.gitignore 模板

HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/

### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache

### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr

### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/

### VS Code ###
.vscode/

### log ###
logs/

或者 

HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**
!**/src/test/**

### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
.log

### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
.mvn
mvnw*

### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/

### VS Code ###
.vscode/

### generated files ###
bin/
gen/

### MAC ###
.DS_Store

### Other ###
logs/
log
temp/

问题：

.gitignore只能忽略未被track的文件，而git本地缓存。如果某些文件已经被纳入了版本管理中，则修改.gitignore是无效的

解决：

git rm -r --cached .
git add .
git commit -m 'update .gitignore'

IDEA配置.gitignore_git

IDEA配置.gitignore_intellij-idea_02