springboot 获取请求的ip地址

可以通过HttpServletRequest对象获取请求的IP地址。具体实现可以参考以下代码：

@RequestMapping("/get/ip")
@ResponseBody
public String getIp(HttpServletRequest request) {
    String ipAddress = request.getHeader("x-forwarded-for");
    if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
        ipAddress = request.getHeader("Proxy-Client-IP");
    }
    if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
        ipAddress = request.getHeader("WL-Proxy-Client-IP");
    }
    if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
        ipAddress = request.getRemoteAddr();
    }
    return ipAddress;
}

这段代码会先从请求头中获取"X-Forwarded-For"字段的值，如果没有则会尝试获取"Proxy-Client-IP"和"WL-Proxy-Client-IP"字段的值，最后如果都没有获取到，则会返回请求的远程IP地址。