配置 Git 忽略文件

1. 创建忽略规则文件：git.ignore
2.文件的存放位置：原则上在哪里都可以，放在“~/”目录下(即用户家目录)
3.git.ignore 文件模版

# Compiled class file
*.class
# Log file
*.log
# BlueJ files
*.ctxt
# Mobile Tools for Java (J2ME)
.mtj.tmp/
# Package Files #
*.jar
*.war
*.nar
*.ear
*.zip
*.tar.gz
*.rar
# virtual machine crash logs, see
http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid*
.classpath
.project
.settings
target
.idea
*.iml