http://www.cnblogs.com/JustinYoung/articles/editplus_regular_expression.html EditPlus正则表达式中英文详解

• \t Tab character.tab符号
• \n New line.新的一行（换行符）
• . Matches any character.任何字符
• | Either expression on its left and right side matches the target string.For example, “a|b” matches “a” and “b”.|符号两边的都匹配
• [] Any of the enclosed characters may match the target character.For example, “[ab]” matches “a” and “b”. “[0-9]” matches any digit.用[]括起来的都匹配
• [^] None of the enclosed characters may match the target character.For example, “[^ab]” matches all character EXCEPT “a” and “b”.“[^0-9]” matches any non-digit character.用[]括起来的都“不匹配”
• * Character to the left of asterisk in the expression should match 0 or more times.For example “be*” matches “b”, “be” and “bee”.“*”号左边的那个字符匹配0次或者更多次
• + Character to the left of plus sign in the expression should match 1 or more times.For example “be+” matches “be” and “bee” but not “b”.“*”号左边的那个字符匹配1次或者更多次
• ? Character to the left of question mark in the expression should match 0 or 1 time.For example “be?” matches “b” and “be” but not “bee”.“*”号左边的那个字符匹配0次或者1次
• ^ Expression to the right of ^ matches only when it is at the beginning of line.For example “^A” matches an “A” that is only at the beginning of line.只匹配以“^”号右边的字符为一行开头的字符。
• $ Expression to the left of $ matches only when it is at the end of line.For example “e$” matches an “e” that is only at the end of line.只匹配以“$”号左边的字符为一行结束的字符。
• () Affects evaluation order of expression and also used for tagged expression.标示表达式区域
• \ scape character. If you want to use character “\” itself, you should use “\\”.转义字符，如果你想匹配"\"。请使用"\\"
• \0你使用正则表达式找到的东西

常用EditPlus正则表达式实例

把img标签的alt去掉

搜索内容：alt="[^src| ]* 注："|"符号后有个空格
替换内容：alt=""

把带属性和样式的<font>标签去掉

第一步：把</font>去掉。
搜索内容:</font>
替换内容：不填

第二步：去掉带属性和样式的<font>标签
搜索内容：<font [^>]*>
替换内容：不填

去掉所有的空行

搜索内容：\n\n
替换内容：\n