获取客户端浏览器的信息

 /**
     * 获取浏览器信息
     *
     * @param request
     * @return
     */
    @Override
    public String getBrowser(HttpServletRequest request) {
        String userAgent = request.getHeader("User-Agent") ;
        String browser="UnKnown";
        if(StringUtils.isBlank(userAgent)){
            return browser;
        }
        String user = userAgent.toLowerCase();
        if (user.contains("edge"))
        {
            browser=(userAgent.substring(userAgent.indexOf("Edge")).split(" ")[0]).replace("/", "-");
        } else if (user.contains("msie"))
        {
            String substring=userAgent.substring(userAgent.indexOf("MSIE")).split(";")[0];
            browser=substring.split(" ")[0].replace("MSIE", "IE")+"-"+substring.split(" ")[1];
        } else if (user.contains("safari") && user.contains("version"))
        {
            browser=(userAgent.substring(userAgent.indexOf("Safari")).split(" ")[0]).split("/")[0]
                    + "-" +(userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1];
        } else if ( user.contains("opr") || user.contains("opera"))
        {
            if(user.contains("opera")){
                browser=(userAgent.substring(userAgent.indexOf("Opera")).split(" ")[0]).split("/")[0]
                        +"-"+(userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1];
            }else if(user.contains("opr")){
                browser=((userAgent.substring(userAgent.indexOf("OPR")).split(" ")[0]).replace("/", "-"))
                        .replace("OPR", "Opera");
            }

        } else if (user.contains("chrome"))
        {
            browser=(userAgent.substring(userAgent.indexOf("Chrome")).split(" ")[0]).replace("/", "-");
        } else if ((user.indexOf("mozilla/7.0") > -1) || (user.indexOf("netscape6") != -1)  ||
                (user.indexOf("mozilla/4.7") != -1) || (user.indexOf("mozilla/4.78") != -1) ||
                (user.indexOf("mozilla/4.08") != -1) || (user.indexOf("mozilla/3") != -1) )
        {
            browser = "Netscape-?";

        } else if (user.contains("firefox"))
        {
            browser=(userAgent.substring(userAgent.indexOf("Firefox")).split(" ")[0]).replace("/", "-");
        } else if(user.contains("rv"))
        {
            String IEVersion = (userAgent.substring(userAgent.indexOf("rv")).split(" ")[0]).replace("rv:", "-");
            browser="IE" + IEVersion.substring(0,IEVersion.length() - 1);
        } else
        {
            return browser;
        }
        return browser;
    }