参考配置

*.class
.DS_Store
application.pid

# Mobile Tools for Java (J2ME)
.mtj.tmp/

# Package Files #
*.jar
*.war
*.ear

# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*

# Eclipse
.classpath
.project
target
.settings

# Idea
.idea
*.iml

# git
*.orig

#忽略所有.svn目录
.svn/
#忽略所有target目录
target/
#忽略所有.idea目录
.idea/

工作目录下控制台输入目录

git rm -r --cached . 

git add .

git commit -m 'update .gitignore'