@ -51,7 +51,7 @@ public UserSocialDO getBySourceAndOpenId(String source, String openId) {
 
     @Override
     public void saveOrUpdate(UserSocialDO userSocial) {
-        if (null == userSocial.getCreateTime()) {
+        if (userSocial.getCreateTime() == null) {
             baseMapper.insert(userSocial);
         } else {
             baseMapper.lambdaUpdate()

continew-plugin/continew-plugin-generator/src/main/java/top/continew/admin/generator/service/impl/GeneratorServiceImpl.java

@@ -119,7 +119,7 @@ public PageResp<GenConfigDO> pageGenConfig(GenConfigQuery query, PageQuery pageQ
     @Override
     public GenConfigDO getGenConfig(String tableName) throws SQLException {
         GenConfigDO genConfig = genConfigMapper.selectById(tableName);
-        if (null == genConfig) {
+        if (genConfig == null) {
             genConfig = new GenConfigDO(tableName);
             // 默认包名（当前包名）
             String packageName = ClassUtil.getPackage(GeneratorService.class);