java 判断用户是PC端和还是APP端登陆

public void getRequestHeader(HttpServletRequest request){
    // 从浏览器获取请求头信息
    String info= request.getHeader("user-agent");
    if(info.contains("Windows")){
        System.out.println("Windows pc端登陆");
        return;
    }

    if(info.contains("Macintosh")){
        System.out.println("Mac pc端登陆");
        return;
    }

    if(info.contains("Android")) {
        System.out.println("Android移动客户端");
        return;
    }

    if(info.contains("iPhone")) {
        System.out.println("iPhone移动客户端");
        return;
    }

    if(info.contains("iPad")) {
        System.out.println("iPad客户端");
        return;
    } 
    System.out.println("其他客户端");
}