build: 格式检查配置

style.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+        "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+    Checkstyle configuration that checks the Google coding conventions from Google Java Style
+    that can be found at https://google.github.io/styleguide/javaguide.html
+
+    Checkstyle is very configurable. Be sure to read the documentation at
+    http://checkstyle.org (or in your downloaded distribution).
+
+    To completely disable a check, just comment it out or delete it from the file.
+    To suppress certain violations please review suppression filters.
+
+    Authors: Max Vetrenko, Mauryan Kansara, Ruslan Diachenko, Roman Ivanov.
+ -->
+
+<module name="Checker">
+    <!-- 检查器配置 -->
+    <property name="charset" value="UTF-8"/>
+    <!-- 字符集 -->
+</module>