Question

<span></span> 正则表达式 java

获取到的授权码：<span class="fb">738626</span> </div>
正则表达式该怎么写？提取738626

Answer 1

假设得到的授权码存于str中

方法一：

直接正则表达式提取授权码

Pattern pattern = Pattern.compile("\d+");
Matcher matcher = pattern.matcher(str);
String string = matcher.group(1);

方法二：

去除字符串中多余的html标签

Pattern pattern = Pattern.compile("<.+?>", Pattern.DOTALL);
Matcher matcher = pattern.matcher(str);
String string = matcher.replaceAll("");

Answer 2

方法一

String ResultString = null;

try {

Pattern regex = Pattern.compile("<span class=\"fb\">(.*)</span>");

Matcher regexMatcher = regex.matcher(subjectString);

if (regexMatcher.find()) {

ResultString = regexMatcher.group();

} 

} catch (PatternSyntaxException ex) {

// Syntax error in the regular expression

}

如果上述ID不唯一可用以下方式

List<String> matchList = new ArrayList<String>();

try {

Pattern regex = Pattern.compile("<span class=\"fb\">(.*)</span>");

Matcher regexMatcher = regex.matcher(subjectString);

while (regexMatcher.find()) {

matchList.add(regexMatcher.group());

} 

} catch (PatternSyntaxException ex) {

// Syntax error in the regular expression

}

Answer 3

String regEx = "^<span class=\"fb\">(.*)</span> </div>$";
String s = "<span class="fb">738626</span> </div>";
Pattern pat = Pattern.compile(regEx);
Matcher mat = pat.matcher(s);
for(int i=1;i<=mat.groupCount();i++){
　　System.out.println(mat.group(i));
}