String text = "vlsdfjs;lfasal;fjdslfjsdalkfjsadlk{{内容1}}xxx{{内容1}}aaa{{内容1}}aa{{内容1}}aa{{内容1}}adsfasdfsda";
        String regExp = "\\{\\{(.*?)\\}\\}";
        Matcher m = Pattern.compile(regExp).matcher(text);
        while (m.find())
            System.out.println(m.group(1));

------解决方案--------------------

是要最里层{}的内容吗？如果是这样的情况{{xx}yy{zz}}，是取xx和zz吗？
Java code
String s = "vlsdfjs;lfasal;fjdslfjsdalkfjsadlk{{内容1}yyy{内容2}}xxx{{内容1}zzz{内容3}}aaa{{内容1}}aa{{内容1}}aa{{内容1}}adsfasdfsda";
Pattern p = Pattern.compile("[{]([^{}]*)[}]");
Matcher m = p.matcher(s);
while (m.find()) {
    System.out.println(m.group(1));
}