public class Regular{
public static void main(String[]args){
//把字符串中的 "aaa"全部替换为"z" 打印zbzcz
System.out.println("aaabaaacaaa".replaceAll("a{3}","z"));
//把字符串的"aaa","aa"或者"a" 全部替换为"*" 打印*b*c*
System.out.println("aaabaaca".replaceAll("a{1,3},"\\*"));
//把字符串中的数字全部替换为"z" 打印zzzazzbzzcc
System.out.println("123a44b35cc".replaceAll("\ \d","z"));
//把字符串中的非数字全部替换为"0" 打印1234000435000
System.out.println("1234abc435def".replaceAll("\ \D","0"));
//把字符串中的"."全部替换为"\"打印abc\def\ghi\jk
System.out.println("abc.def.ghi.jk".replaceAll("\\.","\\\\"));
//把字符串中的"a.b"全部替换为"-","a.b"表示长度为3的字符串，以a开头以b结尾
//打印-hello-lining
System.out.println("axbhelloasblining".replaceAll("a.b","-"));
//把字符串中的所有词字符替换为"#"
//正则表达式"[a-zA-Z_0-9]等价于"\w"
//打印#.#.#.#.#.
System.out.println("a.b.c.1.2.".replace("\w","#"));
}
/**
* filter all html element.
* For example:<a href="www.sohu.com/test">hello!</a>
* The filter result is :hello!
* Notice:This method filter the text between "<" and ">"
* @param element
* @return
*/
public static String getTxtWithoutHTMLElement (String element)
{
// String reg="<[^<|^>]+>";
// return element.replaceAll(reg,"");
if(null==element||"".equals(element.trim()))
{
return element;
}
Pattern pattern=Pattern.compile("<[^<|^>]*>");
Matcher matcher=pattern.matcher(element);
StringBuffer txt=new StringBuffer();
while(matcher.find())
{
String group=matcher.group();
if(group.matches("<[\\s]*>"))
{
matcher.appendReplacement(txt,group);
}
else
{
matcher.appendReplacement(txt,"");
}
}
matcher.appendTail(txt);
repaceEntities(txt,"&","&");
repaceEntities(txt,"<","<");
repaceEntities(txt,">",">");
repaceEntities(txt,""","\"");
repaceEntities(txt," ","");
return txt.toString();
}
下面是测试用例：
public void testGetTxtWithoutHTMLElement ()
{
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<a href='a/test'>test</a>"));
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<a href='a/test'>test"));
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<input type='text'>test</input>"));
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<p>test"));
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<table><tr><td>test</td></tr></table>"));
assertEquals("te<st",ExcelHssfView.getTxtWithoutHTMLElement("<p>te<st"));
assertEquals("te>st",ExcelHssfView.getTxtWithoutHTMLElement("<p>te>st"));
assertEquals("tst",ExcelHssfView.getTxtWithoutHTMLElement("<p>t<e>st"));
assertEquals("t<st",ExcelHssfView.getTxtWithoutHTMLElement("<p>t<<e>st"));
assertEquals("<>test",ExcelHssfView.getTxtWithoutHTMLElement("<p><>test"));
assertEquals("< >test",ExcelHssfView.getTxtWithoutHTMLElement("<p>< >test"));
assertEquals("<<>test",ExcelHssfView.getTxtWithoutHTMLElement("<p><<>test"));
assertEquals("test",ExcelHssfView.getTxtWithoutHTMLElement("<table><tr><td> test</td></tr></table>"));
}
}