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官方解释：

首先我们要分清spbill_create_ip参数是干嘛的？

---------spbill_create_ip 指的是终端ip，在APP和网页支付提交用户端ip，Native支付填调用微信支付API的机器IP。

那么归根结底，我们只要能获取正确的客户端ip,那么问题就可以解决，经过我艰苦卓绝的寻找，找到如下一个豪华版获取客户端ip的方法，只要用了它，java版H5支付就迎刃而解。如下：

/** 
     * 获取用户真实IP地址，不使用request.getRemoteAddr()的原因是有可能用户使用了代理软件方式避免真实IP地址, 
     * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值 
     *  
     *  获取终端ip(高配版)
     * @return ip
     */
    private String getIpAddr2(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for"); 
        System.out.println("x-forwarded-for ip: " + ip);
        if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {  
            // 多次反向代理后会有多个ip值，第一个ip才是真实ip
            if( ip.indexOf(",")!=-1 ){
                ip = ip.split(",")[0];
            }
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("Proxy-Client-IP");  
            System.out.println("Proxy-Client-IP ip: " + ip);
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("WL-Proxy-Client-IP");  
            System.out.println("WL-Proxy-Client-IP ip: " + ip);
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_CLIENT_IP");  
            System.out.println("HTTP_CLIENT_IP ip: " + ip);
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");  
            System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip);
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getHeader("X-Real-IP");  
            System.out.println("X-Real-IP ip: " + ip);
        }  
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
            ip = request.getRemoteAddr();  
            System.out.println("getRemoteAddr ip: " + ip);
        } 
        System.out.println("获取客户端ip: " + ip);
        return ip;  
    }