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

continew-starter-log/continew-starter-log-core/src/main/java/top/continew/starter/log/handler/AbstractLogHandler.java

@@ -70,7 +70,7 @@ public abstract class AbstractLogHandler implements LogHandler {
             return false;
         }
         Log classLog = AnnotationUtil.getAnnotation(targetClass, Log.class);
-        return null == classLog || !classLog.ignore();
+        return classLog == null || !classLog.ignore();
     }
 
     @Override

continew-starter-log/continew-starter-log-core/src/main/java/top/continew/starter/log/model/LogRequest.java

@@ -93,7 +93,7 @@ public class LogRequest {
         this.address = (includes.contains(Include.IP_ADDRESS))
             ? ExceptionUtils.exToNull(() -> IpUtils.getIpv4Address(this.ip))
             : null;
-        if (null == this.headers) {
+        if (this.headers == null) {
             return;
         }
         String userAgentString = this.headers.entrySet()

continew-starter-log/continew-starter-log-interceptor/src/main/java/top/continew/starter/log/interceptor/LogInterceptor.java

@@ -76,7 +76,7 @@ public class LogInterceptor implements HandlerInterceptor {
             Instant endTime = Instant.now();
             logHandler.accessLogFinish(AccessLogContext.builder().endTime(endTime).build());
             LogRecord.Started startedLogRecord = logTtl.get();
-            if (null == startedLogRecord) {
+            if (startedLogRecord == null) {
                 return;
             }
             // 结束日志记录