如何写BAT命令
[table=98%][tr][td][size=10pt][size=3][font=宋体]批处理中特殊符号[/font].[font=宋体]：[/font][/size][size=3] [/size]
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[font=宋体]隐藏执行的命令[/font],[font=宋体]只显示结果[/font].[/size]
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[font=宋体]例子[/font]:[/size]
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[size=3]echo [font=宋体]欢迎来到甲壳虫学习[/font]
[/size]
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[size=3]@echo [font=宋体]欢迎来到甲壳虫学习[/font]
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[size=3]pause [/size]
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[size=3]2.&[/size]
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[font=宋体]命令连接符号[/font].[font=宋体]就是把两个命令连续执行[/font],[font=宋体]不用分行[/font][/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir c:\ & dir d:\ & dir e:\[/size]
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[size=3]3.&&[/size]
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[size=3][font=宋体]连接两个命令[/font],[font=宋体]当[/font]&&[font=宋体]前的命令成功时[/font],[font=宋体]才执行[/font]&&[font=宋体]后的命令。[/font][/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir c:\ && dir d:\[/size]
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[size=3]dir z:\ && dir d:\[/size]
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[size=3]4.|[/size]
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[size=3][font=宋体]管道符[/font],[font=宋体]就是将上一个命令的输出内容[/font],[font=宋体]作为下一个命令的输入内容[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]type c:\windows\*.log|more[/size]
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[size=3]5.||[/size]
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[size=3][font=宋体]命令连接符号[/font],[font=宋体]表示上一条命令执行失败后[/font],[font=宋体]才执行[/font]||[font=宋体]符号后的内容[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir z:|| dir c:\[/size]
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[size=3]6.>[/size]
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[size=3][font=宋体]重定向符[/font],[font=宋体]将命令的输出结果重定向到其后面的设备中去，后面的设备中的内容被覆盖[/font].[/size]
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[size=3]dir c:\ >d:\test.txt[/size]
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[size=3]7.>>[/size]
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[size=3][font=宋体]重定向符[/font],[font=宋体]将命令的输出结果重定向到其后面的设备中去，后面的设备中的内容会被增加[/font][/size]
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[size=3][font=宋体]在后面[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir c:\ >>d:\test.txt[/size]
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[size=3]dir d:\ >>d:\test.txt[/size]
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[size=3]8.<[/size]
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[size=3][font=宋体]重定向符[/font],[font=宋体]将后面的指定设备的内容[/font],[font=宋体]作为前面命令的输入内容[/font][/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3][font=宋体]建立个[/font]1.txt[font=宋体]文件[/font],[font=宋体]内容为[/font]net user[/size]
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[size=3]nc -l -v -p 888[/size]
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[size=3]nc 127.0.0.1 888 <1.txt[/size]
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[size=3]9.^[/size]
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[font=宋体][size=3]取消特殊符号的作用[/size][/font]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]echo ^> >1.txt[/size]
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[size=3]9.%[/size]
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[size=3][font=宋体]有点特殊[/font],[font=宋体]我先讲一个[/font]%0 [font=宋体]它可以返回批处理所在绝对路径[/font][/size]
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[font=宋体][size=3]例子：[/size][/font]
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[size=3]@echo off[/size]
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[size=3]net user[/size]
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[size=3]%0[/size]
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[size=3]10.*[/size]
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[size=3][font=宋体]通配符号[/font],[font=宋体]表示任意个字符[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]del c:\windows\*.log[/size]
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[size=3]11.?[/size]
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[size=3][font=宋体]通配符号[/font],[font=宋体]表示任意一个字符[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]net ?ser[/size]
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[size=3]12.“.”[/size]
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[font=宋体][size=3]表示当前目录[/size][/font]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir .\[/size]
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[size=3]13.".."[/size]
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[font=宋体][size=3]表示上一级目录[/size][/font]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]cd..[/size]
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[size=3]14." "[/size]
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[size=3][font=宋体]界定符[/font],[font=宋体]通常用来引用含有空格的目录[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir "C:\Documents and Settings"[/size]
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[size=3]15.":"[/size]
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[size=3][font=宋体]标签定位符[/font],[font=宋体]表示后面的内容是一个标签名[/font][/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]@echo off[/size]
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[size=3]:start[/size]
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[size=3]echo Hello world,heiying is there..[/size]
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[size=3]pause[/size]
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[size=3]goto start[/size]
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[size=3]16.","[/size]
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[font=宋体][size=3]某些时候可以当空格使用[/size][/font]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]echo,[/size]
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[size=3]dir,c:\[/size]
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[size=3]17.";"[/size]
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[size=3][font=宋体]分号作用就是，当命令相同时，可以将不同目标用；来隔离[/font].[/size]
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[size=3][font=宋体]例子[/font]:[/size]
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[size=3]dir c:\;d:\[/size]
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[size=3][font=宋体]总结[/font]:[/size]
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[font=宋体][size=3]实例[/size][/font]
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[size=3]@echo off
[/size]
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[size=3]:refresh[/size]
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[size=3]ping [url]www.qq.com[/url]&&exit
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[size=3]ipconfig /release[/size]
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[size=3]pause[/size]
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[size=3]ipconfig /renew[/size]
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[size=3]pause[/size]
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[size=3]goto refresh[/size]
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