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String s = "<img alt=\"\" width=\"112\" height=\"150\" src=\"/WebRoot/UserFiles/image/8.jpg\"/>";
s = s.substring(s.indexOf("src=\"")+5, s.lastIndexOf("\""));
System.out.println(s);
String str = "<p><img alt=\"\" width=\"11\" height=\"150\" src=\"/WebRoot/UserFiles/image/8.jpg\"/></p><p><img alt=\"\" width=\"11\" height=\"150\" src=\"/WebRoot/UserFiles/image/xx.jpg\"/></p>";
String match = "(/WebRoot/UserFiles/image/(.*?).jpg)";
java.util.regex.Pattern p = Pattern.compile(match);
java.util.regex.Matcher matcher = p.matcher(str);
while(matcher.find()){
System.out.println(matcher.group());
}