java获取ip,浏览器类型，mac地址，数组型字符串转数组

/**
     * 获取外网IP
     * 
     * @param request
     * @return
     */
    public static String getRemoteHost(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;
    }
    
    /**
     * 
     * 获取浏览器类型
     * @param request
     * @return
     */
    public static String getRequestBrowserInfo(HttpServletRequest request){
        String browserType = null;
        String header = request.getHeader("user-agent");
        if(header == null || header.equals("")){
           return "";
         }
        if(header.indexOf("MSIE")>0){
            browserType = "IE";
        }else if(header.indexOf("Firefox")>0){
            browserType = "Firefox";
        }else if(header.indexOf("Chrome")>0){
            browserType = "Chrome";
        }else if(header.indexOf("Safari")>0){
            browserType = "Safari";
        }else if(header.indexOf("Camino")>0){
            browserType = "Camino";
        }else if(header.indexOf("Konqueror")>0){
            browserType = "Konqueror";
        }
        return browserType;
    }
    
    
    /**
     * 
     * 获取用户mac地址
     * @param ip
     * @return
     */
    public static String getMacAddrByIp(String ip) {
        String macAddr = null;
        try {
            Process process = Runtime.getRuntime().exec("nbtstat -a " + ip);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(process.getInputStream()));
            Pattern pattern = Pattern.compile("([A-F0-9]{2}-){5}[A-F0-9]{2}");
            Matcher matcher;
            for (String strLine = br.readLine(); strLine != null;
                 strLine = br.readLine()) {
                matcher = pattern.matcher(strLine);
                if (matcher.find()) {
                    macAddr = matcher.group();
                    break;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return macAddr;
    }

/**
     * 数组型字符串转数组如 ["1,2","3"]
     */
    public static String[] strToArray(String str) {
        List arrayList = new ArrayList();
        String strNew = str.replace("[\"", "").replace("\"]", "").replace("\\/", "/");
        String[] strs = strNew.split("\",\"");
        return strs;
    }