spring boot 获取用户ip

可以通过HttpServletRequest对象获取用户IP地址，代码如下：

@Autowired
HttpServletRequest request;

String userIp = request.getRemoteAddr();

或者通过代理服务器的方式获取真实IP地址，代码如下：

@Autowired
HttpServletRequest request;

String userIp = request.getHeader("X-Real-IP");
if (userIp == null || userIp.length() == 0 || "unknown".equalsIgnoreCase(userIp)) {
    userIp = request.getHeader("X-Forwarded-For");
}
if (userIp == null || userIp.length() == 0 || "unknown".equalsIgnoreCase(userIp)) {
    userIp = request.getHeader("Proxy-Client-IP");
}
if (userIp == null || userIp.length() == 0 || "unknown".equalsIgnoreCase(userIp)) {
    userIp = request.getHeader("WL-Proxy-Client-IP");
}
if (userIp == null || userIp.length() == 0 || "unknown".equalsIgnoreCase(userIp)) {
    userIp = request.getRemoteAddr();
}