support google java style

Author: realDuYuanChao

.github/workflows/checkstyle.yml

@@ -0,0 +1,24 @@
+name: Code Formatter
+
+on: [push]
+
+jobs:
+ format:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v2
+ - uses: actions/setup-python@v2
+ - name: Set up JDK 12
+ uses: actions/setup-java@v1
+ with:
+ java-version: 12
+ - run: wget https://github.com/google/google-java-format/releases/download/google-java-format-1.9/google-java-format-1.9-all-deps.jar -O formatter.jar
+ - run: java -jar formatter.jar --replace --set-exit-if-changed $(find . -type f -name "*.java")
+ - name: Commit Format changes
+ if: failure()
+ run: |
+ git config --global user.name github-actions
+ git config --global user.email '${GITHUB_ACTOR}@users.noreply.github.com'
+ git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
+ git commit -am "Formatted with Google Java Formatter"
+ git push --force origin HEAD:$GITHUB_REF