java正则_特殊字符处理

一、特殊字符转义

点的转义：. ==> \\u002E

美元符号的转义：$ ==> \\u0024
乘方符号的转义：^ ==> \\u005E
左大括号的转义：{ ==> \\u007B
左方括号的转义：[ ==> \\u005B
左圆括号的转义：( ==> \\u0028
竖线的转义：| ==> \\u007C
右圆括号的转义：) ==> \\u0029
星号的转义：* ==> \\u002A
加号的转义：+ ==> \\u002B
问号的转义：? ==> \\u003F

反斜杠的转义：\ ==> \\u005C

二、字符

中文：\u4e00-\u9fa5

空格：\\s

点(.)：//.(或\\.)

三、实例

3.1 匹配xml标签元素

String xmlStr = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
		+ "<RESPONSE><MSGBODY><SESSIONID>09ccacab7be538856cc925306e6f912e</SESSIONID><USERNAME>svili</USERNAME>"
		+ "<TOKEN>123456</TOKEN><STATUS>0000</STATUS></MSGBODY></RESPONSE>";

String regex = "<(/*[A-Za-z]+)>";
Pattern p = Pattern.compile(regex);
Matcher matcher = p.matcher(xmlStr);
StringBuffer sb = new StringBuffer();
while (matcher.find()) {
	matcher.appendReplacement(sb, "<" + matcher.group(1).toUpperCase() + ">");

}
matcher.appendTail(sb);

3.2 匹配数据集合

//对字段名做一些处理:${B1073034_201602}${B1073014_201602}
		String fields_regex = "\\u0024\\u007B([A-Z_a-z0-9]+)}";
		Matcher fields_matcher = Pattern.compile(fields_regex).matcher(fields);
		StringBuffer fieldsBuffer = new StringBuffer();
		while (fields_matcher.find()) {
			fields_matcher.appendReplacement(fieldsBuffer, "," + fields_matcher.group(1));
		}
		//fields_matcher.appendTail(fieldsBuffer);
		//对字段值做一些处理:#{字段值:汉字,空,时间,字符,数字_-},#{}
		String values_regex = "#\\u007B([\u4e00-\u9fa5A-Z_a-z0-9//.\\s:-]*)}";
		Matcher values_matcher = Pattern.compile(values_regex).matcher(values);
		StringBuffer valuesBuffer = new StringBuffer();
		while (values_matcher.find()) {
			values_matcher.appendReplacement(valuesBuffer, values_matcher.group(1));
		}
		//values_matcher.appendTail(valuesBuffer);